Antistatic corrosion-resistant powder coating as well as preparation method and application thereof

Abstract

The invention discloses an antistatic corrosion-resistant powder coating as well as a preparation method and application thereof, and belongs to the technical field of powder coatings. The antistatic corrosion-resistant powder coating is prepared from the following components: thermosetting resin, a curing agent, aniline carbon nanotube composite filler, a flatting agent, a defoaming agent and titanium dioxide. By introducing the polyaniline carbon nanotube composite material, the conductivity, chemical corrosion resistance and mechanical property of the coating are remarkably improved, and the problem that a functional material of a traditional powder coating is difficult to disperse is solved.

Description

Technical Field

[0001] The present application relates to an antistatic and corrosion-resistant powder coating and a preparation method and application thereof, belonging to the technical field of powder coatings. Background Art

[0002] In modern industry, especially in the electronics, petrochemical, coal mining and other industries, the demand for functional powder coatings is growing. Traditional powder coatings often have difficulty in taking into account both antistatic and anti-corrosion properties while providing basic anti-corrosion protection. For example, in antistatic powder coatings, in order to achieve good conductivity, a large amount of conductive fillers (such as conductive carbon black, metal powder, etc.) are usually required, however, this will significantly reduce the mechanical strength and surface finish of the coating. At the same time, these fillers have a negative impact on the dispersibility and long-term stability of the coating, limiting its scope of application. In addition, the conductivity of antistatic coatings usually decreases significantly with changes in ambient humidity, making it difficult to meet the industry's requirements for stable performance. Summary of the invention

[0003] In order to meet the demand of modern industry for high-performance coatings, the present application provides a technical solution for a multifunctional powder coating with antistatic and anti-corrosion properties. By introducing polyaniline carbon nanotube composite materials, the conductivity, chemical corrosion resistance and mechanical properties of the coating are significantly improved, and the problem of difficulty in dispersing functional materials of traditional powder coatings is overcome.

[0004] This application adopts the following technical solutions: According to one aspect of the present application, an antistatic and corrosion-resistant powder coating is provided, characterized in that the antistatic and corrosion-resistant powder coating comprises the following components: Thermosetting resin, curing agent, aniline carbon nanotube composite filler, leveling agent, defoaming agent, titanium dioxide.

[0005] Titanium dioxide plays a special role in this application, and it forms a synergistic effect with the aniline carbon nanotube composite filler. The use of titanium dioxide not only significantly enhances the chemical corrosion resistance and UV resistance of the coating, improves the weather resistance of the coating, but also improves the hiding power, glossiness and flatness of the coating through its high refractive index. At the same time, the addition of titanium dioxide helps to alleviate the agglomeration problem of the aniline carbon nanotube composite filler in the matrix, forming a stable dispersion system, thereby improving the uniformity and performance of the coating. In addition, the synergistic effect of titanium dioxide and the aniline carbon nanotube composite filler not only optimizes the mechanical properties and adhesion of the coating, but also balances the conductivity and corrosion resistance, so that the coating has achieved a comprehensive improvement in antistatic, corrosion resistance and mechanical properties, showing the innovation and uniqueness of this application.

[0006] Optionally, in the antistatic and corrosion-resistant powder coating, the content of the aniline carbon nanotube composite filler is 0.5-10wt%.

[0007] Optionally, the aniline carbon nanotube composite filler is selected from at least one of polyaniline-multi-walled carbon nanotubes (PANI-MWCNTs), polyaniline-single-walled carbon nanotubes (PANI-SWCNTs), and polyaniline-functionalized carbon nanotubes (PANI-fCNTs).

[0008] The introduction of polyaniline carbon nanotube composite materials into the components can significantly improve the conductivity, chemical corrosion resistance and mechanical properties of the coating based on its unique structure and properties, and effectively overcome the problem of difficult dispersion of functional materials of traditional powder coatings. In achieving the technical effect of improving conductivity, corrosion resistance and mechanical properties, the role of polyaniline carbon nanotube composite materials is mainly reflected in the following aspects: First, as a conductive polymer, polyaniline can provide excellent conductivity through its π-electron conjugated system, while the high aspect ratio and conductivity characteristics of carbon nanotubes further enhance the conductive network structure of the system, thereby effectively improving the antistatic properties of the coating. Secondly, the chemical stability of polyaniline combined with the inertness and oxidation resistance of carbon nanotubes make the coating show excellent chemical stability in corrosive environments. In addition, the nano-enhancement effect of carbon nanotubes can improve the rigidity and toughness of the coating, and at the same time form a complementary effect with polyaniline composites, so that the mechanical properties of the coating are fully optimized.

[0009] Optionally, the antistatic and corrosion-resistant powder coating comprises the following components in parts by weight: 50-65 parts by weight of thermosetting resin; 7-15 parts by weight of curing agent; 0.5-10 parts by weight of polyaniline carbon nanotube composite filler; Leveling agent 0.2~0.3 parts by weight; Defoaming agent 0.1~ 0.2 parts by weight; 19.2-32.5 parts by weight of titanium dioxide; The total weight of the above components is 100 parts by weight.

[0010] Optionally, the aniline carbon nanotube composite filler is obtained by the following preparation method: S1, immersing the carbon nanotubes in a mixture of concentrated nitric acid and concentrated sulfuric acid, reflux treatment, and then washing and drying to obtain pretreated carbon nanotubes; S2, dispersing the carbon nanotubes pretreated in step S1 in a mixed solution containing aniline and hydrochloric acid, dropping an oxidant into the mixed solution, reacting, and then washing and drying to obtain the aniline carbon nanotube composite filler.

[0011] Optionally, in step S1, the carbon nanotubes are selected from multi-walled carbon nanotubes, single-walled carbon nanotubes, and functionalized carbon nanotubes.

[0012] Optionally, in step S1, the volume ratio of concentrated nitric acid to concentrated sulfuric acid in the mixed solution is 1:3.

[0013] Optionally, in step S1, the reflux treatment time is 2 to 24 hours.

[0014] Optionally, in step S2, the dispersion conditions include: ultrasonic treatment at 0-5°C for 30-60 min.

[0015] Optionally, in step S2, the reaction conditions include: reaction temperature of 0-5°C, and reaction time of 4-46h.

[0016] Optionally, in step S2, the amount of the oxidant added is in a ratio of 0.05-0.3 mol:1L to the amount of the mixed solution.

[0017] Optionally, the oxidizing agent is selected from ammonium persulfate.

[0018] Optionally, in step S2, the concentration of aniline in the mixed solution is 0.1-0.5 mol / L, and the concentration of hydrochloric acid is 1-2 mol / L.

[0019] Optionally, in step S2, the amount of the carbon nanotubes used is 0.1-0.5% by weight of the mixed solution.

[0020] In overcoming the problem of the difficulty of dispersing the functional materials of traditional powder coatings, the role of the polyaniline carbon nanotube composite material is manifested in its good interface compatibility and dispersibility. On the one hand, the processing process of step S1 allows the carbon nanotubes to introduce polar groups such as carboxyl and hydroxyl groups through surface functionalization, forming a strong interface interaction with the polyaniline molecules, thereby significantly improving the dispersibility of the composite material in the coating matrix. On the other hand, the polyaniline molecular chain is coated on the surface of the carbon nanotube to form a uniform composite structure, which effectively suppresses the agglomeration problem of the carbon nanotube. In addition, the flexible molecular chain of polyaniline can provide a stable network structure during the dispersion process, making the dispersion of the composite material in the powder coating more uniform, thereby improving the functionality and stability of the coating as a whole. These characteristics make the polyaniline carbon nanotube composite material show a significant advantage in achieving a balance between functionality and stability, becoming an important innovation point of the technical solution.

[0021] Optionally, the preparation method of aniline carbon nanotube composite filler includes the following steps: first, pre-treating carbon nanotubes, reflux-treating carbon nanotubes (CNTs) in a mixed solution of concentrated nitric acid and concentrated sulfuric acid (volume ratio of 1:3) for 2 to 24 hours to remove surface impurities and introduce carboxyl groups, washing the refluxed carbon nanotubes with deionized water until neutral, and drying for use. Then, preparing aniline carbon nanotube composite materials by chemical polymerization. Add water to the reactor, dissolve appropriate amounts of aniline (0.1 to 0.5 mol / L) and hydrochloric acid (1 to 2 mol / L) to prepare a reaction solution, disperse the pre-treated carbon nanotubes in the above reaction solution at a mass ratio of 0.1 to 0.5%, and ultrasonically disperse for 30 to 60 minutes. Under stirring conditions, add ammonium persulfate solution (APS, 0.05 to 0.3 mol / L) dropwise as an oxidant, control the reaction temperature to 05°C, and continue stirring for 46 hours. After the reaction is completed, the product is repeatedly washed with deionized water until it is neutral, filtered and dried to obtain an aniline carbon nanotube composite filler. The above-mentioned aniline carbon nanotube composite filler can also be obtained by selecting different composite material preparation methods. The aniline carbon nanotube composite filler can be selected from at least one of polyaniline-multi-walled carbon nanotubes (PANI-MWCNTs), polyaniline-single-walled carbon nanotubes (PANI-SWCNTs), and polyaniline-functionalized carbon nanotubes (PANI-fCNTs). The materials are prepared by chemical oxidation polymerization, electrostatic polymerization, and graft copolymerization, respectively, which can ensure that they have good conductivity and dispersibility.

[0022] Optionally, the thermosetting resin is selected from at least one of epoxy resin, unsaturated polyester resin and polyurethane resin.

[0023] Optionally, the curing agent is selected from at least one of dicyandiamide, polyamide, and phenolic resin.

[0024] Optionally, the leveling agent is selected from at least one of a polyacrylate leveling agent, a silicone leveling agent, and a fluorocarbon surfactant.

[0025] Optionally, the defoaming agent is selected from at least one of a silicone defoaming agent, a polyether defoaming agent, and a mineral oil defoaming agent.

[0026] According to one aspect of the present application, a method for preparing the above-mentioned antistatic and corrosion-resistant powder coating is provided, comprising the following steps: The raw materials including thermosetting resin, curing agent, aniline carbon nanotube composite filler, leveling agent, defoaming agent and titanium dioxide are mixed evenly to obtain the antistatic and corrosion-resistant powder coating.

[0027] The uniform mixing process described in the above steps generally includes the following steps: first, pre-treat the raw materials to ensure that the components such as thermosetting resin, curing agent and polyaniline carbon nanotube composite filler meet the use requirements, and dry or remove impurities if necessary. Subsequently, the raw materials are fully dispersed and mixed by a high-speed mixer or twin-screw extruder to ensure that the filler is evenly distributed and avoid agglomeration. When necessary, a melt extrusion process can be used to further mix at a controlled temperature (such as 80~120℃) to form a uniform expectation. Next, the extruded material is cooled and crushed into a powder coating of the desired particle size, and finally packaged after screening to ensure that the particle size is consistent, thereby preparing an antistatic and corrosion-resistant powder coating with stable performance.

[0028] According to one aspect of the present application, there is provided an application of the above-mentioned antistatic and corrosion-resistant powder coating in the protective coating of electronic equipment housing, the corrosion-resistant coating of petrochemical equipment, and the antistatic coating of coal mining equipment.

[0029] The beneficial effects of this application include: The antistatic and corrosion-resistant powder coating provided in the present application significantly improves the conductivity, chemical corrosion resistance and mechanical properties of the coating, overcomes the problem of difficulty in dispersing functional materials of traditional powder coatings, and meets the application needs of modern industry for high-performance coatings. DETAILED DESCRIPTION

[0030] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0031] Unless otherwise specified, the raw materials in the examples of this application were purchased through commercial channels.

[0032] Sources of materials used in the examples of this application: The source of the thermosetting resin is: epoxy resin purchased from BASF, the brand is BASF EPIKOTE, and the model is 828.

[0033] The source of the curing agent is: a dicyandiamide curing agent purchased from Huntsman Corporation, the brand is Huntsman ARADUR, and the model is HY951.

[0034] The source of the leveling agent is: purchased from BYK Chemical Company, the brand is BYK-310, the model is 310 polyacrylate leveling agent.

[0035] The source of the defoaming agent is: purchased from Wacker Chemical Company, the brand is WACKER AK10, and the model is AK10 silicone defoaming agent.

[0036] The source of titanium dioxide is: purchased from Lomon Billions Group Co., Ltd., the brand is anatase titanium dioxide, model number is R-996.

[0037] The source of the conductive carbon black is: purchased from Cabot Corporation, the brand is VULCAN XC-72, and the model is XC-72 high conductive carbon black.

[0038] Preparation method of polyaniline carbon nanotube composite filler used in the examples of this application: Step 1: Pretreatment of carbon nanotubes: commercially available multi-walled carbon nanotubes (purchased from Nanocyl, model NC7000) were placed in a mixed solution of concentrated nitric acid and concentrated sulfuric acid (volume ratio 1:3) and refluxed for 2 hours, filtered, washed with deionized water until neutral, and dried for later use; Step 2: Polymerization of aniline: At 5°C, the pretreated carbon nanotubes were dispersed in a solution containing 0.1 mol / L aniline and 1 mol / L hydrochloric acid at a mass ratio of 0.5%. After ultrasonic dispersion for 30 minutes, 0.05 mol / L ammonium persulfate solution was added dropwise and stirred for reaction for 4 hours. After the reaction, the mixture was washed to neutrality and dried to obtain a polyaniline carbon nanotube composite material.

[0039] Unless otherwise specified, conventional methods were used for testing and instrument settings were those recommended by the manufacturer.

[0040] The performance test method used in the embodiments of the present application is as follows: The test method of surface resistance is as follows: Test instrument: Use KEITHLEY 6517B type high resistance meter, equipped with 8009 type test fixture. Test method: Under the conditions of temperature 25℃ and relative humidity 50%, place the test sample on an insulating base and test the surface resistance value between the two electrodes. Apply a voltage of 100 V and read the stable resistance value in Ω.

[0041] The test method of neutral salt spray test is as follows: Test equipment: Use Q-FOG CCT 600 salt spray test chamber. Test method: According to ASTM B117 standard, the coating sample is exposed to the mist environment of 5% NaCl solution, and the test chamber temperature is controlled at 35±2℃. The observation time is set to 500 hours, and the sample surface is recorded every 100 hours to see if there is blistering, cracking or corrosion.

[0042] The test method for coating adhesion is as follows: Test instrument: Elcometer 106 adhesion tester is used. Test method: According to ASTM D3359 standard, the cross-cut method is used for testing. A scratch knife is used to scratch a grid pattern (1 mm spacing) on ​​the surface of the sample coating, and transparent tape is used to stick it and then quickly torn off. The adhesion is evaluated based on the peeling of the coating, and the grade range is 5B (best) to 0B (worst).

[0043] The test method for coating hardness is as follows: Test instrument: Use BYK PENCIL HARDNESS TESTER pencil hardness tester. Test method: According to ASTM D3363 standard, select 6B to 6H pencils, apply fixed pressure (7.5 N) at a 45° angle and scratch along the coating surface. The highest hardness pencil that does not damage the coating surface is the coating hardness.

[0044] The test method for coating appearance is as follows: Test instrument: naked eye observation combined with BYK Wave Scan instrument detection. Test method: According to ISO 2813 standard, observe the gloss, flatness and uniformity of the coating surface under standard light source. Use WaveScan to measure the coating surface waviness (unit: WU), and make a comprehensive evaluation combined with visual observation results.

[0045] Example 1 (Polyaniline carbon nanotube content is 3%) The antistatic and corrosion-resistant powder coating is obtained by uniformly mixing the following components in parts by weight: Thermosetting resin: 60 parts by weight Curing agent: 10 parts by weight Polyaniline carbon nanotube composite filler: 3 parts by weight Leveling agent: 0.2 parts by weight Defoaming agent: 0.1 parts by weight Titanium dioxide: 26.7 parts by weight The performance test results are shown in Table 1. The surface resistance is 0.05×10^4Ω, there is no change in the neutral salt spray test for 500 hours, the coating is smooth and flat, the adhesion is 5B, and the hardness is 2H.

[0046] Example 2 (Polyaniline carbon nanotube content is 1%) The antistatic and corrosion-resistant powder coating is obtained by uniformly mixing the following components in parts by weight: Thermosetting resin: 62 parts by weight Curing agent: 12 parts by weight Polyaniline carbon nanotube composite filler: 1 part by weight Leveling agent: 0.2 parts by weight Defoaming agent: 0.1 parts by weight Titanium dioxide: 24.7 parts by weight The performance test results are shown in Table 1. The surface resistance is 0.2×10^4Ω, the corrosion resistance is good, the coating is smooth, the adhesion is 5B, and the hardness is 2H.

[0047] Example 3 (Polyaniline carbon nanotube content is 5%) The antistatic and corrosion-resistant powder coating is obtained by uniformly mixing the following components in parts by weight: Thermosetting resin: 58 parts by weight Curing agent: 9 parts by weight Polyaniline carbon nanotube composite filler: 5 parts by weight Leveling agent: 0.2 parts by weight Defoaming agent: 0.1 parts by weight Titanium dioxide: 27.7 parts by weight The performance test results are shown in Table 1. The surface resistance is 0.03×10^4Ω, the coating has excellent antistatic properties, adhesion 5B, and hardness 2H.

[0048] Example 4 (Polyaniline carbon nanotube content is 7%) The antistatic and corrosion-resistant powder coating is obtained by uniformly mixing the following components in parts by weight: Thermosetting resin: 55 parts by weight Curing agent: 8 parts by weight Polyaniline carbon nanotube composite filler: 7 parts by weight Leveling agent: 0.3 parts by weight Defoaming agent: 0.1 parts by weight Titanium dioxide: 29.6 parts by weight The performance test results are shown in Table 1. The surface resistance is 0.02×10^4Ω, the coating has excellent antistatic performance and good corrosion resistance.

[0049] Example 5 (Polyaniline carbon nanotube content is 10%) The antistatic and corrosion-resistant powder coating is obtained by uniformly mixing the following components in parts by weight: Thermosetting resin: 50 parts by weight Curing agent: 7 parts by weight Polyaniline carbon nanotube composite filler: 10 parts by weight Leveling agent: 0.3 parts by weight Defoamer: 0.2 parts by weight Titanium dioxide: 32.5 parts by weight The performance test results are shown in Table 1. The antistatic and anti-corrosion properties are the best, but the hardness is slightly reduced (1H).

[0050] Example 6 (Polyaniline carbon nanotube content is 0.5%) The antistatic and corrosion-resistant powder coating is obtained by uniformly mixing the following components in parts by weight: Thermosetting resin: 65 parts by weight Curing agent: 15 parts by weight Polyaniline carbon nanotube composite filler: 0.5 parts by weight Leveling agent: 0.2 parts by weight Defoaming agent: 0.1 parts by weight Titanium dioxide: 19.2 parts by weight The performance test results are shown in Table 1. The surface resistance is 0.5×10^4Ω, the antistatic performance is moderate, and the corrosion resistance is good.

[0051] Comparative Example 1 (Carbon Nanotubes without Polyaniline) The powder coating is obtained by uniformly mixing the following components in parts by weight: Thermosetting resin: 60 parts by weight Curing agent: 10 parts by weight Titanium dioxide: 30 parts by weight Leveling agent: 0.2 parts by weight Defoaming agent: 0.1 parts by weight The performance test results are shown in Table 1. There is no conductivity and the corrosion resistance is significantly reduced.

[0052] Comparative Example 2 (Traditional Conductive Filler) The powder coating is obtained by uniformly mixing the following components in parts by weight: Thermosetting resin: 60 parts by weight Curing agent: 10 parts by weight Conductive carbon black: 10 parts by weight Titanium dioxide: 20 parts by weight Leveling agent: 0.2 parts by weight Defoaming agent: 0.1 parts by weight The performance test results are shown in Table 1. The conductivity of the coating is improved, but the surface is rough and the corrosion resistance is insufficient.

[0053] Comparative Example 3 (Carbon nanotubes without pretreatment) The antistatic and corrosion-resistant powder coating is obtained by uniformly mixing the following components in parts by weight: Thermosetting resin: 60 parts by weight Curing agent: 10 parts by weight Unpretreated polyaniline carbon nanotube composite filler: 3 parts by weight Leveling agent: 0.2 parts by weight Defoaming agent: 0.1 parts by weight Titanium dioxide: 26.7 parts by weight Wherein, the preparation method of the unpretreated polyaniline carbon nanotube composite filler is: Step 1: Wash the commercially available multi-walled carbon nanotubes with deionized water until they are neutral, and dry them for later use; Step 2: Polymerization of aniline: At 0-5°C, the carbon nanotubes prepared in step S1 were dispersed at a mass ratio of 0.5% in a solution containing 0.1 mol / L aniline and 1 mol / L hydrochloric acid. After ultrasonic dispersion for 30 minutes, 0.05 mol / L ammonium persulfate solution was added dropwise. The mixture was stirred for reaction for 4 hours. After the reaction, the mixture was washed to neutrality and dried to obtain a polyaniline carbon nanotube composite material.

[0054] The performance test results are shown in Table 1. Surface resistance: 0.8×10 4 Ω; Neutral salt spray test: slight corrosion spots appeared after 300 hours; The gloss and flatness of the coating are significantly reduced, the adhesion is 3B, and the hardness is 2H; Analysis: Due to the lack of pretreatment, impurities and agglomeration on the surface of carbon nanotubes are significant, resulting in poor dispersion and incomplete conductive network, which seriously affects the conductivity and corrosion resistance of the coating.

[0055] Comparative Example 4 (Using components other than titanium dioxide) The antistatic and corrosion-resistant powder coating is obtained by uniformly mixing the following components in parts by weight: Thermosetting resin: 60 parts by weight Curing agent: 10 parts by weight Polyaniline carbon nanotube composite filler: 3 parts by weight Leveling agent: 0.2 parts by weight Defoaming agent: 0.1 parts by weight Kaolin: 26.7 parts by weight The preparation method of the polyaniline carbon nanotube composite filler is the same as that in Example 1.

[0056] The performance test results are shown in Table 1. Surface resistance: 0.1×10 4 Ω; Neutral salt spray test: After 200 hours, the coating cracked and obvious corrosion occurred The gloss and flatness of the coating decreased, the adhesion was 4B, and the hardness was 1H; Analysis: Kaolin is a common filler to replace titanium dioxide. Since kaolin cannot form a synergistic effect with polyaniline carbon nanotubes, the corrosion resistance, hiding power and glossiness of the coating are greatly reduced, and the hardness and adhesion are insufficient.

[0057] Table 1 Performance test summary

[0058] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. An antistatic and corrosion-resistant powder coating, characterized in that: The antistatic and corrosion-resistant powder coating comprises the following components: Thermosetting resin, curing agent, aniline carbon nanotube composite filler, leveling agent, defoaming agent, titanium dioxide.

2. The antistatic and corrosion-resistant powder coating according to claim 1, characterized in that: In the antistatic and corrosion-resistant powder coating, the content of the aniline carbon nanotube composite filler is 0.5-10wt%.

3. The antistatic and corrosion-resistant powder coating according to claim 1, characterized in that: The antistatic and corrosion-resistant powder coating comprises the following components in parts by weight: 50-65 parts by weight of thermosetting resin; 7-15 parts by weight of curing agent; 0.5-10 parts by weight of polyaniline carbon nanotube composite filler; 0.2~0.3 parts by weight of leveling agent; Defoaming agent 0.1~ 0.2 parts by weight; 19.2-32.5 parts by weight of titanium dioxide; The total weight of the above components is 100 parts by weight.

4. The antistatic and corrosion-resistant powder coating according to claim 1, characterized in that: The aniline carbon nanotube composite filler is obtained by the following preparation method: S1, immersing the carbon nanotubes in a mixture of concentrated nitric acid and concentrated sulfuric acid, reflux treatment, and then washing and drying to obtain pretreated carbon nanotubes; S2, dispersing the carbon nanotubes pretreated in step S1 in a mixed solution containing aniline and hydrochloric acid, dropping an oxidant into the mixed solution, reacting, and then washing and drying to obtain the aniline carbon nanotube composite filler.

5. The antistatic and corrosion-resistant powder coating according to claim 1, characterized in that: The thermosetting resin is selected from at least one of epoxy resin, unsaturated polyester resin and polyurethane resin.

6. The antistatic and corrosion-resistant powder coating according to claim 1, characterized in that: The curing agent is selected from at least one of dicyandiamide, polyamide and phenolic resin.

7. The antistatic and corrosion-resistant powder coating according to claim 1, characterized in that: The leveling agent is selected from at least one of polyacrylate leveling agents, silicone leveling agents, and fluorocarbon surfactants.

8. The antistatic and corrosion-resistant powder coating according to claim 1, characterized in that: The defoamer is selected from at least one of an organosilicon defoamer, a polyether defoamer and a mineral oil defoamer.

9. The method for preparing the antistatic and corrosion-resistant powder coating according to any one of claims 1 to 8, characterized in that: The steps include: The raw materials including thermosetting resin, curing agent, aniline carbon nanotube composite filler, leveling agent, defoaming agent and titanium dioxide are mixed evenly to obtain the antistatic and corrosion-resistant powder coating.

10. Use of the antistatic and corrosion-resistant powder coating according to any one of claims 1 to 8 in protective coatings for electronic equipment housings, corrosion-resistant coatings for petrochemical equipment, and antistatic coatings for coal mining equipment.

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