KR101039307B1 - Rust inhibitor composition - Google Patents

Abstract

The present invention relates to a rust preventive composition, and particularly to an anticorrosive composition comprising an oil-based, water-soluble resin, glass powder, an alkali metal compound or an alkaline earth metal compound, an aluminum powder, and a solvent, and a method of forming an anticorrosion coating film using the rust preventive composition. It is about.

The anti-corrosive composition of the present invention can effectively prevent corrosion by passivating the surface of steel sheet, iron plate or concrete and preventing ionization, and its effect is excellent not only in general temperature, humidity and atmospheric conditions, but also in sea water and marine environment. In addition, it has excellent adhesion strength with steel plate, metal plate, or concrete, so it can be attached to old film or rusted steel plate, metal plate, concrete without any treatment, and is environmentally friendly and human-friendly.

Rust inhibitor, steel plate, steel plate, corrosion protection

Description

Antirust agent composition {ANTICORROSIVE COMPOSITION}

The present invention relates to a rust preventive composition, and more particularly, it is possible to passivate the surface of the steel sheet, iron plate, or concrete and to prevent ionization to effectively prevent corrosion, as well as general temperature, humidity, atmospheric conditions, seawater and In addition to its excellent effect in the marine environment, it has excellent adhesion strength with steel plate, metal plate or concrete, so it can be attached to old film, rusted steel plate, metal plate and concrete without any treatment. It relates to a composition and a method of forming a corrosion preventing coating film using the same.

Recently, interest in a method for preventing corrosion of the steel sheet or the iron plate in a product using a steel plate or a steel plate, such as structures, vehicles, home appliances, ships has increased.

In particular, since corrosion in seawater and marine environments is much faster than onshore, failure to properly manage all facilities, vessels, devices, and instruments in contact with the marine environment can lead to inability or accidents at an early or unexpected time. Cause huge losses.

Accordingly, in order to add corrosion resistance and special functions to steel sheets, galvanized steel sheets and various coated steel sheets are manufactured by plating metals of various components such as zinc. However, in such a galvanized steel sheet and various coated steel sheets, rust such as white rust occurs as a metal component such as zinc is exposed to a corrosive environment for a long time.

In order to prevent the occurrence of rust of the galvanized steel sheet as described above, surface treatment using pretreatment agents such as inorganic phosphate and chromate has been performed. Among them, chromate pretreatment has been used as the most excellent in terms of corrosion resistance and economical. That is, chromate prevents oxidation of iron and zinc by the strong self-oxidizing ability of hexavalent chromium, thereby increasing the corrosion resistance of the steel sheet. In addition, chromate treatment has been widely used in the industry as a very economical because of the low processing cost.

However, recently, as the seriousness of health and safety, environmental pollution, and the demand for environmental regulations have increased, the restrictions on the use of harmful ingredients are increasing.

The chromic acid may cause waste cancer to workers due to the strong oxidizing power of chromic acid in the pretreatment process of the steel sheet using the same, and also cause serious water pollution when the wastewater generated in the treatment process is discharged, and thus wastewater treatment cost is increased. Excessive occurrence

Accordingly, while research on products that satisfy the workability and economics while retaining the corrosion resistance of chromium is being conducted, the technologies currently being developed do not exhibit sufficient corrosion resistance effect of the chromate treatment, and the like The effect is also inadequate.                         

In addition, various techniques such as coating using molybdate, which forms an oxide on the surface, forming a hydrated cerium oxide on the surface of the steel sheet using a rare earth metal salt such as CeCl ₂ , thioglycolate, alkoxide coating, etc. In addition, the products have a problem in that the difference in physical properties according to the drying conditions, the drying temperature is very high, and the treatment time of the treatment agent is also deposited in a few minutes in a few minutes.

Therefore, there is a need for further research on a method for minimizing corrosion of steel sheets and reducing maintenance costs of vehicles, home appliances, structures, ships, and marine structures.

In order to solve the problems of the prior art as described above, the present invention does not change the intrinsic properties of the steel sheet, metal plate, or concrete, and passivates the surface of the steel plate, metal plate, or concrete and prevents ionization to effectively prevent corrosion. In addition to the general temperature, humidity, and atmospheric conditions, as well as to provide an anticorrosive composition excellent in the anti-corrosion effect in sea water and marine environments, and a method of forming an anti-corrosion coating film using the same.

Another object of the present invention is excellent adhesion strength with steel plate, metal plate, or concrete can be attached to the old film or rusted steel plate, metal plate, concrete without any treatment, environmentally friendly and human-friendly anti-corrosive composition and corrosion using the same It is to provide a method of forming a protective coating film.

Another object of the present invention is applied to a steel plate, a metal plate, or concrete used in vehicles, home appliances, buildings or structures, ships, offshore structures, munitions, etc. to prevent corrosion effectively to reduce the maintenance cost It is to provide a composition and a method of forming a corrosion preventing coating film using the same.

In order to achieve the above object, the present invention provides a rust inhibitor composition,

a) 100 parts by weight of an oil-based, water-soluble resin;

b) 10 to 500 parts by weight of the glass powder;

c) 0.1 to 10 parts by weight of an alkali metal compound or an alkaline earth metal compound;

d) 0.1 to 50 parts by weight of aluminum powder; And

e) 100 to 500 parts by weight of solvent

It provides a rust preventive composition comprising a.

In another aspect, the present invention provides a method of forming an anti-corrosion coating film, characterized in that the coating of the rust preventive composition on a steel sheet, a metal plate, or concrete.

Hereinafter, the present invention will be described in detail.

The anti-corrosive composition of the present invention is characterized in that it contains an oil-based, water-soluble resin, glass powder, an alkali metal compound or an alkaline earth metal compound, an aluminum powder, and a solvent.

Preferably, the present invention

A) iii) 100 parts by weight of an oil-based, water-soluble resin;

   Ii) 10 to 500 parts by weight of glass powder;                     

   Iii) 0.1 to 10 parts by weight of an alkali metal compound or an alkaline earth metal compound;

   Iii) 100 to 500 parts by weight of solvent

   Subjects containing, and

B) Subsidiary containing 0.1 to 50 parts by weight of aluminum powder

It will be a two-part containing.

The oil-based and water-soluble resin of a) used in the present invention is a component that acts as a binder of the anti-corrosive composition of the present invention, as well as acrylic resins, urethanes, alkyds, polyesters, and polyvinyl chlorides. Emulsions of various aqueous resins may also be used.

The epoxy resin is preferably an epoxy resin for solvent dilution having a molecular weight in the range of 350 to 3,000 MW among diglycidyl and triglycidyl types.

The acrylic resin is preferably a solvent-type acrylic urethane, an aqueous acrylic hydrosol, an emulsion-solvent-free acrylic silane, or an ultraviolet curable acryl based on methacrylic acid derivatives.

The urethane resin is a polyurethane resin or urethane prepolymers such as polyurethanes, urethane propolymers, etc., formed by polymerization of various organic polyisocyanates with polyhydric hydroxy compounds. Emulsions of hydrophilic groups are preferred.

The alkyd based resin is preferably an alkyd resin in the form of a coating modified with a polybasic acid and a polyhydric alcohol ester compound, and includes rosin, phenol, epoxy, and vinyl styrene monomer. Alkyd resins modified with isocyanate, silicon, or the like can also be used.

The polyvinyl chloride system preferably uses a plastic sol resin of PVC.

The resin may be included in the form of a liquid by mixing with a solvent before the rust preventive composition of the present invention is mixed, one-component, two-component, three-component, or emulsion type may be used depending on the type of resin, as well as curing accelerators May be added.

These oil- and water-soluble resins impart various chemical resistances such as acid resistance and alkali resistance, depending on the characteristics of the various resins.

If the content of the oil-based, water-soluble resin is too low, there is a problem that the adhesion to the steel sheet, iron plate, or concrete to which the rust-preventive composition of the present invention is applied, there is a problem, if the content is too high hardness, strength, and other There exists a problem that the physical property as a rust preventive agent worsens.

The glass powder of b) used in the present invention increases the strength and viscosity of the rust preventive composition to increase impact resistance and tensile strength, and inhibits volume expansion due to curing shrinkage and temperature rise. Do it.

The glass powder may be used in a variety of particle shapes and particle sizes, the particles of the glass powder is obtained by pulverizing glass, cullet, glass fiber, or glass curette, glass composition is A, C, E, alkali resistance It will not specifically limit, if it is compatible with resin, such as a glass powder composition, Especially, the glass powder of E-glass composition is more preferable at the point of adhesiveness of various base materials.

Although the particle diameter of the said glass powder is not specifically limited, It is preferable that it is 10 micrometers-1 mm especially, More preferably, it is 5 micrometers-0.1 mm. In addition, since the rust preventive composition of the present invention penetrates to the fine part of the steel sheet, iron plate, or concrete and completely prevents rust, it is preferable to use the glass powder having the smallest possible particle size. If the particle diameter of the glass powder is too small, the viscosity of the rust preventive composition may be greatly increased. If the glass powder is too large, the penetrating action to the steel sheet, the iron plate, or the concrete fine part is reduced, so that the strength of the rust preventive composition is reduced, or the shrinkage and expandability are increased. This can increase.

The glass powder may be used in a large amount in the rust preventive composition because it does not absorb the resin or water, in particular, even if the content of the glass powder is high, the mixing and dispersion in the resin is good and the volume filling effect is very excellent.

In particular, the glass powder is preferably contained in 10 to 500 parts by weight based on 100 parts by weight of the oil-based, water-soluble resin. If the content is less than 10 parts by weight, there is a problem that shrinkage and expansion may increase. If the content is more than 500 parts by weight, the viscosity passes, and the content of oily and water-soluble resins is relatively decreased, thereby decreasing the adhesion of the rust inhibitor composition. There is a problem that can be. In addition, when the anti-corrosive composition of the present invention is used by dividing the subject and the subsidiary, the glass powder may be included in the subject and the subsidiary in appropriate amounts, and in particular, it is preferable to include 10 to 490 parts by weight in the subject and the subsidiary, respectively.

Alkali metal-based compound or alkaline earth metal-based compound of c) used in the present invention is alkaline and passivated by alkalizing the steel sheet, iron plate, or concrete surface to which the anti-corrosive composition of the present invention is coated, and also alkali metal-based compound or alkaline earth metal-based compound The compound serves as an anode of the battery and prevents the ionization of iron, thereby preventing corrosion of the steel sheet, the steel sheet, or the concrete.

The alkali metal compound or alkaline earth metal compound may be an alkali metal compound or beryllium containing lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), or francium (Fr). An alkaline earth metal compound containing Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), or radium (Ra) can be used. Preferably, an alkali metal compound is preferable, especially NaCl or KCl.

The alkali metal compound or alkaline earth metal compound may be adjusted in accordance with the required degree of foaming, and of course, it is particularly preferably included in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the oil-based, water-soluble resin. If the content is within the above range, it is better for alkalizing and corrosion prevention of the iron surface.

The aluminum powder of d) used in the present invention serves to block the penetration of water or oxygen into the steel sheet, iron plate, or concrete to which the anti-corrosive composition of the present invention is coated.

The aluminum powder is preferably contained in 0.1 to 50 parts by weight based on 100 parts by weight of the oil-based, water-soluble resin. If the content is in the above range, it is better to block the penetration of water or oxygen into the steel sheet, iron plate, or concrete.

In addition to the above components, the rust preventive composition of the present invention includes a solvent, and the content thereof is preferably included in an amount of 100 to 500 parts by weight based on 100 parts by weight of the oily and water-soluble resin.

The solvent may be either an oil solvent or an aqueous solvent, and most preferably water.

The rust preventive composition of the present invention comprising the above components may further comprise glass beads.

The glass beads improve the flowability and injectability of the rust inhibitor composition by the ball bearing effect to penetrate into fine parts of steel sheets, steel sheets, or concrete, and provide excellent dispersibility for other additives. . In addition, the mixture of the resin and the glass beads exhibits excellent storage properties that are well mixed by simple stirring even after long-term storage, and serves to improve impact resistance by absorbing and dispersing shock from the outside.

The glass beads may be spherical, elliptical, or glass beads of any shape equivalent thereto, and may be used, from those in which various sizes are distributed to those of only a predetermined size.

The particle diameter of the glass beads may be appropriately selected and used according to the use of the steel sheet, iron plate, or concrete, and preferably 1 μm to 1 mm. They can also exhibit a variety of shapes and properties by the combination of beads having a small particle size of several μm and a large particle size of several mm. However, when the particle size exceeds 1 mm, the dispersibility is low and cannot be used efficiently.

The glass beads may be used by changing the type and amount of the steel sheet, iron plate, or concrete coated with the anti-corrosive composition, and the type and amount of the resin used, in particular 100 parts by weight of the oil-based and water-soluble resin. It is preferably included 10 to 500 parts by weight, more preferably 10 to 300 parts by weight. When the content is in the above range, it is better in improving the fluidity of the rust-preventing composition and in improving the strength and hardness after curing. In addition, when the anti-corrosive composition of the present invention is used separately in the subject and the subtitle, the glass beads may be divided into appropriate amounts and included as the subject and the subtitle.

In addition, the rust preventive composition of the present invention may further include a glass fiber (glass fiber) as needed. The glass fiber acts to increase the tensile strength and crack resistance of the cured rust inhibitor.

The glass fiber may be a long glass fiber of the E composition or a fiber of an alkali resistance composition, specifically, a chopped fiber obtained by cutting a glass fiber or carbon fiber having a fiber diameter of 10 to 20 ㎛ in a uniform strand length ) Or milled fibers prepared by milling to an average fiber length can be used. In particular, the chopped fibers are preferably cut to a fiber length of about 2 to 12 mm, and the pulverized fibers preferably have an average fiber length of 10 to 300 m. In particular, the pulverized fiber is preferable when considering the tensile strength reinforcement and dispersibility of the rust preventive agent, and may be used by mixing the chopped fiber and the pulverized fiber.

The glass fiber is preferably contained in 1 to 100 parts by weight with respect to 100 parts by weight of the oil-based, water-soluble resin. When the content of the glass fiber is within the above range, there is an advantage that the tensile strength of the cured rust preventive agent is excellent and cracks, shrinkage, and expansion do not occur. In addition, when the anti-corrosive composition of the present invention is used by dividing the subject and the subtitle, the glass fiber may be included in the subject and the subtitle by dividing the appropriate amount, and in particular, it is preferable to include 10 to 90 parts by weight in the subject and the subsidiary, respectively.

In addition, the anti-corrosive composition of the present invention may further include a curing agent, the curing agent of course can use all of the usual curing agents, it is particularly preferable to use an epoxy curing agent.

The curing agent is preferably included in 10 to 100 parts by weight with respect to 100 parts by weight of the oil-based, water-soluble resin, it is more preferable for the curing of the rust preventive agent if the content is in the above range.

In addition, the rust inhibitor composition of the present invention may further include additives such as fillers, pigments, reaction catalysts, water repellents, crosslinking agents, and the like.                     

The anti-corrosive composition of the present invention comprising the above components is passivated by alkalizing the surface of the steel sheet, iron plate, or concrete to which the anti-corrosive composition is coated with a basic composition, and the components of the anti-corrosive composition of the present invention are used in the steel plate, the iron plate, or the concrete. It is an anode to prevent the ionization of iron, there is an advantage that can prevent corrosion by blocking the penetration of water or oxygen into the steel sheet, iron plate, or concrete. In addition, the anti-corrosive composition of the present invention can effectively prevent corrosion by passivating the surface and preventing ionization without changing the intrinsic properties of the steel sheet, steel sheet, or concrete, as well as general temperature, humidity, atmospheric conditions It is not only excellent in the seawater and marine environment, but also has excellent adhesion strength with steel plate, metal plate, or concrete, so it can be attached to old film, rusted steel plate, metal plate, concrete without any treatment, and is environmentally friendly Friendly.

In another aspect, the present invention provides a method for forming an anti-corrosion coating film, characterized in that the coating of the anti-corrosive composition to the steel plate, iron plate, or concrete surface, the formation of the anti-corrosion coating film on the steel plate, iron plate, or concrete surface It can be formed by uniformly coating and curing the rust inhibitor composition.

Coating of the rust preventive composition may be carried out by conventional methods used in the art, and specifically, brush coating, spray coating, roller coating, or the like may be used.

The anti-corrosion coating film formed as described above may adjust the thickness in consideration of the material, performance, use, structure, environmental conditions, etc., the steel plate, metal plate, or concrete is coated with the rust preventive agent, in particular steel plate, metal plate, or concrete It is preferable that the surface is coated with a thickness of 10 μm to 1 mm, more preferably 100 to 500 μm.

Formation of the anti-corrosion coating as described above is used for steel appliances, vehicles, bridges, buildings or structures, marine structures such as ships, docks, ports, docking facilities, munitions such as water or underwater vessels, such as steel plates or steel plates or concrete is used Of course, it can be applied to various places, and in particular, it is easy to apply in sea water and marine environment in contact with the sea or underwater.

In addition, the method of forming the anti-stick coating film is applied to the surface of the steel sheet or steel plate to prevent the anti-corrosion composition to strengthen the strength of the parent, and adheres to the excellent adhesion strength to cure while complementing the tensile strength of the mother to effectively re-crack or corrosion It can be prevented, and can be easily attached to an old film, a rusted steel sheet, or an iron plate without a separate pretreatment coating.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the scope of the present invention is not limited to the following examples.

[Example]

Example 1

1 kg of a mixture of 500 g of epoxy resin and 500 g of water was uniformly mixed with 1 kg of glass powder having an average particle size of 200 mesh and specific gravity of 2.54, an alkali metal compound or an alkaline earth metal compound, 5 g of NaCl, and 1 kg of water. The subject was prepared by mixing.

Then, 10 g of aluminum powder was uniformly mixed with aluminum powder to prepare a subtitle.

The anticorrosive composition was prepared by mixing the main ingredient and the subsidiary prepared as described above.

Then, the anticorrosive composition prepared as described above is coated on a steel plate having a width of 20 cm × 30 cm × 5 cm to a thickness of 400 μm to form an antifouling coating film, and a large amount of oxygen and moisture are formed on the steel sheet on which the antifouling coating film is formed. It was exposed to corrosive environment for one week and the degree of corrosion was observed. At this time, a steel sheet not coated with the rust preventive composition was used as a comparative example.

As a result, the steel sheet having the anti-corrosion coating film coated with the anti-corrosive composition according to the present invention was coated even to a minute portion of the steel sheet, and the corrosion degree was extremely small, but the steel sheet without the anti-corrosive composition exhibited corrosion while generating bubbles. In addition, it was confirmed that the steel sheet on which the antifouling coating film was formed according to the present invention was stably attached to the rust preventive composition without falling off.

Example 2

In Example 1, except that 300 g of glass beads having an average particle size of 0.1 mm was further added to the main body and the subsidiary agent, the main body and the subsidiary material were prepared and mixed in the same manner as in Example 1 to prepare a rust preventive composition.

In addition, the degree of corrosion prevention was observed in the same manner as in Example 1 using the anti-corrosive composition prepared as described above, and showed the same corrosion protection effect as Example 1, in particular Example 1 and In comparison, it was confirmed that the dispersibility was excellent and the strength was increased.

Example 3

In the same manner as in Example 1, except that 100 g of crushed glass fiber having an average fiber thickness of 13.5 μm and an average fiber length of 300 μm was added to the main material in Example 1, a main body and a subsidiary were prepared and mixed to prevent rust inhibitors. The composition was prepared.

In addition, using the anti-corrosive composition prepared as described above to observe the degree of corrosion protection in the same manner as in Example 1, showed an anticorrosion effect equivalent to that of Example 1, in particular compared to Example 1 It was confirmed that the tensile strength was significantly improved.

Example 4

In Example 1, 300 g of glass beads having an average particle size of 0.1 mm and 100 g of pulverized glass fiber having an average fiber thickness of 13.5 μm and an average fiber length of 300 μm were further added to the main body, except that the additives were used as a subtitle. In the same manner as in Example 1, the addition of 300 g of glass beads having an average particle size of 0.1 mm to the main body and the subsidiary was prepared and mixed to prepare a rust preventive composition.

In addition, using the anti-corrosive composition prepared as described above to observe the degree of corrosion protection in the same manner as in Example 1, showed an anticorrosion effect equivalent to that of Example 1, in particular compared to Example 1 It was confirmed that the dispersibility, strength, and tensile strength were all improved.

The anti-corrosive composition according to the present invention is basically passivated by alkalizing the surface of the steel sheet or iron plate coated with the anti-corrosive composition, and one of the components of the anti-corrosive composition of the present invention in the steel plate, metal plate, or concrete becomes the positive electrode of the battery and ionizes the iron. And prevents corrosion by preventing the penetration of water or oxygen into the steel sheet, metal plate, or concrete. In addition, the anti-corrosive composition of the present invention can effectively prevent corrosion without changing the intrinsic properties of steel sheets, metal plates, or concrete, and its effect is not only in general temperature, humidity, and atmospheric conditions, but also in seawater and marine environments. Not only is it excellent, it also has excellent adhesion strength with steel plate, metal plate, or concrete, so it can be attached to old film or rusted steel plate, metal plate, concrete without any treatment, and is environmentally friendly and human-friendly.

In addition, the method of forming an anti-stick coating film according to the present invention is applied to the surface of the steel sheet, metal plate, or concrete to strengthen the strength of the parent, can penetrate to the minute portion of the steel sheet can exhibit a perfect rust preventive effect. In addition, it adheres with excellent adhesion strength and hardens while supplementing the tensile strength of the mother, thereby effectively preventing re-cracking and corrosion, and having an effect of significantly reducing maintenance costs.

Claims (12)

In the rust inhibitor composition, a) 100 parts by weight of an oil-based, water-soluble resin; b) 10 to 500 parts by weight of the glass powder having a particle diameter of 10 μm to 1 mm; c) 0.1 to 10 parts by weight of an alkali metal compound or an alkaline earth metal compound; d) 0.1 to 50 parts by weight of aluminum powder; And e) 100 to 500 parts by weight of solvent Anticorrosive composition comprising a. A) iii) 100 parts by weight of an oil-based, water-soluble resin;    Ii) 10 to 500 parts by weight of glass powder;    Iii) 0.1 to 10 parts by weight of an alkali metal compound or an alkaline earth metal compound;    Iii) 100 to 500 parts by weight of solvent    Subjects containing, and B) Subsidiary containing 0.1 to 10 parts by weight of aluminum powder Anti-corrosive composition comprising a. The method of claim 1, The oil- and water-soluble resin of a) is an epoxy resin, an acrylic resin, a urethane resin, an alkyd resin, a polyester resin, or a polyvinyl chloride resin. delete The method of claim 1, The alkali metal compound or alkaline earth metal compound of c) is lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), francium (Fr), beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and radium (Ra) is an alkali metal compound or an alkaline earth metal compound selected from the group consisting of at least one antirust agent composition. The method of claim 1, The rust preventive composition further comprises a glass bead (glass bead) having a particle diameter of 1 μm to 1 mm in an amount of 10 to 500 parts by weight based on 100 parts by weight of the oil-based and water-soluble resin. The method of claim 1, The rust preventive composition may be a chopped fiber obtained by cutting a glass fiber or carbon fiber having a fiber diameter of 10 to 20 μm into a uniform strand length, or a milled fiber obtained by grinding the average fiber length to 10 to 300 μm. ) 1 to 100 parts by weight based on 100 parts by weight of the oil-based, water-soluble resin further comprises a rust preventive composition. The method of claim 1, The rust preventive composition further comprises an epoxy-based curing agent 10 to 100 parts by weight based on 100 parts by weight of the oil-based, water-soluble resin. The method of claim 1, The rust preventive composition further comprises an additive selected from the group consisting of fillers, pigments, reaction catalysts, water repellents, and crosslinking agents. A method for forming a corrosion preventing coating film, comprising coating the rust inhibitor composition according to any one of claims 1 to 3 and 5 to 9 on the surface of a steel sheet or an iron plate. The method of claim 10, The anti-corrosive composition is a method of forming an anti-corrosion coating, characterized in that the coating on the surface of the steel sheet or iron plate with a thickness of 10 ㎛ to 1 mm. The method of claim 10, The anti-corrosion coating film is a method of forming an anti-corrosion coating, characterized in that for household appliances, vehicles, piers, buildings or structures, ships, docks, ports, docking facilities, marine structures, or water or underwater vessels.