CN115368951A

CN115368951A - High-temperature-resistant copper-based anti-tightening agent

Info

Publication number: CN115368951A
Application number: CN202210941382.2A
Authority: CN
Inventors: 龚航
Original assignee: Nobein Chemical Co ltd
Current assignee: Nobein Chemical Co ltd
Priority date: 2022-08-08
Filing date: 2022-08-08
Publication date: 2022-11-22

Abstract

The invention discloses a high-temperature-resistant copper-based anti-corrosion agent which is prepared from the following components in percentage by mass: 10-30% of extreme pressure antifriction agent; 5-15% of specially-made element metal micro-balls; 10-18% of high-temperature resistant oxidant; 2-8% of corrosion inhibitor; 1-5% of a lubricant; adding synthetic base oil to 100%; the extreme pressure antiwear agent is prepared by mixing an antiwear agent and a friction reducing agent in a weight ratio of 1: (0.2-0.5) by weight; the corrosion inhibitor is selected from one or more of heptadecenyl imidazoline alkenyl succinate, zinc naphthenate and dinonyl naphthalene barium sulfonate; the metal micro-ball consists of brass, red copper and nickel powder in a weight ratio of 1: (0.5-0.9): (1.5-2.0) in terms of mass ratio. The high-temperature-resistant copper-based anti-seize agent can provide solid isolation lubrication under the condition of extremely high temperature of 1300 ℃, and can provide permanent anti-corrosion sealing lubrication protection.

Description

High-temperature-resistant copper-based anti-tightening agent

Technical Field

The invention relates to the field of metal protection, in particular to a high-temperature-resistant copper-based anti-corrosion agent.

Background

The anti-compact corrosion product can form a protective coating which can bear extremely high temperature and is not easy to wash and burn on the metal surface, has excellent waterproof, antirust, anti-corrosion and anti-fretting wear characteristics on metal parts, needs to form solid dry film lubrication in an environment higher than 200 ℃, and plays roles of lubrication and metal sintering seizure prevention at the temperature of 1400 ℃. For example, the tolerance diameters of the bolts are not matched, so that most of the bolts are welded with brute force during assembly, and the conditions that the sealing materials of the flange and the valve are dissolved or cracked under the action of material corrosion and high-temperature corrosion to cause difficulty in disassembly and the like can be solved by using the anti-corrosion product.

In the case of a bolt, although the bolt is small, the amount of the bolt used in one project is enormous. For example, the Qinghai-Tibet railway has the total length of 1956 kilometers and the duration of 1958 years to 2006 lasts for 46 years; the railway is a plateau railway with the highest altitude and the longest frozen soil distance in the world and is known as a sky road; the project of selecting one hundred years of the world in 09 months in 2013 is a public praise in the history of railways in the world; more than 800 bolts of the Tibet railway are screwed by a professional tool for 6 seconds; the anti-sticking agent has the effects of boosting and preventing the skid; every 1 second, 93 days can be saved. If a bolt is tightened without professional maintenance, 50% of the torque is used to overcome the friction between the bolt head and the ground, 40% of the torque is used to overcome the friction of the thread pair, and only 10% of the torque is converted into clamping force.

The common anti-seizing agent adopts zinc, lead, aluminum, graphite powder, molybdenum disulfide and other substances, the materials can generate fusion, oxidation, coking and corrosion phenomena when the temperature is higher than 300 ℃, and the materials cannot resist high temperature, so that the use scene and the performance of anti-tight corrosion products are limited, and increasingly complex working environments are difficult to meet. Therefore, further improvement is desired.

Disclosure of Invention

In order to improve the temperature resistance of an anti-corrosion product, the application provides a high-temperature-resistant copper-based anti-corrosion agent.

In a first aspect, the application provides a high-temperature-resistant copper-based anti-seize agent, which is prepared from the following components in percentage by mass:

10-30% of extreme pressure antifriction agent;

5-15% of specially-made element metal micro-balls;

10-18% of high-temperature resistant oxidant;

2-8% of corrosion inhibitor;

1-5% of a lubricant;

adding synthetic base oil to 100%;

the extreme pressure antiwear agent is prepared from an antiwear agent and a friction reducing agent in a weight ratio of 1: (0.2-0.5) by weight;

the corrosion inhibitor is selected from one or more of heptadecenyl imidazoline alkenyl succinate, zinc naphthenate and dinonyl naphthalene barium sulfonate;

the metal micro-ball consists of brass, red copper and nickel powder in a weight ratio of 1: (0.5-0.9): (1.5-2.0) in terms of mass ratio.

The synthetic base oil does not coke, carbonize and cement metal at high temperature, and the synthetic base oil containing the synthetic base oil is completely volatilized to form metal copper powder which is not fused with iron, so that the workpieces are prevented from being sintered, corroded, tightly corroded, rusted and abraded.

The common anti-seizing agent adopts zinc, lead, aluminum, graphite powder, molybdenum disulfide and other substances, the materials can generate fusion, oxidation, coking and corrosion phenomena at the temperature of more than 300 ℃, and the anti-seizing agent contains a specially-made copper metal micro ball, can provide solid isolation lubrication action at the extremely high temperature of 1300 ℃, and effectively protects metal parts from being sintered and seized. Especially, the sealing materials of the flange and the valve are dissolved or cracked under the action of material corrosion and high-temperature corrosion to cause difficult disassembly, and the sealing materials are coated during assembly to provide permanent anticorrosion sealing lubrication protection

Preferably, the lubricant is extreme pressure complex lithium-based grease or bentonite lithium-based grease.

Preferably, the metal micro ball is processed by adopting an atomization process, molten metal copper material is introduced with high-pressure inert gas, and the metal material is subjected to spherical atomization by adopting injection and then cooled.

Preferably, the corrosion inhibitor is prepared from heptadecenyl imidazolinyl alkenyl succinate, zinc naphthenate and dinonyl barium naphthalene sulfonate in a weight ratio of 1: (2-7): (0.5-4) in weight ratio.

Preferably, the weight ratio of the heptadecenyl imidazolinyl succinate to the zinc naphthenate to the barium dinonyl naphthalenesulfonate is 1: (3-5): (2.5-3).

The loosened and rusted valve and bolt can generate a fire source and meet the condition of the bolt entering the body and being blind, so that the disease is not cured as much as the disease is prevented, and the integration of treatment and prevention is achieved. Can prevent the corrosion caused by moisture, steam, salt water spraying and water scouring.

After the synthetic base oil is completely volatilized, metal copper beads which are not fused with iron are deposited, and the workpieces are prevented from being sintered, corroded, tightly corroded, rusted and abraded. The special copper metal micro ball is matched with the components to provide solid isolation lubrication at the extreme temperature of 1300 ℃, so that metal parts are effectively protected from being sintered and stuck; the centralized assembling work of the petrochemical flange plate and the railway track bolt is facilitated, and the bolt is assembled in the injection screw hole. The tolerance diameter of the bolt is not matched, so that most of the bolts are welded by brute force during assembly, friction can be reduced, screw thread sliding is prevented, the connecting piece is fastened, and the total bolt assembly time can be saved by 30%.

Preferably, the antiwear agent is selected from one or more of tricresyl phosphate, amine thiophosphate salt and octadecyl amine isooctyl acid phosphate salt.

Preferably, the antiwear agent is a mixture of tricresyl phosphate, amine thiophosphate salt and isooctyl acid phosphate ester octadecylamine salt in a weight ratio of 10: (1-3): (6-10) mass ratio.

Preferably, the friction reducer is epoxy oleate or organo-molybdenum.

Preferably, the organo molybdenum is a molybdenum dialkyl dithiophosphate or a molybdenum dialkyl dithiocarbamate.

If the addition amount of the extreme pressure anti-wear agent is less than the addition amount, the components of the small extreme pressure anti-wear agent can not effectively resist extreme pressure wear caused by load in the working process; if the addition amount of the extreme pressure anti-wear agent is more than that of the extreme pressure anti-wear agent, most of the extreme pressure anti-wear agents contain partial sulfur, so that the extreme pressure anti-wear performance of the anti-corrosion agent cannot be effectively improved by adding too much extreme pressure anti-wear agent, and the metal is corroded and damaged by too much sulfur. Therefore, the extreme pressure anti-wear agent and the additive amount can ensure that the anti-seizing agent can well play a role in resisting wear.

Preferably, the antioxidant is selected from any one of dialkyldiphenylamine, dialkyldithiocarbamate ZDTC and ZDDP.

Preferably, the antioxidant is a mixture of dialkyldiphenylamine, dialkyldithiocarbamate ZDTC and zinc dialkyldithiophosphate ZDDP in a ratio of 10: (0.3-0.8): (1-2.8) in terms of mass ratio.

In conclusion, the micro ball containing the specially-made copper metal is matched with the components to provide a solid isolation lubricating effect at the extreme temperature of 1300 ℃, so that metal parts are effectively protected from being sintered and stuck; the centralized assembling work of the petrochemical flange plate and the railway track bolt is facilitated, and the bolt is assembled in the injection screw hole. The tolerance diameter of the bolt is not matched, so that most of the bolts are welded by brute force during assembly, friction can be reduced, screw thread sliding is prevented, the connecting piece is fastened, and the total bolt assembly time can be saved by 30%.

Detailed Description

Preparation example

Preparation example 1

The preparation example discloses a preparation method of a specially-made element metal micro ball, which comprises the following steps:

brass, red copper and nickel powder (mass ratio 1.5 ^-2 ～10 ⁰ Under the vacuum state of Pa, nitrogen is filled into the smelting chamber and the atomizing tank, the gas pressure is 1atm, the materials are melted by a resistance heating or induction heating mode, the melt reaches the superheat degree of 100-300K), the metal melt is transferred from the smelting crucible to the heat-insulating crucible, and the metal melt forms jet flow through a flow guide nozzle at the bottom of the heat-insulating crucible under the drive of positive pressure; the metal melt jet meets the supersonic gas jet surrounding the flow guide nozzle, and the metal melt jet is atomized into metal droplets under the impact of the supersonic gas flow; the metal liquid drops generate violent heat exchange with high-speed airflow when flying in the atomization tank body, are quickly solidified and cooled into powder, and are further cooled to room temperature in a powder collector; and classifying the powder by using screening equipment such as a vibrating screen to obtain the specially-made element metal micro ball with the average grain diameter of 50 mu m.

Preparation example 2

The difference from the preparation example is that the mass ratio of the brass to the red copper to the nickel powder is 1: 0.9:2.0.

examples

Example 1

The embodiment discloses a high-temperature-resistant copper-based anti-seize agent, which is prepared by the following steps:

step 1), adding base oil (487.7 g of liquid paraffin and 271g of triethanolamine borate) and a lubricant (10 g of extreme pressure composite lithium base grease of NOBEIN) into a stirring kettle, heating to 160 ℃ while stirring, uniformly stirring, and cooling to 60 ℃ to obtain the base oil.

Step 2), adding an extreme pressure antifriction agent (83.3 g of tricresyl phosphate as an antiwear agent and 16.7g of molybdenum dialkyldithiophosphate as a antifriction agent), the specially-prepared element metal micro-balls prepared in the preparation example 1 (50 g of brass, 25g of red copper and 75g of nickel powder), a high temperature resistant oxidant (159.3 g of dialkyldiphenylamine, 5.9g of dialkyldithiocarbamate and 20.6g of zinc dialkyldithiophosphate) and an anticorrosive rust agent (20 g of heptadecenyl imidazolinyl alkenyl succinate) into base oil, heating to 60 ℃, and stirring and dispersing for 30min at a revolution stirring speed of 40rpm and a dispersion stirring speed of 1500 rpm.

And 3) after passing through a three-roller machine for 2 times, vacuumizing to-0.4 Mpa, setting the revolution stirring speed to be 20rpm, and degassing for 20min to prepare the high-temperature-resistant copper-based anti-corrosion agent.

Example 2

step 1), adding base oil (420.2 g of liquid paraffin and 233.4g of triethanolamine borate) and lubricant (50 g of NOBEIN extreme pressure composite lithium base grease) into a stirring kettle, heating to 160 ℃ while stirring, uniformly stirring, and cooling to 60 ℃ to obtain the base oil.

And 2) adding an extreme pressure anti-wear agent (200 g of tricresyl phosphate as an anti-wear agent and 100g of molybdenum dialkyl dithiophosphate as an anti-wear agent), the specially-prepared element metal micro-balls (12.8 g of brass, 11.5g of red copper and 25.6g of nickel powder) prepared in the preparation example 1, a high temperature resistant oxidant (73.5 g of dialkyl diphenylamine, 11.5g of dialkyl dithiocarbamate and 25.6g of zinc dialkyl dithiophosphate) and an anti-corrosion rust agent (80 g of heptadecenyl imidazoline alkenyl succinate) into base oil, heating to 60 ℃, and stirring and dispersing for 30min at a revolution stirring speed of 40rpm and a dispersion stirring speed of 1500 rpm.

And 3) after passing through a three-roller machine for 2 times, vacuumizing to-0.4 Mpa, setting the revolution stirring speed at 20rpm, and degassing for 20min to prepare the high-temperature-resistant copper-based anti-corrosion agent.

Example 3

This example discloses a high temperature resistant copper-based anti-seizing agent, which is different from example 2 in that: the corrosion inhibitor is heptadecenyl imidazoline alkenyl succinate, zinc naphthenate and dinonyl naphthalene barium sulfonate salt, wherein the ratio of 1:2:0.5, namely 22.8g of heptadecenyl imidazolinyl succinate, 45.7g of zinc naphthenate and 11.4g of barium dinonyl naphthalenesulfonate.

Example 4

This example discloses a high temperature resistant copper-based anti-seizing agent, which is different from example 2 in that: the corrosion inhibitor is heptadecenyl imidazoline alkenyl succinate, zinc naphthenate and dinonyl naphthalene barium sulfonate salt, wherein the ratio of 1:7:4, namely 6.7g of heptadecenyl imidazolinyl succinate, 46.7g of zinc naphthenate and 26.7g of barium dinonyl naphthalenesulfonate.

Example 5

This example discloses a high temperature resistant copper-based anti-corrosive agent, which is different from example 2 in that: the corrosion inhibitor is heptadecenyl imidazoline alkenyl succinate, zinc naphthenate and dinonyl naphthalene barium sulfonate salt, wherein the ratio of 1:3:2.5, namely 12.3g of heptadecenyl imidazolinyl succinate, 36.9g of zinc naphthenate and 30.8g of barium dinonyl naphthalenesulfonate.

Example 6

This example discloses a high temperature resistant copper-based anti-corrosive agent, which is different from example 2 in that: the corrosion inhibitor is heptadecenyl imidazoline alkenyl succinate, zinc naphthenate and dinonyl naphthalene barium sulfonate salt, wherein the ratio of 1:5:3, namely 8.9g of heptadecenyl imidazolinyl succinate, 44.4g of zinc naphthenate and 26.7g of barium dinonyl naphthalenesulfonate.

Comparative example

Comparative example 1

The difference from example 2 is that nickel powder of equal mass is used instead of red copper.

Comparative example 2

The difference from example 2 is that equal mass of nickel powder is used instead of brass.

Comparative example 3

The difference from example 2 is that red copper of equal mass is used instead of nickel powder.

Comparative example 4

The difference from example 2 is that the mass ratio of brass, red copper and nickel powder is 1:0.4:1.2.

performance test

1. The test items and methods are summarized in Table 1.

TABLE 1

2. The test results are summarized in Table 2.

TABLE 2

Test item	Example 1	Example 2	Example 3	Example 4	Example 5	Example 6	Comparative example 1	Comparative example 2	Comparative example 3	Comparative example 4
											Sintering load value/kgf	1000	1000	1200	1200	1300	1300	800	800	600	800
Steel mesh fraction oil/%)	1.1	1.1	0.9	0.9	0.8	0.8	1.4	1.8	1.3	1.4
											Oxidation stability/kPa	0.33	0.32	0.30	0.30	0.29	0.29	0.36	0.37	0.36	0.36
Damp-heat test of rust-proof grease	Class A	Class A	Class A	Class A	Class A	Class A	Class A	Class A	Class A	Class A
											Starting torque (-60 ℃)/mN x m	826	854	964	971	983	985	806	784	800	810
Kinematic torque (-60 ℃)/mN x m	257	263	272	276	284	280	230	235	237	240
											1300 ℃ sintering load value/kgf	415	410	435	440	460	460	260	267	270	286
Penetration of working cone, 0.1mm	307	306	307	309	310	311	307	308	307	306
											Roller stability of 0.1mm	+13	+13	+13	+13	+13	+13	+8	+7	+8	+8
Dropping Point/. Degree.C	＞330	＞330	＞330	＞330	＞330	＞330	＞330	＞330	＞330	＞330

As can be seen from the data in table 2, the anti-corrosion agents of examples 1 to 6 have excellent high and low temperature performance, mechanical stability, oxidation stability, colloid stability, extreme pressure anti-wear property and anti-rust and anti-corrosion performance, and meet the anti-corrosion requirements in ultra-high temperature and wide temperature range, and compared with the detection data of comparative examples 1 to 4, the detection data are all in a better degree.

The above-described embodiments are merely preferred embodiments of the present invention, which are intended to illustrate the present invention and not to limit the scope of the present invention. The title of the invention has been described with specific examples. The invention is not limited to the specific embodiments shown and described, but rather, various modifications can be made without departing from the scope of the invention.

Claims

1. The high-temperature-resistant copper-based anti-seize agent is characterized by being prepared from the following components in percentage by mass:

10-30% of extreme pressure antifriction agent;

5-15% of specially-made element metal micro-balls;

10-18% of high-temperature resistant oxidant;

2-8% of corrosion inhibitor;

1-5% of a lubricant;

adding synthetic base oil to 100%;

the anti-corrosive rust agent is selected from one or more of heptadecenyl imidazoline alkenyl succinate, zinc naphthenate and barium dinonyl naphthalene sulfonate;

2. The high temperature resistant copper-based anti-seize agent according to claim 1, wherein: the lubricant is extreme pressure composite lithium-based grease or bentonite lithium-based grease.

3. The high temperature resistant copper-based anti-seize agent according to claim 1, wherein: the metal micro ball is processed by adopting an atomization process, a metal copper material is melted, high-pressure inert gas is introduced, the metal material is subjected to spherical atomization by adopting injection, and then the metal material is cooled.

4. The high temperature resistant copper-based anti-galling agent of claim 1, wherein: the corrosion inhibitor is prepared from heptadecenyl imidazolinyl alkenyl succinate, zinc naphthenate and barium dinonyl naphthalene sulfonate, wherein the weight ratio of heptadecenyl imidazolinyl alkenyl succinate to zinc naphthenate to barium dinonyl naphthalene sulfonate is 1: (2-7): (0.5-4) in weight ratio.

5. The high temperature resistant copper-based anti-seize agent according to claim 1, wherein: the weight ratio of the heptadecenyl imidazoline alkenyl succinate to the zinc naphthenate to the barium dinonyl naphthalene sulfonate is 1: (3-5): (2.5-3).

6. The high temperature resistant copper-based anti-seize agent according to claim 1, wherein: the antiwear agent is selected from one or more of tricresyl phosphate, amine thiophosphate salt and isooctyl acid phosphate ester octadecylamine salt.

7. The high temperature resistant copper-based anti-galling agent of claim 1, wherein: the antiwear agent is prepared from tricresyl phosphate, thiophosphoric acid amine salt and isooctyl acid phosphoric acid ester octadecylamine salt in a weight ratio of 10: (1-3): (6-10) mass ratio.

8. The high temperature resistant copper-based anti-galling agent of claim 1, wherein: the antifriction agent is oleic acid epoxy ester or organic molybdenum; preferably, the organic molybdenum is molybdenum dialkyl dithiophosphate or molybdenum dialkyl dithiocarbamate.

9. The high temperature resistant copper-based anti-seize agent according to claim 1, wherein: the antioxidant is selected from any one of dialkyldiphenylamine, dialkyldithiocarbamate ZDTC and zinc dialkyldithiophosphate ZDDP.

10. The high temperature resistant copper-based anti-seize agent according to claim 1, wherein: the antioxidant is prepared from dialkyl diphenylamine, dialkyl dithiocarbamate ZDCP and zinc dialkyl dithiophosphate ZDDP in a ratio of 10: (0.3-0.8): (1-2.8) in terms of mass ratio.