CN115769974A - cooking utensils - Google Patents

Abstract

The present application relates to the technical field of cooking utensils, in particular to a cooking utensil, wherein the cooking utensil includes a magnesium alloy pan embryo, the inner surface of the magnesium alloy pan embryo is provided with a corrosion-resistant layer, and the material of the corrosion-resistant layer is yttrium-magnesium alloy. The concentration of yttrium atoms in the layer is 10 ¹⁴ atoms/cm ³ to 10 ¹⁶ atoms/cm ³ . The cooking utensil provided by this application utilizes the characteristics of low density of magnesium alloy and the excellent corrosion resistance of yttrium-magnesium alloy, so that the cooking utensil has both light weight and excellent performance of corrosion resistance.

Description

cooking utensils

technical field

The present application relates to the technical field of cooking utensils, in particular to a cooking utensil.

Background technique

With the development of social economy, people's pursuit of cooking utensils is getting higher and higher. As a common kitchen utensil, in order to make the pan embryo have a good heating effect, the better the thermal conductivity of the material of the pan embryo is. It is more conducive to saving energy and improving work efficiency, so the pan embryo is generally made of iron or stainless steel, but the iron pan and stainless steel pan currently on the market are relatively heavy, and the pan embryo made of aluminum alloy can further reduce the weight of the pan embryo , but the aluminum alloy pot is also more difficult for cooking and turning the pot with one hand.

In order to solve this problem, the pot base made of magnesium alloy can be used to further reduce the weight compared with the existing aluminum alloy pot base. Even women can easily hold the pot for cooking and improve the user experience. However, the corrosion resistance of lightweight magnesium alloy pan blanks has always been a difficult problem, which affects the application of magnesium alloys in cookware.

Contents of the invention

The cooking utensils provided by the present application utilize the characteristics of low density of magnesium alloys and the excellent corrosion resistance of yttrium-magnesium alloys, so that the cooking utensils are lightweight and excellent in corrosion resistance.

In order to achieve the above purpose, the application specifically adopts the following technical solutions:

In a first aspect, the present application provides a cooking utensil, the cooking utensil includes a magnesium alloy pan embryo, the inner surface of the magnesium alloy pan embryo is provided with a corrosion-resistant layer, and the material of the corrosion-resistant layer is yttrium-magnesium alloy. The concentration of yttrium atoms in the corrosion-resistant layer is 10 ¹⁴ atoms/cm ³ to 10 ¹⁶ atoms/cm ³ .

In the above scheme, the density of magnesium is 1.738g/cm ³ , which is only 2/3 of aluminum, 1/4 of steel, and 1/3 of titanium. Therefore, under the same specification, the weight of the magnesium alloy pan can be reduced by 1/3 compared with the aluminum alloy pan, and the magnesium alloy pan embryo has obvious weight reduction effect. Cooking utensils make use of the low density of magnesium alloys and the excellent corrosion resistance of yttrium-magnesium alloys to make cooking utensils light and corrosion-resistant.

In a feasible implementation, the material of the magnesium alloy pan blank includes at least one of magnesium-aluminum-zinc alloy and magnesium-aluminum-manganese alloy.

In the above solution, the aluminum in the magnesium-aluminum-zinc alloy can enhance the solid solution strengthening effect; the zinc can improve the plasticity of the alloy, so that the alloy can have both light weight and good mechanical properties. The manganese in the magnesium-aluminum-manganese alloy can improve the corrosion resistance of the alloy and increase the service life of cooking utensils.

In a feasible embodiment, the thickness of the magnesium alloy pan blank is 2 mm to 5 mm.

In the above scheme, the thickness of the magnesium alloy pot blank is too thick, and the pot body is thick and the heat transfer rate is slow during use, which affects the use. The thickness of the magnesium alloy pan blank is too thin, the heat transfer is uneven, and the local temperature is easy to be too high.

In a feasible embodiment, the corrosion-resistant layer has at least one of the following features a to b:

a. The thickness of the corrosion-resistant layer is 0.5 μm to 5 μm;

b. The porosity of the corrosion-resistant layer is ≤2%.

In the above scheme, by controlling the parameters of the magnesium alloy pan embryo and the corrosion-resistant layer within a certain range, the weight of the prepared magnesium alloy pan embryo can be moderate, the preparation cost is appropriate, and the corrosion resistance protection effect is good, and the cooking utensils can have Better user experience.

In a feasible embodiment, the cooking utensil further includes a non-stick layer, and the non-stick layer is formed on the surface of the corrosion-resistant layer away from the magnesium alloy pan blank.

In the above solution, a non-stick layer is prepared on the surface of the corrosion-resistant layer, so that the cooking utensil has the advantages of light weight, corrosion resistance and non-stick.

In a feasible embodiment, the non-stick layer has at least one of the following features a to b:

a. The thickness of the non-stick layer is 35 μm to 75 μm;

b. The non-stick layer includes at least one of a ceramic non-stick layer and a fluorine paint non-stick layer.

In the above scheme, if the parameters of the non-stick layer are controlled within this range, the prepared non-stick layer has good mechanical properties and can have a better non-stick effect, and the non-stick layer has good bonding force with cooking utensils. Will not fall off during use of the cooking utensil.

In a second aspect, the present application provides a cooking utensil preparation method, the preparation method comprising the following steps:

Prepare the magnesium alloy into a magnesium alloy pot blank with a cooking cavity;

The yttrium in the yttrium source is implanted into the inner surface of the magnesium alloy pan blank in the form of ions by using an ion beam implantation process to form a corrosion-resistant layer to obtain a cooking utensil, wherein the yttrium atomic concentration in the corrosion-resistant layer is 10 ¹⁴ atoms/ cm ³ to 10 ¹⁶ atoms/cm ³ .

In the above scheme, the yttrium in the yttrium source is implanted into the inner surface of the magnesium alloy pan blank in the form of ions by using the ion beam implantation process, and the corrosion-resistant layer formed by the ion beam implantation process is firmly combined with the magnesium alloy pan blank, and there is no possibility of falling off. Phenomenon.

In a feasible embodiment, the preparation method has at least one of the following features a to g:

a. The magnesium alloy pan blank is formed by hot stamping or die-casting;

b. The material of the magnesium alloy pan embryo includes at least one of magnesium-aluminum-zinc alloy and magnesium-aluminum-manganese alloy;

c. The thickness of the magnesium alloy pan blank is 2mm to 5mm;

d. The yttrium source is an yttrium-magnesium alloy;

e. The yttrium source is an yttrium-magnesium alloy, and the mass fraction of the yttrium element in the yttrium-magnesium alloy is ≥50%;

f. the injection time is 20min to 40min;

g The thickness of the corrosion-resistant layer is 0.5 μm to 5 μm;

h. The porosity of the corrosion-resistant layer is ≤2%.

In the above solution, by controlling the parameters of the preparation method, the bonding force between the corrosion-resistant layer and the cooking utensils is stronger, and the corrosion-resistant layer can play a better role in corrosion resistance protection, so that the formed cooking utensils have better Mechanical performance, long service life.

In a feasible embodiment, after forming the corrosion-resistant layer, the preparation method further includes the following steps:

The non-stick coating is sprayed onto the surface of the corrosion-resistant layer by a spraying process to form a non-stick layer.

In the above solution, a non-stick layer is prepared on the surface of the corrosion-resistant layer, so that the cooking utensil has the advantages of light weight, corrosion resistance and non-stick.

In a feasible embodiment, the non-stick layer has at least one of the following features a to c:

a. The spraying process includes at least one of air spraying, high-pressure spraying, electrostatic spraying and low-flow medium-pressure spraying;

b. the spraying process is air spraying;

c. The non-stick coating includes at least one of ceramic non-stick coating and fluorine coating.

In the above scheme, air spraying is used to prepare the non-stick layer, the air spraying process is easy to operate, the spraying efficiency is high, and the prepared non-stick layer has good mechanical properties.

In a feasible implementation, the ion beam implantation process is used to implant the yttrium in the yttrium-magnesium alloy into the inner surface of the magnesium alloy pan blank in the form of ions to form a corrosion-resistant layer, including:

Preheating the magnesium alloy pan blank to a temperature of 150°C to 250°C, preheating the yttrium magnesium alloy target material to a temperature of 200°C to 250°C, and ionizing the yttrium magnesium alloy target material by arc discharge to form yttrium plasma;

In a vacuum environment, the yttrium ion beam formed by the yttrium plasma is injected into the preheated inner surface of the magnesium alloy pot blank through an implantation voltage of 80KeV to 120KeV to form an yttrium ion implantation layer;

annealing the magnesium alloy pan blank forming the yttrium ion implantation layer at 250°C to 300°C for 100min to 150min, so that a corrosion-resistant layer with a thickness of 0.5μm to 5μm is formed on the inner surface of the magnesium alloy pan blank, Get cooking utensils.

In the above scheme, the ion beam implantation process is used to inject the yttrium in the yttrium source into the inner surface of the magnesium alloy pan blank in the form of ions, and the formed corrosion-resistant layer is firmly combined with the magnesium alloy pan blank, and there is no phenomenon of falling off.

Beneficial effect:

The present application relates to the technical field of cooking utensils, in particular to a cooking utensil, wherein the cooking utensil includes a magnesium alloy pan embryo, the inner surface of the magnesium alloy pan embryo is provided with a corrosion-resistant layer, and the corrosion-resistant layer is formed on the inner surface of the magnesium alloy pan embryo. The material of the corrosion layer is yttrium-magnesium alloy. The cooking utensils provided by the present application utilize the characteristics of low density of magnesium alloys and the excellent corrosion resistance of yttrium-magnesium alloys, so that the cooking utensils are lightweight and excellent in corrosion resistance.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a cooking utensil provided by an embodiment of the present application;

Reference signs:

1- Magnesium alloy pot embryo;

2- Corrosion-resistant layer;

3- Non-stick layer.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

In the description of this specification, unless otherwise clearly stipulated and limited, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; unless otherwise specified or stated , the term "plurality" refers to two or more; the terms "connection", "fixation" and so on should be understood in a broad sense, for example, "connection" can be a fixed connection or a detachable connection, or an integrated connection, or Electrical connection; either directly or indirectly through an intermediary.

Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the description of this specification, it should be understood that the orientation words such as "up" and "down" described in the embodiments of the present application are described from the perspective shown in the drawings, and should not be interpreted as a description of the embodiments of the present application. limited. Furthermore, in this context, it also needs to be understood that when it is mentioned that an element is connected "on" or "under" another element, it can not only be directly connected "on" or "under" another element, but can also To be indirectly connected "on" or "under" another element through an intervening element.

In the first aspect, the present application provides a cooking utensil, and Fig. 1 is a schematic cross-sectional structure diagram of the cooking utensil provided by the embodiment of the present application. As shown in Fig. A corrosion-resistant layer 2 is provided, and the material of the corrosion-resistant layer 2 is yttrium-magnesium alloy, and the concentration of yttrium atoms in the corrosion-resistant layer 2 is 10 ¹⁴ atoms/cm ³ to 10 ¹⁶ atoms/cm ³ .

In the above scheme, the density of magnesium is 1.738g/cm ³ , which is only 2/3 of aluminum, 1/4 of steel, and 1/3 of titanium. Therefore, under the same specification, the weight of the magnesium alloy pan can be reduced by 1/3 compared with the aluminum alloy pan, and the magnesium alloy pan embryo has obvious weight reduction effect. Cooking utensils make use of the low density of magnesium alloys and the excellent corrosion resistance of yttrium-magnesium alloys to make cooking utensils light and corrosion-resistant.

The material in the magnesium alloy pan blank 1 used in this application includes at least one of magnesium-aluminum-zinc alloy and magnesium-aluminum-manganese alloy. It can be understood that the aluminum in the magnesium-aluminum-zinc alloy can enhance the solid solution strengthening effect, and the zinc can improve the alloy. The plasticity of the alloy enables the alloy to have both light weight and good mechanical properties. The manganese in the magnesium-aluminum-manganese alloy can improve the corrosion resistance of the alloy and increase the service life of cooking utensils. The material of the magnesium alloy pan blank 1 can be selected according to actual needs, and is not limited here.

In order to have a better use experience for cooking utensils, the prepared magnesium alloy pan blank 1 needs to be of moderate weight, and the weight can be controlled by controlling the thickness of the magnesium alloy pan blank 1. In this embodiment, the thickness of the magnesium alloy pan blank 1 is 2mm to 5mm. Optionally, the thickness of the magnesium alloy pan blank 1 may specifically be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc., which is not limited here. The thickness of the magnesium alloy pot blank 1 is too thick, and the pot body is thick and the heat transfer speed is slow during use, which affects the use. The thickness of the magnesium alloy pan blank 1 is too thin, the heat transfer is uneven, and the local temperature is easily caused to be too high. Preferably, the thickness of the magnesium alloy pan blank 1 may be 2.5 mm to 3.5 mm.

Wherein, the thickness of the corrosion-resistant layer 2 serving as corrosion-resistant protection on the inner surface of the magnesium alloy pan blank 1 is 0.5 μm to 5 μm. Optionally, the thickness of the corrosion-resistant layer 2 may specifically be 0.5 μm, 1 μm, 1.5 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, etc., which is not limited herein. If the thickness of the corrosion-resistant layer 2 is too thick, the preparation process is difficult, and the preparation cost of the corrosion-resistant layer 2 increases. If the thickness of the corrosion-resistant layer 2 is too thin, the corrosion resistance of the corrosion-resistant layer 2 decreases, and the effect of protecting the corrosion resistance of the magnesium alloy pan blank 1 is not obvious. Preferably, the thickness of the corrosion-resistant layer 2 may be 2 μm˜4 μm.

In order to improve the service life of cooking utensils, the porosity of the prepared corrosion-resistant layer 2 is ≤2%. Optionally, the porosity of the corrosion-resistant layer 2 may specifically be 0.1%, 0.2%, 0.3%, 0.5%, 1%, 1.5%, 2%, etc., which is not limited here. The porosity of the corrosion-resistant layer 2 is too high, and the compactness of the corrosion-resistant layer 2 is low. Soup and water are easy to corrode the magnesium alloy pan blank 1 through the pores, and cannot achieve a good corrosion-resistant protection effect. Preferably, the porosity of the corrosion-resistant layer 2 may be 1%-1.5%.

The corrosion resistance in cooking utensils is achieved through the excellent corrosion resistance of yttrium atoms in the corrosion-resistant layer 2, and the concentration of yttrium atoms in the corrosion-resistant layer 2 in the embodiment of the present application is 10 ¹⁴ atoms/cm ³ to 10 ¹⁶ atoms /cm ³ ; specifically, the concentration of yttrium atoms can be 10 ¹⁴ atoms/cm ³ , 20 ¹⁴ atoms/cm ³ , 40 ¹⁴ atoms/cm ³ , 60 ¹⁴ atoms/cm ³ , 80 ¹⁴ atoms/cm ³ , 10 ¹⁵ atoms /cm ³ , 20 ¹⁵ atoms/cm ³ , 50 ¹⁵ atoms/cm ³ , 80 ¹⁵ atoms/cm ³ , 10 ¹⁶ atoms/cm ³ , etc. are not limited here. The addition of yttrium has the effect of refining grains, has an age hardening effect, and improves the room temperature strength of magnesium alloys. At the same time, the addition of yttrium can increase the equilibrium potential of the magnesium alloy and reduce the corrosion current, thereby reducing the corrosion rate and improving the corrosion resistance of the magnesium alloy. The yttrium in the corrosion-resistant layer 2 can be selected within the above range according to the corrosion resistance protection effect required by the cooking utensils. The atomic concentration is not limited here.

In order to prolong the service life of the corrosion-resistant layer 2 and prevent the deformation of the corrosion-resistant layer 2, the corrosion-resistant layer 2 also needs to have a certain hardness. The hardness of the corrosion-resistant layer 2 can be 50GPa to 70GPa, specifically 65GPa, 66GPa, 67GPa, 68GPa , 69GPa, 70GPa, etc., are not limited here. The hardness of the corrosion-resistant layer 2 is too high, and it is difficult to control the balance between hardness and plasticity, resulting in cracking of the corrosion-resistant layer 2 . If the hardness of the corrosion-resistant layer 2 is too low, the ability of the corrosion-resistant layer 2 to resist deformation is weakened, which reduces the service life of the cooking utensil. Preferably, the hardness of the corrosion-resistant layer 2 may be 65GPa˜70GPa.

Further, the cooking utensil further includes a non-stick layer 3 formed on the surface of the corrosion-resistant layer 2 away from the magnesium alloy pot blank 1 . Specifically, the non-stick layer 3 includes at least one of a ceramic non-stick layer and a fluorine paint non-stick layer. That is, the non-stick layer 3 can use a single-layer non-stick layer or a composite non-stick layer, and the single-layer non-stick layer can only be provided with one deck of ceramic non-stick layer; the composite non-stick layer can be formed by multiple non-stick layers, such as A composite non-stick layer formed by a layer of ceramic non-stick layer and a layer of fluorine paint non-stick layer.

Wherein, the thickness of the non-stick layer 3 is 35 μm to 75 μm. Optionally, the thickness of the non-stick layer 3 may specifically be 35 μm, 45 μm, 55 μm, 65 μm, 75 μm, etc., which is not limited here. If the thickness of the non-stick layer 3 is too thick, the cost will increase, and the binding force of the non-stick layer 3 will decrease, which may cause the risk of the non-stick layer 3 falling off during use. If the thickness of the non-stick layer 3 is too thin, it is difficult to handle in the process, and the non-stick effect will be reduced. Preferably, the thickness of the non-stick layer 3 may be 40 μm˜60 μm.

During the heating and cooling process of cooking utensils, in order to prevent structural changes of the non-stick layer 3, the non-stick layer 3 needs to have certain high temperature resistance and low temperature resistance performance, and the temperature that the non-stick layer 3 can withstand is not more than 450°C. Within this temperature range, the non-stick layer 3 has better mechanical properties and can have a better non-stick effect.

In the actual application process, the material of the ceramic non-stick layer can be siloxane series non-stick materials, silazane series non-stick materials, nano-silica series non-stick materials, etc. The material of the non-stick layer of the fluorine coating can be polytetrafluoroethylene non-stick material, ammonium perfluorooctanoate non-stick material, copolymer non-stick material of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene, polyperfluoroethylene propylene copolymer Non-stick materials, ethylene-tetrafluoroethylene copolymer non-stick materials, etc. are not limited here.

It should be noted that other materials can also be selected to form the non-stick layer 3 , which can be selected according to actual needs, and are not limited here.

In a second aspect, the present application provides a cooking utensil preparation method, the preparation method comprising the following steps:

Step S10, preparing the magnesium alloy into a magnesium alloy pot blank with a cooking cavity;

Step S20, using an ion beam implantation process to inject yttrium in the yttrium source into the inner surface of the magnesium alloy pan blank in the form of ions to form a corrosion-resistant layer to obtain a cooking utensil, wherein the concentration of yttrium atoms in the corrosion-resistant layer is 10 ¹⁴ atoms/cm ³ to 10 ¹⁶ atoms/cm ³ .

In the above scheme, the ion beam implantation process is used to inject the yttrium in the yttrium source into the inner surface of the magnesium alloy pot embryo in the form of ions to form a corrosion-resistant layer, and take advantage of the low density of the magnesium alloy and the excellent corrosion resistance of the yttrium-magnesium alloy , so that the cooking utensils have excellent properties of light weight and corrosion resistance.

As an optional technical solution of the present application, in step S10, the magnesium alloy pan blank can be prepared by hot stamping or die-casting, and the magnesium alloy used in hot stamping or die-casting includes magnesium-aluminum-zinc alloy, magnesium-aluminum-manganese alloy at least one of .

Specifically, die-casting is to heat the magnesium alloy at high temperature and melt it, then fill the magnesium alloy molten body into the mold cavity through high pressure, open the mold after cooling and forming, and form a semi-finished pot embryo structure with an overall solid structure.

The inner and outer surfaces of the semi-finished magnesium alloy pan embryo are polished and deburred, and the semi-finished pan embryo is trimmed externally to obtain the magnesium alloy pan embryo.

Hot stamping is to heat the magnesium alloy plate and then press it to form a pan embryo. Hot stamping to form magnesium alloy pot blank specifically includes the following steps:

Firstly, the magnesium alloy plate at normal temperature is stamped into the rough blank of the magnesium alloy pan with the required outer contour, and the rough blank of the magnesium alloy pan is heated to about 350°C.

The heated magnesium alloy pan blank is transferred from the heating furnace to a mold with a cooling system inside, and the press is used for stamping and forming.

The magnesium alloy plate is rapidly cooled in the mold (for example, it can be water-cooled), and the cooling rate is generally 50°C/s to 100°C/s, so that the stamping part is hardened, the strength is greatly improved, and the magnesium alloy pan blank is finally obtained.

It should be noted that the magnesium alloy pan embryo can also be prepared by other methods, which can be selected according to actual needs, and are not limited here.

The magnesium alloy pan blank prepared by hot stamping or die-casting has a thickness of 2 mm to 5 mm. Optionally, the thickness of the magnesium alloy pan blank may specifically be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc., which is not limited herein. The thickness of the magnesium alloy pot blank is too thick, the pot body is thick and the heat transfer speed is slow during use, which affects the use. The thickness of the magnesium alloy pan blank is too thin, the heat transfer is uneven, and the local temperature is easy to be too high. Preferably, the thickness of the magnesium alloy pan blank can be 2.5 mm to 3.5 mm.

As an optional technical solution of the present application, in step S20, the yttrium in the yttrium source is implanted into the inner surface of the magnesium alloy blank in an ionized form by using an ion beam implantation process to form a corrosion-resistant layer. The material of the corrosion-resistant layer is yttrium-magnesium alloy. Specifically, yttrium atoms are doped into the magnesium alloy pot embryo to form yttrium-magnesium alloy.

It should be noted that, in this application, the yttrium-magnesium alloy target is used as the yttrium source, and an alloy formed of yttrium and other metals can also be used, which can be selected according to actual needs.

Specifically, step S20 includes:

Step S21, preheating the magnesium alloy pot blank to a temperature of 150°C to 250°C, preheating the yttrium magnesium alloy target material to a temperature of 200°C to 250°C, and ionizing the yttrium magnesium alloy target material by arc discharge to form yttrium plasma body;

Step S22, in a vacuum environment, injecting the yttrium ion beam formed by the yttrium plasma into the inner surface of the preheated magnesium alloy pot blank with an implantation voltage of 80KeV to 120KeV to form an yttrium ion implantation layer;

Step S23, placing the magnesium alloy pan embryo formed with the yttrium ion implantation layer at 250° C. to 300° C. for 100 min to 150 min and annealing for 100 min to 150 min, so that the inner surface of the magnesium alloy pan embryo forms a corrosion-resistant layer with a thickness of 0.5 μm to 5 μm, obtaining cooking utensils.

Specifically, before step S21, the magnesium alloy pan blank is subjected to a pretreatment process. The pretreatment process includes degreasing and rust removal. Through the pretreatment process, the combination of the subsequent corrosion-resistant layer and the magnesium alloy pan blank can be improved. Stronger power, improve the service life of cooking utensils.

After the pretreatment, the magnesium alloy pot blank and the yttrium-magnesium alloy target are installed in the yttrium ion implantation equipment.

The mass fraction of yttrium element in the yttrium-magnesium alloy target used in the yttrium ion implantation equipment is ≥50%. Optionally, the mass fraction of yttrium element in the yttrium-magnesium alloy target can be 50%, 60%, 70%, 80%, 90%, 100%, etc. are not limited here. The addition of yttrium has the effect of refining grains, has an age hardening effect, and improves the room temperature strength of magnesium alloys. At the same time, the addition of yttrium can increase the equilibrium potential of the magnesium alloy and reduce the corrosion current, thereby reducing the corrosion rate and improving the corrosion resistance of the magnesium alloy. The mass fraction of yttrium element in the yttrium-magnesium alloy target is too low, and finally the content of yttrium element injected into the corrosion-resistant layer is small, and the corrosion-resistant layer cannot play a good role in corrosion resistance protection. Preferably, the yttrium element in the yttrium-magnesium alloy target The mass fraction of elements is 75%.

In order not to affect the use of the magnesium alloy pan blank and the yttrium-magnesium alloy target material, in step S21, the magnesium alloy pan blank and the yttrium-magnesium alloy target material are preheated first. Among them, the preheating temperature of the magnesium alloy pan blank is 150°C to 250°C, and the preheating temperature of the yttrium magnesium alloy target is 200°C to 250°C. Optionally, the preheating temperature of the magnesium alloy pan embryo can specifically be 150°C, 160°C, 170°C, 180°C, 190°C, 200°C, 210°C, 220°C, 230°C, 240°C, 250°C, etc., yttrium The preheating temperature of the magnesium alloy target can be 200°C, 210°C, 220°C, 230°C,

240°C, 250°C, etc. The purpose of preheating is to remove moisture and enhance the bonding force between the corrosion-resistant plating material and the magnesium alloy pan blank. The magnesium alloy pan blank and the yttrium-magnesium alloy target can be preheated according to actual needs. Do limited.

After the preheating is completed, the magnesium alloy pan blank and the yttrium-magnesium alloy target can be used to ionize the yttrium-magnesium alloy into the corresponding yttrium plasma by using arc discharge in the arc reaction chamber.

The specific process of ionization is:

The yttrium-magnesium alloy is used as the electrode material of the anode and the cathode of the arc reaction chamber, and the anode and the cathode are placed oppositely inside the arc reaction chamber, and the length of the anode is usually longer than that of the cathode. The reaction chamber is provided with a protective gas inlet and outlet to provide a flowing protective gas environment.

When the reaction occurs, the reaction chamber is evacuated first, and an inert protective gas is passed through it, such as argon, nitrogen, etc., and after DC or AC is applied to both ends of the anode and the cathode, an arc will be generated between the anode and the cathode, and a In the high-temperature arc area, a large number of electrons concentrated in the cathode move to the anode at high speed, and continuously hit the anode to generate a large amount of yttrium plasma.

The yttrium plasma generated in step S21 is focused by injecting voltage in step S22 to form a beam of yttrium ions, that is, a flow of yttrium ions moving in the same direction at an approximate speed. Wherein, the injection voltage is 80KeV to 120KeV. Optionally, the injection voltage may specifically be 80KeV, 90KeV, 100KeV, 110KeV, 120KeV, etc., which is not limited herein. If the injection voltage is too high, the cost will increase, and the impact of the yttrium ion beam on the magnesium alloy pan embryo will easily cause damage to the surface of the magnesium alloy pan embryo. If the injection voltage is too small, it will be more difficult to inject yttrium plasma into the magnesium alloy pan blank, and the implantation depth is small, so the thickness of the formed corrosion-resistant layer is too small. It can be understood that the implantation depth of yttrium atoms in the corrosion-resistant layer is related to the implantation voltage. As the implantation voltage increases, the implantation depth of yttrium atoms increases. Preferably, the injection voltage may be 100KeV.

The current density of the yttrium ion beam formed by focusing the injection voltage is 1 mA/cm ² to 3 mA/cm ² . Optionally, the formed yttrium ion beam current density can specifically be 1mA/cm ² , 1.5mA/cm ² , 2mA/cm 2 , 2.7mA/cm ² , 2.8mA/ ^{cm 2 ,} 3mA/cm ² , etc., here No limit. If the current density of the formed yttrium ion beam is too large, there will be too many yttrium ions per unit area, which will increase the cost, and the formed corrosion-resistant layer will be too dense, which will affect the combination with the magnesium alloy pan blank. If the current density of the yttrium ion beam is too small, the mechanical properties of the prepared corrosion-resistant layer cannot meet the required requirements, which will affect the use of cooking utensils. Optionally, the current density of the formed yttrium ion beam may be 2 mA/cm ² .

In a vacuum environment, inject the formed yttrium ion beam into the inner surface of the magnesium alloy pot embryo to form an yttrium ion implantation layer, the vacuum degree of the vacuum environment is 10 ^-3 Pa to 10 ^-4 Pa, and optionally, the vacuum degree of the vacuum environment Specifically, it can be 10 ^-3 Pa, 2×10 ^{- 3} Pa, 5×10 ^-3 Pa, 610 ^-3 Pa, 7×10 ^-3 Pa, 10 ^-4 Pa, etc., and the vacuum of the vacuum environment can be selected according to actual needs. degree, not limited here.

In the process of yttrium ion beam implantation, it is necessary to control the injection time to control the amount of yttrium ion implantation in the cooking utensils, and the amount of yttrium ion implantation will ultimately affect the corrosion resistance and protection effect of the cooking utensils. In this application, the yttrium ion beam implantation time is 20 min to 40 min. Specifically, the yttrium ion beam implantation time can be 20 min, 25 min, 30 min, 32 min, 35 min, 38 min, 40 min, etc., which is not limited here. The implantation time of the yttrium ion beam is too short, and the amount of implantation of the yttrium ion is small, and the anti-corrosion protection effect of the prepared corrosion-resistant layer is not good, and the implantation time of the yttrium ion beam is too long, and the cost increases. Preferably, the injection time may be 30 minutes.

It should be noted that during the process of preparing the corrosion-resistant layer, the magnesium alloy pan blank needs to be rotated at a certain speed so that yttrium ions can be evenly injected into the magnesium alloy pan blank. In this embodiment, the rotation speed of the magnesium alloy pan blank is 15r/min˜40r/min. Optionally, the rotational speed of the magnesium alloy pan blank may specifically be 15 r/min, 20 r/min, 25 r/min, 30 r/min, 35 r/min, 40 r/min, etc., which is not limited herein. The rotational speed of the magnesium alloy pan embryo is too small, and the yttrium ion is injected unevenly on the inner surface of the magnesium alloy pan embryo, which is easy to cause accumulation and poor corrosion resistance. The rotational speed of the magnesium alloy pan embryo is too high. When the yttrium ion is implanted on the inner surface of the magnesium alloy pan embryo, the implantation of the yttrium ion is difficult due to the high rotational speed, and the implantation depth cannot meet the required requirements. Preferably, the rotation speed of the magnesium alloy pan blank can be 30r/min-35r/min.

After the yttrium ion implantation is completed, the magnesium alloy pan blank needs to be annealed, and the annealing process is carried out in a muffle furnace. Wherein, the annealing temperature is 250°C to 300°C, and the annealing time is 100min to 150min. Optionally, the annealing temperature can be 250°C, 260°C, 270°C, 280°C, 290°C, 300°C, etc., and the annealing time can be 100min, 110min, 120min, 130min, 140min, 150min, etc. limited. If the annealing temperature is too high or the annealing time is too long, the structure of the yttrium ion implanted layer will change. If the annealing temperature is too low or the annealing time is too short, the yttrium ions cannot fully diffuse, and the structural defects generated during the preparation process cannot be completely eliminated.

The corrosion-resistant layer that step S23 obtains, wherein:

The thickness of the corrosion-resistant layer is 0.5 μm to 5 μm. Optionally, the thickness of the corrosion-resistant layer may specifically be 0.5 μm, 1 μm, 1.5 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, etc., which is not limited herein. If the thickness of the corrosion-resistant layer is too thick, the preparation process is difficult, and the preparation cost of the corrosion-resistant layer increases. If the thickness of the corrosion-resistant layer is too thin, the corrosion-resistant ability of the corrosion-resistant layer will decrease, and the effect of protecting the corrosion resistance of the magnesium alloy pan blank is not obvious. Preferably, the thickness of the corrosion-resistant layer may be 2 μm˜4 μm.

The concentration of yttrium atoms in the corrosion-resistant layer is 10 ¹⁴ atoms/cm ³ to 10 ¹⁶ atoms/cm ³ ; optionally, the concentration of yttrium atoms can be 10 ¹⁴ atoms/cm ³ , 20 ¹⁴ atoms/cm ³ , 40 ¹⁴ atoms/cm 3 cm ³ , 60 ¹⁴ atoms/cm ³ , 80 ¹⁴ atoms/cm ³ , 10 ¹⁵ atoms/cm ³ , 20 ¹⁵ atoms/cm ³ , 50 ¹⁵ atoms/cm ³ , 80 ¹⁵ atoms/cm ³ , 10 ¹⁶ atoms/cm 3 ³ , etc., the addition of yttrium has the effect of refining grains, has an age hardening effect, and improves the room temperature strength of magnesium alloys. At the same time, the addition of yttrium can increase the equilibrium potential of the magnesium alloy and reduce the corrosion current, thereby reducing the corrosion rate and improving the corrosion resistance of the magnesium alloy. The yttrium atom in the corrosion-resistant layer can be selected within the above range according to the corrosion resistance protection effect required by the cooking utensils. Concentration is not limited here.

The porosity of the corrosion-resistant layer is ≤2%. Optionally, the porosity of the corrosion-resistant layer may specifically be 0.1%, 0.2%, 0.3%, 0.5%, 1%, 1.5%, 2%, etc., which is not limited herein. The porosity of the corrosion-resistant layer is too high, and the compactness of the corrosion-resistant layer is low. Soup and water can easily corrode the magnesium alloy pan embryo through the pores, and cannot achieve a good corrosion-resistant protection effect. Preferably, the porosity of the corrosion-resistant layer may be 1%-1.5%.

After step S20, the preparation method further includes:

In step S30, the non-stick coating is sprayed onto the surface of the corrosion-resistant layer by a spraying process to form a non-stick layer.

In the above solution, a non-stick layer is formed on the surface of the corrosion-resistant layer through a spraying process, so that the cooking utensil has both light weight, corrosion resistance and non-stick effects.

Wherein, as an optional technical solution of the present application, the spraying process includes at least one of air spraying, high-pressure spraying, electrostatic spraying, and low-flow medium-pressure spraying, which can be selected according to actual needs. In this application, the spraying process used is air spraying.

Specifically, step S30 includes:

Step S31, preheating the magnesium alloy pan;

Step S32, the preheated magnesium alloy pan blank can be sprayed with non-stick coating on the corrosion-resistant layer by air spraying process;

In step S33, after the non-stick coating is sprayed, the magnesium alloy pot blank is baked and dried to obtain a non-stick layer.

In step S31, the preheating temperature of the magnesium alloy pan blank is 45°C to 55°C. Optionally, the preheating temperature can be 45°C, 46°C, 47°C, 48°C, 49°C, 50°C, 51°C, 52°C, 53°C, 54°C, 55°C, etc. Preheating the magnesium alloy pan blank can activate the surface of the corrosion-resistant layer, which is beneficial to the combination of the non-stick coating and the corrosion-resistant layer. The preheating temperature can be controlled according to actual needs. Here No limit.

The preheated pot blank can be sprayed with non-stick coating. In step S32, the non-stick coating includes at least one of ceramic non-stick coating and fluorine coating. The air pressure in the spraying process is 0.3Mpa to 0.5Mpa. Optional , the air pressure in the spraying process can specifically be 0.3Mpa, 0.33Mpa, 0.36Mpa, 0.39Mpa, 0.458Mpa, 0.5Mpa, etc., which is not limited here. The air pressure in the spraying process is too high, and the degree of atomization of the non-stick coating is too large, which causes the non-stick coating to disperse seriously, resulting in waste. The air pressure in the spraying process is too low, and the degree of atomization of the non-stick coating is too low. The density is not high and the non-stick effect is low. Preferably, the air pressure in the spraying process can be 0.4Mpa-0.45Mpa.

After the non-stick coating is sprayed, the magnesium alloy pan blank is dried. In step S33, the magnesium alloy pan blank is set at a temperature range of 60°C to 80°C to dry the surface for 6min to 12min, and the dried magnesium alloy pan blank is placed in the Bake at 280°C for 15 minutes. Make the combination of the non-stick layer and the corrosion-resistant layer more dense, and prevent the non-stick layer from falling off during use.

Through the above steps S10, S20 and S30, a cooking utensil with light weight, corrosion resistance and non-stick performance can be obtained.

In order to better reflect the corrosion resistance and protection performance of the cooking utensils of the present application, a corrosion resistance test is now carried out on the cooking utensils of the present application.

Example 1:

(1) The magnesium alloy is prepared into a magnesium alloy pot embryo with a thickness of 4mm by hot stamping, and preheated to 200°C, and the yttrium-magnesium alloy target material and the yttrium element in the yttrium-magnesium alloy target material are separated by arc discharge. The mass fraction of 75%, ionized to form yttrium plasma;

(2) In a vacuum environment with a vacuum degree of 3×10 ^-3 Pa, the yttrium ion beam formed by focusing the yttrium plasma is injected into the inner surface of the preheated magnesium alloy pan blank through an injection voltage of 70KeV, and the injection time is 30min. forming an yttrium ion implantation layer;

(3) After the yttrium ion implantation is completed, place the magnesium alloy pan blank in a muffle furnace for annealing at 270°C for 125 minutes, so that a corrosion-resistant layer with a thickness of 0.5 μm is formed on the surface of the magnesium alloy pan blank, and the yttrium atomic concentration in the corrosion-resistant layer is is 10 ¹⁵ atoms/cm ³ ;

(4) Spray the non-stick material onto the surface of the corrosion-resistant layer preheated at 50° C. by spraying process, and bake at 280° C. for 15 minutes to form a non-stick layer with a thickness of 55 μm to obtain a cooking utensil.

Example 2:

(1) The magnesium alloy is prepared into a magnesium alloy pot embryo with a thickness of 4mm by hot stamping, and preheated to 200°C, and the yttrium-magnesium alloy target material and the yttrium element in the yttrium-magnesium alloy target material are separated by arc discharge. The mass fraction of 75%, ionized to form yttrium plasma;

(2) In a vacuum environment with a vacuum degree of 3 × 10 ^-3 Pa, the yttrium ion beam formed by focusing the yttrium plasma is injected into the inner surface of the preheated magnesium alloy pot blank through an injection voltage of 110KeV, and the injection time is 30min. forming an yttrium ion implantation layer;

(3) After the yttrium ion implantation is completed, the magnesium alloy pan blank is placed in a muffle furnace for 125min annealing at 270°C, so that a corrosion-resistant layer with a thickness of 2.5 μm is formed on the surface of the magnesium alloy pan blank, and the yttrium atomic concentration in the corrosion-resistant layer is is 10 ¹⁵ atoms/cm ³ ;

(4) Spray the non-stick material onto the surface of the corrosion-resistant layer preheated at 50° C. by spraying process, and bake at 280° C. for 15 minutes to form a non-stick layer with a thickness of 55 μm to obtain a cooking utensil.

Example 3:

(1) The magnesium alloy is prepared into a magnesium alloy pot embryo with a thickness of 4mm by hot stamping, and preheated to 200°C, and the yttrium-magnesium alloy target material and the yttrium element in the yttrium-magnesium alloy target material are separated by arc discharge. The mass fraction of 75%, ionized to form yttrium plasma;

(2) In a vacuum environment with a vacuum degree of 3×10 ^-3 Pa, the yttrium ion beam formed by focusing the yttrium plasma is injected into the inner surface of the preheated magnesium alloy pot blank through an injection voltage of 120KeV, and the injection time is 30min. forming an yttrium ion implantation layer;

(3) After the yttrium ion implantation is completed, the magnesium alloy pan blank is placed in a muffle furnace for 125 min at 270 °C, so that a corrosion-resistant layer with a thickness of 5 μm is formed on the surface of the magnesium alloy pan blank, and the concentration of yttrium atoms in the corrosion-resistant layer is 10 ¹⁵ atoms/cm ³ ;

(4) Spray the non-stick material onto the surface of the corrosion-resistant layer preheated at 50° C. by spraying process, and bake at 280° C. for 15 minutes to form a non-stick layer with a thickness of 55 μm to obtain a cooking utensil.

Example 4:

(1) The magnesium alloy is prepared into a magnesium alloy pot embryo with a thickness of 4mm by hot stamping, and preheated to 200°C, and the yttrium-magnesium alloy target material and the yttrium element in the yttrium-magnesium alloy target material are separated by arc discharge. The mass fraction of 75%, ionized to form yttrium plasma;

(2) In a vacuum environment with a vacuum degree of 3 × 10 ^-3 Pa, the yttrium ion beam formed by focusing the yttrium plasma is injected into the inner surface of the preheated magnesium alloy pot blank through an injection voltage of 110KeV, and the injection time is 30min. forming an yttrium ion implantation layer;

(3) After the yttrium ion implantation is completed, the magnesium alloy pan blank is placed in a muffle furnace for 125min annealing at 270°C, so that a corrosion-resistant layer with a thickness of 2.5 μm is formed on the surface of the magnesium alloy pan blank, and the yttrium atomic concentration in the corrosion-resistant layer is was 10 ¹⁵ atoms/cm ³ , and a cooking utensil was obtained.

Example 5:

(1) The magnesium alloy is prepared into a magnesium alloy pot embryo with a thickness of 4mm by hot stamping, and preheated to 200°C, and the yttrium-magnesium alloy target material and the yttrium element in the yttrium-magnesium alloy target material are separated by arc discharge. The mass fraction of 70%, ionized to form yttrium plasma;

(2) In a vacuum environment with a vacuum degree of 3×10 ^-3 Pa, the yttrium ion beam formed by focusing the yttrium plasma is injected into the inner surface of the preheated magnesium alloy pot blank through an injection voltage of 110KeV, and the injection time is 20min. forming an yttrium ion implantation layer;

(3) After the yttrium ion implantation is completed, the magnesium alloy pan blank is placed in a muffle furnace for 125min annealing at 270°C, so that a corrosion-resistant layer with a thickness of 2.5 μm is formed on the surface of the magnesium alloy pan blank, and the yttrium atomic concentration in the corrosion-resistant layer is is 10 ¹⁴ atoms/cm ³ ;

(4) Spray the non-stick material onto the surface of the corrosion-resistant layer preheated at 50° C. by spraying process, and bake at 280° C. for 15 minutes to form a non-stick layer with a thickness of 55 μm to obtain a cooking utensil.

Embodiment 6:

(1) The magnesium alloy is prepared into a magnesium alloy pot embryo with a thickness of 4mm by hot stamping, and preheated to 200°C, and the yttrium-magnesium alloy target material and the yttrium element in the yttrium-magnesium alloy target material are separated by arc discharge. The mass fraction of 99%, ionized to form yttrium plasma;

(2) In a vacuum environment with a vacuum degree of 3 × 10 ^-3 Pa, the yttrium ion beam formed by focusing the yttrium plasma is injected into the inner surface of the preheated magnesium alloy pan embryo through an injection voltage of 110KeV, and the injection time is 35min. forming an yttrium ion implantation layer;

(3) After the yttrium ion implantation is completed, the magnesium alloy pan blank is placed in a muffle furnace for 125min annealing at 270°C, so that a corrosion-resistant layer with a thickness of 2.5 μm is formed on the surface of the magnesium alloy pan blank, and the yttrium atomic concentration in the corrosion-resistant layer is is 10 ¹⁶ atoms/cm ³ ;

(4) Spray the non-stick material onto the surface of the corrosion-resistant layer preheated at 50° C. by spraying process, and bake at 280° C. for 15 minutes to form a non-stick layer with a thickness of 55 μm to obtain a cooking utensil.

Comparative example 1:

(1) The magnesium alloy is prepared into a magnesium alloy pot blank with a thickness of 4 mm by hot stamping.

(2) Spray the non-stick material onto the surface of the corrosion-resistant layer preheated at 50° C. by spraying process, and bake at 280° C. for 15 minutes to form a non-stick layer with a thickness of 55 μm to obtain a cooking utensil.

Comparative example 2:

The magnesium alloy is prepared into a magnesium alloy pot blank with a thickness of 4 mm by hot stamping.

Comparative example 3

(1) The magnesium alloy is prepared into a magnesium alloy pot embryo with a thickness of 4mm by hot stamping, and preheated to 200°C, and the yttrium-magnesium alloy target material and the yttrium element in the yttrium-magnesium alloy target material are separated by arc discharge. The mass fraction of 75%, ionized to form yttrium plasma;

(2) In a vacuum environment with a vacuum degree of 3 × 10 ^-3 Pa, the yttrium ion beam formed by focusing the yttrium plasma is injected into the inner surface of the preheated magnesium alloy pot blank through an injection voltage of 110KeV, and the injection time is 30min. forming an yttrium ion implantation layer;

(3) After the yttrium ion implantation is completed, the magnesium alloy pan blank is placed in a muffle furnace for 125min annealing at 270°C, so that a corrosion-resistant layer with a thickness of 2.5 μm is formed on the surface of the magnesium alloy pan blank, and the yttrium atomic concentration in the corrosion-resistant layer is is 10 ¹³ atoms/cm ³ ;

(4) Spray the non-stick material onto the surface of the corrosion-resistant layer preheated at 50° C. by spraying process, and bake at 280° C. for 15 minutes to form a non-stick layer with a thickness of 55 μm to obtain a cooking utensil.

test:

Test according to the salt water corrosion resistance requirements in GB/T32095.3-2015, inject 5% sodium chloride solution into the experimental vessel, make the solution reach more than 1/2 of the height of the cooking utensil, cover the lid and heat on the heating source until boiling. Then keep slightly boiling, continue to heat for 7 hours, and the sodium chloride solution volatilized in the boiling process should be replenished with distilled water in time to keep the height of the original solution constant. Remove the cooking utensils from the heat source, and place them at room temperature (23°C±2°C) for 16 hours. Rinse off salt stains with clean water and inspect visually immediately after blotting the surface with a soft cloth. This is a salt water cycle.

Test results of salt water corrosion resistance test

According to the test results of Examples 1-6, due to the excellent corrosion resistance of the yttrium-magnesium alloy, the yttrium in the yttrium-magnesium alloy is implanted into the inner surface of the magnesium alloy pan blank in the form of ions by ion beam implantation to form a corrosion-resistant layer. , so that the cooking utensils have excellent properties of light weight and corrosion resistance, and the anti-corrosion performance of cooking utensils is also different depending on the amount of yttrium injected at any time. In the range of the corrosion-resistant layer from 0.5 μm to 5 μm, the thicker the corrosion-resistant layer, The better the corrosion resistance of cooking utensils. The more yttrium element is injected, the better the corrosion resistance of cooking utensils.

According to the comparison of the test results of Comparative Example 1 and Example 1, it can be seen that Comparative Example 1 has no corrosion-resistant layer, and the surface of the magnesium alloy pan blank is partially corroded. According to the comparison of the test results of Comparative Example 2 and Example 1, it can be seen that the surface of the cooking utensil of Comparative Example 2 has no corrosion-resistant layer and non-stick layer, and the surface is corroded in a large area. According to the comparison of the test results of Comparative Example 3 and Example 1, it can be seen that the injection amount of yttrium in Comparative Example 3 is too low, and the corrosion resistance of the corrosion-resistant layer decreases.

Claims (11)

1. A cooking utensil, characterized in that, the cooking utensil comprises a magnesium alloy pan embryo, the inner surface of the magnesium alloy pan embryo is provided with a corrosion-resistant layer, and the material of the corrosion-resistant layer is yttrium-magnesium alloy. The concentration of yttrium atoms in the etching layer is 10 ¹⁴ atoms/cm ³ to 10 ¹⁶ atoms/cm ³ . 2. The cooking utensil according to claim 1, characterized in that, the material of the magnesium alloy pan base comprises at least one of magnesium-aluminum-zinc alloy and magnesium-aluminum-manganese alloy. 3. The cooking utensil according to claim 1, characterized in that the thickness of the magnesium alloy pan blank is 2mm to 5mm. 4. The cooking utensil according to claim 1, wherein the corrosion-resistant layer has at least one of the following features a to b: a. The thickness of the corrosion-resistant layer is 0.5 μm to 5 μm; b. The porosity of the corrosion-resistant layer is ≤2%. 5. The cooking utensil according to claim 1, characterized in that, the cooking utensil further comprises a non-stick layer formed on the surface of the corrosion-resistant layer away from the magnesium alloy pan blank. 6. The cooking utensil according to claim 5, wherein the non-stick layer has at least one of the following features a to b: a. The thickness of the non-stick layer is 35 μm to 75 μm; b. The non-stick layer includes at least one of a ceramic non-stick layer and a fluorine paint non-stick layer. 7. A preparation method of cooking utensil, characterized in that, said preparation method comprises the following steps: Prepare the magnesium alloy into a magnesium alloy pot blank with a cooking cavity; The yttrium in the yttrium source is implanted into the inner surface of the magnesium alloy pan blank in the form of ions by using an ion beam implantation process to form a corrosion-resistant layer to obtain a cooking utensil, wherein the yttrium atomic concentration in the corrosion-resistant layer is 10 ¹⁴ atoms/ cm ³ to 10 ¹⁶ atoms/cm ³ . 8. The preparation method according to claim 7, characterized in that, the preparation method has at least one of the following features a to h: a. The magnesium alloy pan blank is formed by hot stamping or die-casting; b. The material of the magnesium alloy pan embryo includes at least one of magnesium-aluminum-zinc alloy and magnesium-aluminum-manganese alloy; c. The thickness of the magnesium alloy pan blank is 2mm to 5mm; d. The yttrium source is an yttrium-magnesium alloy; e. The yttrium source is an yttrium-magnesium alloy, and the mass fraction of the yttrium element in the yttrium-magnesium alloy is ≥50%; f. the injection time is 20min to 40min; g The thickness of the corrosion-resistant layer is 0.5 μm to 5 μm; h. The porosity of the corrosion-resistant layer is ≤2%. 9. preparation method according to claim 7, is characterized in that, after forming corrosion-resistant layer, described preparation method also comprises the following steps: The non-stick coating is sprayed onto the surface of the corrosion-resistant layer by a spraying process to form a non-stick layer. 10. The preparation method according to claim 9, wherein the non-stick layer has at least one of the following features a to d: a. The spraying process includes at least one of air spraying, high-pressure spraying, electrostatic spraying and low-flow medium-pressure spraying; b. the spraying process is air spraying; c. the non-stick coating includes at least one of ceramic non-stick coating and fluorine coating; d. The thickness of the non-stick layer is 35 μm to 75 μm. 11. The preparation method according to claim 7, characterized in that, the yttrium in the yttrium-magnesium alloy is implanted into the inner surface of the magnesium alloy pan blank in an ionized form by using an ion beam implantation process to form a corrosion-resistant layer, comprising: Preheating the magnesium alloy pan blank to a temperature of 150°C to 250°C, preheating the yttrium magnesium alloy target material to a temperature of 200°C to 250°C, and ionizing the yttrium magnesium alloy target material by arc discharge to form yttrium plasma; In a vacuum environment, the yttrium ion beam formed by the yttrium plasma is injected into the preheated inner surface of the magnesium alloy pot embryo with an implantation voltage of 80KeV to 120KeV, and the implantation time is 20min to 40min, forming the yttrium ion implantation layer ; annealing the magnesium alloy pan blank forming the yttrium ion implantation layer at 250°C to 300°C for 100min to 150min, so that a corrosion-resistant layer with a thickness of 0.5μm to 5μm is formed on the inner surface of the magnesium alloy pan blank, Get cooking utensils.

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