Epoxy anticorrosive paint for aluminum parts and preparation method of epoxy anticorrosive paint

Abstract

The invention discloses an epoxy anticorrosive paint for aluminum parts and a preparation method thereof, and belongs to the technical field of anticorrosive paints.The epoxy anticorrosive paint is composed of a paint main agent component A and a curing agent component B. The paint main agent component A is composed of epoxy resin, anti-rust pigment, anti-rust filler, a solvent A, a dispersing agent, an anti-settling agent, a flatting agent and a defoaming agent; the curing agent component B is prepared from polyamide resin, a solvent B, meso-tetramethyl-meso-tetra (p-aminophenyl) calix [4] pyrrole and an auxiliary agent; the mass ratio of the coating main agent component A to the curing agent component B is (5-8): 1. The epoxy anticorrosive paint for the aluminum piece has excellent adhesive force to the aluminum piece and is excellent in corrosion resistance.

Description

Technical Field

[0001] The invention relates to the technical field of anti-corrosion coatings, and in particular to an epoxy anti-corrosion coating for aluminum parts and a preparation method thereof. Background Art

[0002] Aluminum alloys are widely used due to their high strength, easy processing and light weight, and the amount of aluminum alloys has continued to grow in recent years. In daily environments, aluminum alloys themselves can form a dense oxide film on the surface, which has good corrosion resistance. However, in some relatively harsh environments, such as acidic environments, high-salt environments, high-temperature and high-humidity environments, and corrosive media environments, the oxide film on the surface of aluminum alloys is easily damaged, which in turn causes serious damage to the internal structure of the aluminum alloy. Therefore, it is of great significance to study and develop a coating that can effectively and permanently inhibit the corrosion of aluminum parts made of aluminum alloys.

[0003] At present, there are a wide variety of anti-corrosion coatings on the market, including polymer coatings, metal coatings, and inorganic compound coatings, but it is still difficult to balance the density, adhesion, durability, and corrosion resistance of the coatings. Epoxy-polyamide anti-corrosion coatings are the most productive and widely sold varieties of all anti-corrosion coating systems, and are widely used throughout the world. Due to its excellent adhesion, oxidation resistance, and corrosion resistance, coating it on the surface of steel can delay the oxidation of steel to the greatest extent, protect the steel substrate, and greatly increase the service life of the coated workpiece. However, it has no adhesion to aluminum parts, so there is no anti-oxidation and anti-corrosion function. Therefore, how to solve the adhesion problem of epoxy-polyamide anti-corrosion coatings on aluminum parts has become a difficult problem that coating technology workers need to solve urgently.

[0004] In recent years, coating technology workers have conducted various tests to solve the adhesion problem by adding a certain amount of adhesion promoter to component A (epoxy component). Specific types of adhesion promoters include epoxy phosphate, polyester phosphate, titanate coupling agent and epoxy silane coupling agent. However, the final test results show that although the above four types of adhesion promoters contain a large number of chelating groups, the activity of the chelating groups is not stimulated at room temperature, so they cannot play their due role and the adhesion problem is not solved. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an epoxy anti-corrosion coating for aluminum parts and a preparation method thereof; the anti-corrosion coating not only has excellent antioxidant and corrosion resistance, can be completely naturally dried, but also has excellent adhesion to aluminum parts. For steel metals, its adhesion is stronger than that of conventional epoxy-polyamide anti-corrosion coatings.

[0006] To achieve the above object, the technical solution adopted by the present invention is: an epoxy anti-corrosion coating for aluminum parts, comprising a coating main agent A component and a curing agent B component, wherein the coating main agent A component comprises epoxy resin, anti-rust pigment, anti-rust filler, solvent A, dispersant, anti-settling agent, leveling agent and defoaming agent; the curing agent B component comprises polyamide resin, solvent B, meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole and auxiliary agent; the mass ratio of the coating main agent A component to the curing agent B component is (5-8):1.

[0007] Preferably, the material proportions of the coating main agent component A are as follows: 25-35 parts of epoxy resin, 15-25 parts of anti-rust pigment, 25-35 parts of anti-rust filler, 5-10 parts of solvent A, 1-2 parts of dispersant, 0.5-2 parts of anti-settling agent, 0.3-1 parts of leveling agent, and 0.1-0.5 parts of defoaming agent.

[0008] Preferably, the material proportions of the curing agent component B are as follows: 50 parts of polyamide resin, 42-47 parts of solvent B, 5-10 parts of meso-tetramethyl-meso-tetra-p-aminophenylcalix[4]pyrrole, and 3-10 parts of auxiliary agent.

[0009] Preferably, the epoxy resin is epoxy resin with a grade of 601-75 provided by Sanmu Company.

[0010] Preferably, the anti-rust pigment is one or a combination of two of iron ore red powder, zinc phosphate, zinc chrome yellow, zinc powder, and strontium chrome yellow.

[0011] Preferably, the anti-rust filler is one or a combination of two of iron titanium powder, ferrophosphorus powder, mica iron oxide powder, barium sulfate, and mica powder; and the particle size of the anti-rust filler is 1000-1500 mesh.

[0012] Preferably, the solvent A is one or a combination of two of butyl acetate, xylene, toluene, n-butanol, isobutanol, benzyl alcohol, and cyclohexanone.

[0013] Preferably, the dispersant is sodium hexametaphosphate and / or Japan Nopco dispersant SN-5040.

[0014] Preferably, the anti-settling agent is one or a combination of two of organic bentonite, white carbon black, polyamide wax, and hydrogenated castor oil.

[0015] Preferably, the leveling agent is at least one of German BYK leveling agent BYK-333 and silicone leveling agent HY-5030.

[0016] Preferably, the defoaming agent is at least one of tributyl phosphate, defoaming agent Deqian 3100, and defoaming agent BYK088.

[0017] Preferably, the polyamide resin is a commercially available polyamide curing agent with a grade of 650 for epoxy resin curing agent, and its amine value is 200.

[0018] Preferably, the solvent B is one or a combination of two of toluene, xylene, trimethylbenzene, n-butanol and isobutanol.

[0019] Preferably, there is no special requirement for the source of the Meso-tetramethyl-meso-tetraaminophenyl-calix [4] pyrrole. In one embodiment of the present invention, the preparation method of the Meso-tetramethyl-meso-tetraaminophenyl-calix [4] pyrrole is described in: Guo Yong, Shao Shijun, He Lijun, et al. Synthesis and Characterization of Meso-tetramethyl-meso-tetraaminophenyl-calix [4] pyrrole [J]. Chemical Reagents, 2002 (6): 344-345.

[0020] Preferably, the auxiliary agent is a silane coupling agent.

[0021] Preferably, the silane coupling agent is 3-(2-aminoethylamino)propyltrimethoxysilane.

[0022] Another object of the present invention is to provide a method for preparing the epoxy anti-corrosion coating for aluminum parts, comprising the following steps: mixing the various materials of the coating main agent component A in a uniform ratio to obtain the coating main agent component A; mixing the various materials of the curing agent component B in a uniform ratio to obtain the curing agent component B; and then mixing the coating main agent component A and the curing agent component B in a uniform ratio to obtain the epoxy anti-corrosion coating for aluminum parts.

[0023] Due to the application of the above technical solution, the present invention has the following beneficial effects: the present invention reasonably designs the coating component formula so that the raw materials of each component can cooperate with each other to give the coating product excellent corrosion resistance and adhesion; abandons the commonly used high-temperature baking process and also abandons the commonly used adhesion promoters such as epoxy phosphate, polyester phosphate, phthalate coupling agent, epoxy silane coupling agent, etc., and chooses to directly add 3-(2-aminoethylamino)propyltrimethoxysilane and Meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole to the polyamide component, which completely solves the epoxy-polyamide coating problem. The adhesion problem of polyamide anti-corrosion coating on aluminum metal workpieces is solved. On the one hand, the process of natural drying at room temperature is maintained, saving electricity; large aluminum metal workpieces or pipelines that cannot enter the oven can be normally applied with epoxy-polyamide anti-corrosion coatings and obtain a coating with strong adhesion; 3-(2-aminoethylamino)propyltrimethoxysilane and Meso-tetramethyl-meso-tetra-aminophenyl cup [4] pyrrole not only act as adhesion promoters, but also act as epoxy curing agents. It reacts with the epoxy group of the polyamide resin at the same time to form a denser three-dimensional network coating, thereby obtaining better adhesion and anti-corrosion performance. DETAILED DESCRIPTION

[0024] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0025] Embodiment 1

[0026] An epoxy anticorrosive coating for aluminum parts, comprising a coating main agent component A and a curing agent component B, wherein the coating main agent component A comprises epoxy resin, antirust pigment, antirust filler, solvent A, dispersant, anti-settling agent, leveling agent and defoaming agent; the curing agent component B comprises polyamide resin, solvent B, meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole and an auxiliary agent; and the mass ratio of the coating main agent component A to the curing agent component B is 5:1.

[0027] The material proportions of the coating main agent component A are as follows: 25 parts of epoxy resin, 15 parts of anti-rust pigment, 25 parts of anti-rust filler, 5 parts of solvent A, 1 part of dispersant, 0.5 parts of anti-settling agent, 0.3 parts of leveling agent, and 0.1 parts of defoaming agent.

[0028] The material proportions of the curing agent B component are as follows: 50 parts of polyamide resin, 42 parts of solvent B, 5 parts of meso-tetramethyl-meso-tetra-p-aminophenylcalix[4]pyrrole, and 3 parts of auxiliary agent.

[0029] The epoxy resin is epoxy resin with a brand number of 601-75 provided by Sanmu Company; the anti-rust pigment is iron red powder; the anti-rust filler is iron titanium powder; the particle size of the anti-rust filler is 1000 mesh; the solvent A is butyl acetate; the dispersant is sodium hexametaphosphate; the anti-settling agent is organic bentonite; the leveling agent is German BYK leveling agent BYK-333; the defoaming agent is tributyl phosphate; the polyamide resin is a commercially available polyamide with a brand number of 650 used for epoxy resin curing agent The curing agent has an amine value of 200; the solvent B is toluene; the preparation method of the meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole, see: Guo Yong, Shao Shijun, He Lijun, et al. Synthesis and Characterization of Meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole [J]. Chemical Reagents, 2002 (6): 344-345; the auxiliary agent is a silane coupling agent; the silane coupling agent is 3-(2-aminoethylamino)propyltrimethoxysilane.

[0030] A preparation method of the epoxy anti-corrosion coating for aluminum parts comprises the following steps: mixing the materials of the coating main agent A component evenly according to a ratio to obtain the coating main agent A component; mixing the materials of the curing agent B component evenly according to a ratio to obtain the curing agent B component; and then mixing the coating main agent A component and the curing agent B component evenly to obtain the epoxy anti-corrosion coating for aluminum parts.

[0031] Embodiment 2

[0032] An epoxy anti-corrosion coating for aluminum parts, comprising a coating main agent component A and a curing agent component B, wherein the coating main agent component A comprises epoxy resin, anti-rust pigment, anti-rust filler, solvent A, dispersant, anti-settling agent, leveling agent and defoaming agent; the curing agent component B comprises polyamide resin, solvent B, meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole and an auxiliary agent; and the mass ratio of the coating main agent component A to the curing agent component B is 6:1.

[0033] The material proportions of the coating main agent component A are as follows: 27 parts of epoxy resin, 17 parts of anti-rust pigment, 27 parts of anti-rust filler, 6 parts of solvent A, 1.2 parts of dispersant, 0.8 parts of anti-settling agent, 0.4 parts of leveling agent, and 0.2 parts of defoaming agent.

[0034] The material proportions of the curing agent B component are as follows: 50 parts of polyamide resin, 43 parts of solvent B, 6 parts of meso-tetramethyl-meso-tetra-p-aminophenylcalix[4]pyrrole, and 4 parts of auxiliary agent.

[0035] The epoxy resin is an epoxy resin with a brand number of 601-75 provided by Sanmu Company; the anti-rust pigment is zinc phosphate; the anti-rust filler is ferrophosphorus powder; the particle size of the anti-rust filler is 1100 mesh; the solvent A is xylene; the dispersant is the Japanese Nopco dispersant SN-5040; the anti-settling agent is white carbon black; the leveling agent is the silicone leveling agent HY-5030; the defoamer is the defoamer Deqian 3100; the polyamide resin is a commercially available brand number 650 for epoxy resin curing agent A polyamide curing agent having an amine value of 200; the solvent B is xylene; the preparation method of the meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole, see: Guo Yong, Shao Shijun, He Lijun, et al. Synthesis and Characterization of Meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole [J]. Chemical Reagents, 2002 (6): 344-345; the auxiliary agent is a silane coupling agent; the silane coupling agent is 3-(2-aminoethylamino)propyltrimethoxysilane.

[0036] A preparation method of the epoxy anti-corrosion coating for aluminum parts comprises the following steps: mixing the materials of the coating main agent A component evenly according to a ratio to obtain the coating main agent A component; mixing the materials of the curing agent B component evenly according to a ratio to obtain the curing agent B component; and then mixing the coating main agent A component and the curing agent B component evenly to obtain the epoxy anti-corrosion coating for aluminum parts.

[0037] Embodiment 3

[0038] An epoxy anti-corrosion coating for aluminum parts, comprising a coating main agent component A and a curing agent component B, wherein the coating main agent component A comprises epoxy resin, anti-rust pigment, anti-rust filler, solvent A, dispersant, anti-settling agent, leveling agent and defoaming agent; the curing agent component B comprises polyamide resin, solvent B, meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole and an auxiliary agent; and the mass ratio of the coating main agent component A to the curing agent component B is 6.5:1.

[0039] The material proportions of the coating main agent component A are as follows: 30 parts of epoxy resin, 20 parts of anti-rust pigment, 30 parts of anti-rust filler, 8 parts of solvent A, 1.5 parts of dispersant, 1.3 parts of anti-settling agent, 0.7 parts of leveling agent, and 0.35 parts of defoaming agent.

[0040] The material proportions of the curing agent B component are as follows: 50 parts of polyamide resin, 45 parts of solvent B, 7 parts of meso-tetramethyl-meso-tetra-p-aminophenylcalix[4]pyrrole, and 6 parts of auxiliary agent.

[0041] The epoxy resin is an epoxy resin with a brand number of 601-75 provided by Sanmu Company; the anti-rust pigment is zinc chrome yellow; the anti-rust filler is mica iron oxide powder; the particle size of the anti-rust filler is 1300 mesh; the solvent A is toluene; the dispersant is sodium hexametaphosphate; the anti-settling agent is polyamide wax; the leveling agent is German BYK leveling agent BYK-333; the defoamer is defoamer BYK088; the polyamide resin is a commercially available polyamide resin with a brand number of 650 for epoxy resin curing agent. Amine curing agent, whose amine value is 200; the solvent B is n-butanol; the preparation method of Meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole, see: Guo Yong, Shao Shijun, He Lijun, et al. Synthesis and Characterization of Meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole [J]. Chemical Reagents, 2002 (6): 344-345; the auxiliary agent is a silane coupling agent; the silane coupling agent is 3-(2-aminoethylamino)propyltrimethoxysilane.

[0042] A preparation method of the epoxy anti-corrosion coating for aluminum parts comprises the following steps: mixing the materials of the coating main agent A component evenly according to a ratio to obtain the coating main agent A component; mixing the materials of the curing agent B component evenly according to a ratio to obtain the curing agent B component; and then mixing the coating main agent A component and the curing agent B component evenly to obtain the epoxy anti-corrosion coating for aluminum parts.

[0043] Embodiment 4

[0044] An epoxy anti-corrosion coating for aluminum parts, comprising a coating main agent component A and a curing agent component B, wherein the coating main agent component A comprises epoxy resin, anti-rust pigment, anti-rust filler, solvent A, dispersant, anti-settling agent, leveling agent and defoaming agent; the curing agent component B comprises polyamide resin, solvent B, meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole and an auxiliary agent; and the mass ratio of the coating main agent component A to the curing agent component B is 7.5:1.

[0045] The material proportions of the coating main agent component A are as follows: 33 parts of epoxy resin, 23 parts of anti-rust pigment, 33 parts of anti-rust filler, 9 parts of solvent A, 1.8 parts of dispersant, 1.8 parts of anti-settling agent, 0.9 parts of leveling agent, and 0.4 parts of defoaming agent.

[0046] The material proportions of the curing agent B component are as follows: 50 parts of polyamide resin, 46 parts of solvent B, 9 parts of meso-tetramethyl-meso-tetra-p-aminophenylcalix[4]pyrrole, and 9 parts of auxiliary agent.

[0047] The epoxy resin is an epoxy resin with a grade of 601-75 provided by Sanmu Company; the anti-rust pigment is zinc powder; the anti-rust filler is barium sulfate; the particle size of the anti-rust filler is 1400 mesh; the solvent A is isobutyl alcohol; the dispersant is a mixture of sodium hexametaphosphate and Japanese Nopco dispersant SN-5040 in a mass ratio of 1:3; the anti-settling agent is a mixture of organic bentonite, white carbon black, polyamide wax, and hydrogenated castor oil in a mass ratio of 1:1:2:3; the leveling agent is a mixture of German BYK leveling agent BYK-333 and silicone leveling agent HY-5030 in a mass ratio of 3:5; the defoaming agent is tributyl phosphate, defoaming agent Deqian 31 00, defoaming agent BYK088 are mixed in a mass ratio of 1:2:3; the polyamide resin is a commercially available polyamide curing agent with a grade of 650 for epoxy resin curing agent, and its amine value is 200; the solvent B is toluene; the preparation method of Meso-tetramethyl-meso-tetraaminophenyl cup [4] pyrrole, see: Guo Yong, Shao Shijun, He Lijun, et al. Synthesis and Characterization of Meso-tetramethyl-meso-tetraaminophenyl cup [4] pyrrole [J]. Chemical Reagents, 2002 (6): 344-345; the auxiliary agent is a silane coupling agent; the silane coupling agent is 3-(2-aminoethylamino)propyltrimethoxysilane.

[0048] A preparation method of the epoxy anti-corrosion coating for aluminum parts comprises the following steps: mixing the materials of the coating main agent A component evenly according to a ratio to obtain the coating main agent A component; mixing the materials of the curing agent B component evenly according to a ratio to obtain the curing agent B component; and then mixing the coating main agent A component and the curing agent B component evenly to obtain the epoxy anti-corrosion coating for aluminum parts.

[0049] Embodiment 5

[0050] An epoxy anti-corrosion coating for aluminum parts, comprising a coating main agent component A and a curing agent component B, wherein the coating main agent component A comprises epoxy resin, anti-rust pigment, anti-rust filler, solvent A, dispersant, anti-settling agent, leveling agent and defoaming agent; the curing agent component B comprises polyamide resin, solvent B, meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole and an auxiliary agent; and the mass ratio of the coating main agent component A to the curing agent component B is 8:1.

[0051] The material proportions of the coating main agent component A are as follows: 35 parts of epoxy resin, 25 parts of anti-rust pigment, 35 parts of anti-rust filler, 10 parts of solvent A, 2 parts of dispersant, 2 parts of anti-settling agent, 1 part of leveling agent, and 0.5 parts of defoaming agent.

[0052] The material proportions of the curing agent B component are as follows: 50 parts of polyamide resin, 47 parts of solvent B, 10 parts of meso-tetramethyl-meso-tetra-p-aminophenylcalix[4]pyrrole, and 10 parts of an auxiliary agent.

[0053] The epoxy resin is epoxy resin with a brand number of 601-75 provided by Sanmu Company; the anti-rust pigment is strontium chrome yellow; the anti-rust filler is mica powder; the particle size of the anti-rust filler is 1500 mesh; the solvent A is cyclohexanone; the dispersant is Japanese Nopco dispersant SN-5040; the anti-settling agent is hydrogenated castor oil; the leveling agent is German BYK leveling agent BYK-333; the defoaming agent is tributyl phosphate; the polyamide resin is a commercially available brand number 650 for epoxy resin curing agent The polyamide curing agent has an amine value of 200; the solvent B is toluene; the preparation method of the Meso-tetramethyl-meso-tetraaminophenyl cup [4] pyrrole, see: Guo Yong, Shao Shijun, He Lijun, et al. Synthesis and Characterization of Meso-tetramethyl-meso-tetraaminophenyl cup [4] pyrrole [J]. Chemical Reagents, 2002 (6): 344-345; the auxiliary agent is a silane coupling agent; the silane coupling agent is 3-(2-aminoethylamino)propyltrimethoxysilane.

[0054] A preparation method of the epoxy anti-corrosion coating for aluminum parts comprises the following steps: mixing the materials of the coating main agent A component evenly according to a ratio to obtain the coating main agent A component; mixing the materials of the curing agent B component evenly according to a ratio to obtain the curing agent B component; and then mixing the coating main agent A component and the curing agent B component evenly to obtain the epoxy anti-corrosion coating for aluminum parts.

[0055] Comparative Example 1

[0056] An epoxy anticorrosive coating for aluminum parts and a preparation method thereof are basically the same as those in Example 1, except that meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole is not added.

[0057] Comparative Example 2

[0058] An epoxy anticorrosive coating for aluminum parts and a preparation method thereof are basically the same as those of Example 1, except that 3-(2-aminoethylamino)propyltrimethoxysilane is not added.

[0059] In order to further illustrate the beneficial technical effects of each product, each product was coated on an aluminum plate after configuration. After 48 hours of natural drying, its adhesion was tested according to the grating knife-adhesive tape method, and the adhesion grade was evaluated according to the evaluation standard of GB / T9286-1998. The salt spray resistance test was carried out for 1000 hours with reference to GB / T1771-2007, and the protection rating was evaluated according to GB / T6461-2002. During the test, the coating thickness of each example was controlled to be 80 microns.

[0060] Table 1

[0061] Test items Adhesion grade Protection Rating Rp unit class class Example 1 0 10 Example 2 0 10 Example 3 0 10 Example 4 0 10 Example 5 0 10 Comparative Example 1 1 6 Comparative Example 2 2 7

[0062] As can be seen from Table 1, the epoxy anticorrosive coatings for aluminum parts prepared in various embodiments of the present invention have better adhesion and anticorrosion properties. The combined use of meso-tetramethyl-meso-tetra-p-aminophenylcalix[4]pyrrole and 3-(2-aminoethylamino)propyltrimethoxysilane is beneficial to improving the above properties.

[0063] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An epoxy anticorrosion coating for aluminum parts, characterized in that: The invention is composed of a coating main agent component A and a curing agent component B, wherein the coating main agent component A is composed of epoxy resin, anti-rust pigment, anti-rust filler, solvent A, dispersant, anti-settling agent, leveling agent and defoaming agent; the curing agent component B is composed of polyamide resin, solvent B, meso-tetramethyl-meso-tetra-p-aminophenyl cup [4] pyrrole and auxiliary agent; the mass ratio of the coating main agent component A to the curing agent component B is (5-8):

1.

2. The epoxy anticorrosion coating for aluminum parts according to claim 1, characterized in that: The material proportions of the coating main agent component A are as follows: 25-35 parts of epoxy resin, 15-25 parts of anti-rust pigment, 25-35 parts of anti-rust filler, 5-10 parts of solvent A, 1-2 parts of dispersant, 0.5-2 parts of anti-settling agent, 0.3-1 parts of leveling agent, and 0.1-0.5 parts of defoaming agent.

3. The epoxy anti-corrosion coating for aluminum parts according to claim 1, characterized in that: The material proportions of the curing agent B component are as follows: 50 parts of polyamide resin, 42-47 parts of solvent B, 5-10 parts of meso-tetramethyl-meso-tetra-p-aminophenylcalix[4]pyrrole, and 3-10 parts of auxiliary agent.

4. The epoxy anticorrosion coating for aluminum parts according to claim 1, characterized in that: The epoxy resin is an epoxy resin with a grade of 601-75; the anti-rust pigment is one or a combination of two of iron ore red powder, zinc phosphate, zinc chrome yellow, zinc powder, and strontium chrome yellow.

5. The epoxy anticorrosion coating for aluminum parts according to claim 1, characterized in that: The anti-rust filler is one or a combination of two of iron titanium powder, ferrophosphorus powder, mica iron oxide powder, barium sulfate, and mica powder; the particle size of the anti-rust filler is 1000-1500 meshes.

6. The epoxy anticorrosion coating for aluminum parts according to claim 1, characterized in that: The solvent A is one or a combination of two of butyl acetate, xylene, toluene, n-butanol, isobutanol, benzyl alcohol, and cyclohexanone; the dispersant is sodium hexametaphosphate and / or Japan Nopco dispersant SN-5040.

7. The epoxy anticorrosion coating for aluminum parts according to claim 1, characterized in that: The anti-settling agent is one or a combination of two of organic bentonite, white carbon black, polyamide wax, and hydrogenated castor oil; the leveling agent is at least one of German BYK leveling agent BYK-333 and silicone leveling agent HY-5030.

8. The epoxy anticorrosion coating for aluminum parts according to claim 1, characterized in that: The defoamer is at least one of tributyl phosphate, defoamer Deqian 3100, and defoamer BYK088; the polyamide resin is a polyamide curing agent with a brand number of 650 used for epoxy resin curing agent, and its amine value is 200.

9. The epoxy anticorrosion coating for aluminum parts according to claim 1, characterized in that: The solvent B is one or a combination of two of toluene, xylene, trimethylbenzene, n-butanol and isobutanol; the auxiliary agent is a silane coupling agent; and the silane coupling agent is 3-(2-aminoethylamino)propyltrimethoxysilane.

10. A method for preparing the epoxy anticorrosive coating for aluminum parts according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: mixing the materials of the coating main agent component A evenly according to a proportion to obtain the coating main agent component A; mixing the materials of the curing agent component B evenly according to a proportion to obtain the curing agent component B; and then mixing the coating main agent component A and the curing agent component B evenly to obtain the epoxy anti-corrosion coating for aluminum parts.