Anti-corrosion graphene coating and preparation method thereof
By using graphene oxide graphene loaded with phytic acid metal complex and pretreated organomontmorillonite in graphene epoxy coatings, a multiple anti-corrosion mechanism is formed, which solves the problem of the single anti-corrosion capability of existing coatings in salt spray environment and achieves high-efficiency anti-corrosion and impact resistance performance of the coating.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-12
- Publication Date
- 2026-04-07
AI Technical Summary
Existing graphene epoxy coatings have limited corrosion resistance in salt spray environments. Once the coating cracks, it needs to be recoated or the metal components replaced, resulting in a shortened service life.
Graphene oxide loaded with phytic acid metal complex and pretreated organomontmorillonite is used as an anti-corrosion filler. Through multiple anti-corrosion mechanisms, including electrochemical and physical barrier effects, the anti-corrosion performance of the coating is enhanced.
It significantly improves the coating's impact resistance and corrosion resistance, extends the coating's service life, and enhances the coating's overall corrosion resistance.
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Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of coating preparation, and particularly relates to a corrosion-resistant graphene coating and a preparation method thereof. BACKGROUND
[0002] The graphene epoxy coating is a high-performance coating prepared by adding graphene powder based on a water-based epoxy resin, and is a coating with excellent corrosion resistance. Graphene mainly plays a corrosion-resistant effect in the graphene epoxy coating.
[0003] The graphene epoxy coating is suitable for many scenes, such as corrosion protection of pipes and steel equipment in a humid environment.
[0004] Under a salt spray environment, the prior art usually directly adds graphene oxide or reduced graphene as a filler into a base such as a water-based epoxy resin, uses the physical barrier effect to block the penetration of corrosive media, and the corrosion protection mode is single. After the first layer of corrosion protection coating is broken, the coating needs to be supplemented or the metal component needs to be replaced, thereby causing the service life of the metal component to be shortened.
[0005] To solve the above technical problems, the application provides a corrosion-resistant graphene coating with multiple corrosion resistance and a preparation method thereof. SUMMARY
[0006] (I) Technical problems solved In view of the deficiencies of the prior art, the application provides a corrosion-resistant graphene coating and a preparation method thereof.
[0007] (II) Technical solutions To achieve the above purposes, the application is implemented by the following technical solutions: A corrosion-resistant graphene coating, according to parts by weight, comprises the following components: 80-95 parts of water-based epoxy resin, 8.5-9.5 parts of graphene corrosion-resistant filler, 0.5-1 part of leveling agent, 0.5-1 part of defoaming agent, 7-9 parts of curing agent and 0.2-0.3 parts of dispersing agent. The graphene corrosion-resistant filler is graphene oxide loaded with phytic acid metal complex and pretreated organic montmorillonite, and the pretreated organic montmorillonite is obtained by pretreating sodium-based montmorillonite with toluene diisocyanate and polyethylene glycol monomethyl ether.
[0008] Further, the preparation method of the graphene corrosion-resistant filler is as follows: S1: 10-15 parts of three-dimensional porous graphene gel by weight is immersed in 10-75 parts of phytic acid solution, vacuum impregnation at 30-40℃ for 30-40 min, adjust pH to 5-6, add 2-4 parts of cerium nitrate and stir evenly, react for 50-60 min, add 1.5-3 parts of ammonium molybdate and mix evenly, heat to 60-65℃ and react for 1-2 h, dry to obtain graphene aerogel; S2: 2-3 parts of sodium-based montmorillonite by weight is dispersed in 15 parts of N,N-dimethylformamide, after ultrasonic treatment for 1 h, 0.8-1.2 parts of toluene diisocyanate and 0.2-0.3 parts of triethylamine are added, heat to 75-80℃ under nitrogen protection, and stir to react for 3 h; then 0.5-0.8 parts of polyethylene glycol monomethyl ether is added dropwise, continue to react for 2 h, centrifugal washing and drying to obtain pretreated organic montmorillonite; S3: the graphene aerogel is immersed in an ethanol solution containing 1 wt% of n-octyl triethoxysilane, and reacts at room temperature for 4 h, then the pretreated organic montmorillonite is added and stirred evenly, vacuum impregnation treatment is performed for three times, and freeze-drying is performed to obtain the graphene anticorrosive filler.
[0009] Further, the preparation method of the three-dimensional porous graphene gel is as follows: 10-15 parts of graphene oxide by weight is dispersed in deionized water, ultrasonic treatment for 1-1.5 h, 3-5 parts of sodium perborate and 1.5-2.5 parts of sodium bicarbonate are added, 60℃, 3 h, then 10-15 parts of ethylenediamine is added, heat to 90℃ and react for 6-7 h, and dry for 7-9 h to obtain the three-dimensional porous graphene gel.
[0010] Further, the mass ratio of the graphene aerogel to the pretreated organic montmorillonite is 1: (0.1-0.3).
[0011] Further, the mass fraction of the phytic acid solution is 60-65%.
[0012] Further, the curing agent is any one of phthalic anhydride, isophorone diamine, and m-xylene diamine.
[0013] Further, the defoaming agent is silicone-based defoaming agent BYK-065.
[0014] Further, the dispersing agent is BYK161 and / or BYK180.
[0015] Further, the leveling agent is an acrylate leveling agent.
[0016] A preparation method of the anticorrosive graphene paint as described above is as follows: After the water-based epoxy resin, the graphene anticorrosive filler, the leveling agent, the defoaming agent, and the dispersing agent are mixed evenly, the curing agent is added and mixed thoroughly to obtain the anticorrosive graphene paint.
[0017] Compared with the prior art, the present application has the following beneficial effects: 1、In the subsequent reaction of the graphene gel, the phosphonic acid groups in the phytic acid solution are adsorbed into the voids of the three-dimensional graphene, and the subsequently added Ce³⁺ is coordinated with the phosphonic acid groups to form a complex, thereby avoiding the agglomeration of Ce³⁺ and ensuring the uniform dispersion of rare earth ions in the gel. The ammonium molybdate cooperates with the phytic acid solution and Ce³⁺ to form a stable composite nano-particle film in the anode region under the coordination of the three-dimensional conductive network of graphene, thereby inhibiting the anodic decomposition of the metal and increasing the impact resistance of the coating.
[0018] 2、In the present application, the rigid benzene ring and flexible polyether chain are introduced into the interlayer by the reaction of toluene diisocyanate and polyethylene glycol monomethyl ether, thereby expanding the interlayer spacing of the montmorillonite, facilitating the network crossing of the voids of the graphene aerogel, forming a crosslinked network on the surface of the graphene, filling the gaps after the graphene aerogel is loaded with nanoparticles, greatly extending the diffusion path of the corrosion medium, and increasing the impact resistance of the coating.
[0019] 3、In the preparation of the graphene aerogel, the addition of the phytic acid solution strengthens the gel skeleton by hydrogen bonding and coordination with Ce³⁺ ions due to its multi-dentate coordination structure inserted into the voids of the three-dimensional porous graphene, thereby preventing the collapse of the three-dimensional graphene pore structure during the drying process. After the pretreatment of the sodium-based montmorillonite, the interlayer spacing of the sodium-based montmorillonite is expanded, and the three-dimensional voids of the graphene modified by the phytic acid solution, Ce³⁺ and ammonium molybdate are further filled, thereby improving the structural stability. The mutual cooperation of the phytic acid solution and the pretreated organic montmorillonite improves the mechanical properties and corrosion resistance of the coating. DETAILED DESCRIPTION
[0020] The technical solutions in the present application will be clearly and completely described below in combination with the embodiments in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way limits the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0021] Embodiment 1 This embodiment prepares a corrosion-resistant graphene coating.
[0022] A corrosion-resistant graphene coating, according to weight parts, comprises the following components: 90 parts of water-based epoxy resin, 9 parts of graphene corrosion-resistant filler, 0.8 parts of leveling agent, 0.8 parts of defoamer BYK-065, 8 parts of curing agent and 0.25 parts of BYK161.
[0023] The preparation method of the three-dimensional porous graphene gel in the graphene anticorrosive filler in this example is as follows: 13 parts of graphene oxide are dispersed in deionized water, ultrasonic is performed for 1.5 h, 4 parts of sodium perborate and 2 parts of sodium bicarbonate are added, 60℃ is maintained for 3 h, then 13 parts of ethylenediamine is added, the temperature is raised to 90℃ and reaction is performed for 6.5 h, and drying is performed for 8 h to obtain the three-dimensional porous graphene gel.
[0024] The preparation method of the graphene anticorrosive filler in this example is as follows: S1: 13 parts of the three-dimensional porous graphene gel are immersed in 40 parts of a phytic acid solution with a mass fraction of 63%, vacuum impregnation is performed at 35℃ for 35 min, the pH is adjusted to 6, 3 parts of cerium nitrate is added and stirred uniformly, reaction is performed for 55 min, 2 parts of ammonium molybdate is added and mixed uniformly, the temperature is raised to 65℃ and reaction is performed for 1.5 h, and drying is performed to obtain the graphene aerogel; S2: 2.5 parts of sodium-based montmorillonite is dispersed in 15 parts of N,N-dimethylformamide, ultrasonic is performed for 1 h, then 1 part of toluene diisocyanate and 0.25 parts of triethylamine are added, the temperature is raised to 80℃ under nitrogen protection, stirring reaction is performed for 3 h; then 0.65 parts of polyethylene glycol monomethyl ether is added dropwise, and reaction is continuously performed for 2 h, centrifugal washing and drying are performed to obtain the pretreated organic montmorillonite; S3: the graphene aerogel is immersed in an ethanol solution containing 1wt% of n-octyl triethoxysilane, reaction is performed at room temperature for 4 h, the pretreated organic montmorillonite is added and stirred uniformly, vacuum impregnation treatment is performed three times, and freeze-drying is performed to obtain the graphene anticorrosive filler, and the mass ratio of the graphene aerogel to the pretreated organic montmorillonite is 1:0.2.
[0025] Example 2 A kind of anticorrosive graphene coating is prepared in this example.
[0026] An anticorrosive graphene coating, according to parts by weight, includes the following components: 80 parts of water-based epoxy resin, 8.5 parts of graphene anticorrosive filler, 0.5 parts of leveling agent, 0.5 parts of defoamer BYK-065, 7 parts of phthalic anhydride and 0.2 parts of BYK161.
[0027] The preparation method of the three-dimensional porous graphene gel in the graphene anticorrosive filler in this example is as follows: 10 parts of graphene oxide is dispersed in deionized water, ultrasonic is performed for 1 h, 3 parts of sodium perborate and 1.5 parts of sodium bicarbonate are added, 60℃ is maintained for 3 h, then 10 parts of ethylenediamine is added, the temperature is raised to 90℃ and reaction is performed for 6 h, and drying is performed for 7 h to obtain the three-dimensional porous graphene gel.
[0028] The preparation method of the graphene anticorrosive filler in this example is as follows: S1: 10 parts of three-dimensional porous graphene gel were immersed in 10 parts of a 60% by mass phytic acid solution, vacuum impregnated at 30°C for 30 min, adjusted to pH 5, 2 parts of cerium nitrate were added and stirred uniformly, reacted for 50 min, 1.5 parts of ammonium molybdate were added and mixed uniformly, and the temperature was raised to 60°C to react for 1 h, and graphene aerogel was obtained by drying; S2: 2 parts of sodium-based montmorillonite were dispersed in 15 parts of N,N-dimethylformamide, and ultrasonic treatment was performed for 1 h, then 0.8 parts of toluene diisocyanate and 0.2 parts of triethylamine were added, the temperature was raised to 75°C under nitrogen protection, and stirring reaction was performed for 3 h; then 0.5 parts of polyethylene glycol monomethyl ether were added dropwise, and the reaction was continued for 2 h, and the pretreated organic montmorillonite was obtained by centrifugal washing and drying; S3: the graphene aerogel was immersed in an ethanol solution containing 1 wt% of n-octyl triethoxysilane, and the reaction was performed at room temperature for 4 h, the pretreated organic montmorillonite was added and stirred uniformly, vacuum impregnation treatment was performed three times, and the graphene anticorrosive filler was obtained by freeze-drying, and the mass ratio of the graphene aerogel to the pretreated organic montmorillonite was 1:0.1.
[0029] Example 3 In this example, an anticorrosive graphene coating was prepared.
[0030] An anticorrosive graphene coating, according to parts by mass, comprises the following components: 95 parts of water-based epoxy resin, 9.5 parts of graphene anticorrosive filler, 1 part of acrylate leveling agent, 1 part of defoamer BYK-065, 9 parts of m-xylene diamine, and 0.3 parts of BYK18.
[0031] In this example, the preparation method of the three-dimensional porous graphene gel in the graphene anticorrosive filler is as follows: 15 parts of graphene oxide were dispersed in deionized water, ultrasonic treatment was performed for 1.3 h, 5 parts of sodium peroxoborate and 2.5 parts of sodium bicarbonate were added, the temperature was raised to 60°C, and the reaction was performed for 3 h, then 15 parts of ethylenediamine were added, the temperature was raised to 90°C, and the reaction was performed for 7 h, and the three-dimensional porous graphene gel was obtained by drying for 9 h.
[0032] In this example, the preparation method of the graphene anticorrosive filler is as follows: S1: 15 parts of three-dimensional porous graphene gel were immersed in 75 parts of a 65% by mass phytic acid solution, vacuum impregnated at 40°C for 40 min, adjusted to pH 6, 4 parts of cerium nitrate were added and stirred uniformly, reacted for 60 min, 3 parts of ammonium molybdate were added and mixed uniformly, the temperature was raised to 65°C to react for 2 h, and graphene aerogel was obtained by drying; S2: 3 parts of sodium-based montmorillonite was dispersed in 15 parts of N, N-dimethylformamide by weight, after ultrasonic for 1 h, 1.2 parts of toluene diisocyanate and 0.3 parts of triethylamine were added, and the temperature was raised to 80℃ under nitrogen protection, and stirred for 3 h; then 0.8 parts of polyethylene glycol monomethyl ether was added dropwise, and the reaction was continued for 2 h, and the pretreated organic montmorillonite was obtained by centrifugal washing and drying; S3: the graphene aerogel was immersed in an ethanol solution containing 1wt% n-octyl triethoxysilane, and reacted at room temperature for 4 h, then the pretreated organic montmorillonite was added and stirred uniformly, and vacuum impregnation treatment was performed three times, and freeze-drying was performed to obtain the graphene anticorrosive filler, and the mass ratio of the graphene aerogel to the pretreated organic montmorillonite was 1:0.3.
[0033] Example 4 In this embodiment, a kind of anticorrosive graphene coating is prepared.
[0034] A kind of anticorrosive graphene coating, comprising the following components by weight: 83 parts of water-based epoxy resin, 8.7 parts of graphene anticorrosive filler, 0.6 parts of leveling agent, 0.6 parts of defoamer BYK-065, 7.5 parts of isophorone diamine and 0.23 parts of mixed dispersant mixed according to 1:1 of BYK161 and BYK180.
[0035] In this embodiment, the preparation method of three-dimensional porous graphene gel in graphene anticorrosive filler is as follows: 12 parts of graphene oxide is dispersed in deionized water by weight, ultrasonic for 1.2 h, 3.5 parts of sodium peroxoborate and 1.8 parts of sodium bicarbonate are added, 60℃, 3 h, then 12 parts of ethylenediamine is added and the temperature is raised to 90℃ and reacted for 6.3 h, and dried for 7.5 h to obtain three-dimensional porous graphene gel.
[0036] In this embodiment, the preparation method of graphene anticorrosive filler is as follows: S1: 12 parts of three-dimensional porous graphene gel is immersed in 20 parts of phytic acid solution with a mass fraction of 61%, vacuum impregnation for 30-40 min at 32℃, adjust the pH to 5, add 2.5 parts of cerium nitrate and stir uniformly, react for 53 min, add 1.8 parts of ammonium molybdate and mix uniformly, raise the temperature to 62℃ and react for 1.2 h, and dry to obtain graphene aerogel; S2: 2.3 parts of sodium-based montmorillonite is dispersed in 15 parts of N, N-dimethylformamide by weight, after ultrasonic for 1 h, 0.9 parts of toluene diisocyanate and 0.23 parts of triethylamine are added, and the temperature is raised to 76℃ under nitrogen protection, and stirred for 3 h; then 0.6 parts of polyethylene glycol monomethyl ether is added dropwise, and the reaction is continued for 2 h, and the pretreated organic montmorillonite is obtained by centrifugal washing and drying; S3: the graphene aerogel is immersed in an ethanol solution containing 1 wt% of n-octyl triethoxysilane, reacts at room temperature for 4 h, the pretreated organic montmorillonite is added, stirred uniformly, treated by vacuum impregnation method for three times, freeze-dried, and a graphene anticorrosive filler is obtained, wherein the mass ratio of the graphene aerogel to the pretreated organic montmorillonite is 1:0.15.
[0037] Example 5 This example prepares an anticorrosive graphene coating.
[0038] An anticorrosive graphene coating, comprising the following components in parts by weight: 92 parts of water-based epoxy resin, 9.3 parts of graphene anticorrosive filler, 0.9 parts of acrylate leveling agent, 0.9 parts of defoamer BYK-065, 8.5 parts of isophorone diamine, and 0.28 parts of BYK180.
[0039] In this example, the preparation method of the three-dimensional porous graphene gel in the graphene anticorrosive filler is as follows: 14 parts of graphene oxide is dispersed in deionized water, ultrasonic for 1.4 h, 4.5 parts of sodium peroxoborate and 2.3 parts of sodium bicarbonate are added, 60℃, 3 h, then 14 parts of ethylenediamine is added, heated to 90℃ and reacted for 6.7 h, and dried for 8.5 h to obtain a three-dimensional porous graphene gel.
[0040] In this example, the preparation method of the graphene anticorrosive filler is as follows: S1: 14 parts of three-dimensional porous graphene gel is immersed in 60 parts of a phytic acid solution with a mass fraction of 64%, vacuum impregnated at 38℃ for 38 min, the pH is adjusted to 6, 3.5 parts of cerium nitrate is added and stirred uniformly, reacts for 58 min, 2.5 parts of ammonium molybdate is added and mixed uniformly, heated to 64℃ and reacted for 1.8 h, and dried to obtain a graphene aerogel; S2: 2.8 parts of sodium-based montmorillonite is dispersed in 15 parts of N,N-dimethylformamide, ultrasonic for 1 h, then 1.1 parts of toluene diisocyanate and 0.28 parts of triethylamine are added, heated to 78℃ under nitrogen protection, and stirred to react for 3 h; then 0.75 parts of polyethylene glycol monomethyl ether is added dropwise, and continues to react for 2 h, centrifuged, washed and dried to obtain a pretreated organic montmorillonite; S3: the graphene aerogel is immersed in an ethanol solution containing 1 wt% of n-octyl triethoxysilane, reacts at room temperature for 4 h, the pretreated organic montmorillonite is added, stirred uniformly, treated by vacuum impregnation method for three times, freeze-dried, and a graphene anticorrosive filler is obtained, wherein the mass ratio of the graphene aerogel to the pretreated organic montmorillonite is 1:0.25.
[0041] The difference between Comparative Example 1 and Example 1 is that no phytic acid solution is added in the preparation of the three-dimensional graphene oxide aerogel.
[0042] The difference between Comparative Example 2 and Example 1 is that sodium-based montmorillonite is used instead of pretreated montmorillonite in the preparation of the graphene anticorrosive filler.
[0043] The difference between Comparative Example 3 and Example 1 is that no phytic acid solution is added in the preparation of the three-dimensional graphene oxide aerogel, and sodium-based montmorillonite is used instead of pretreated montmorillonite in the preparation of the graphene anticorrosive filler.
[0044] According to the national standard GB / T1732-2020, the impact resistance of the coating is tested, and the results are shown in Table 1.
[0045] According to GB / T 10125-2021, the corrosion performance of the coating is determined by simulating the salt spray environment, and the results are shown in Table 1.
[0046] Table 1 From the above Examples 1-5 and the data in Table 1, it can be seen that the adhesion and corrosion protection effect of the anticorrosive coating prepared by the present application are significantly improved.
[0047] From the combination of Example 1 and Comparative Examples 1 and 2 and the data in Table 1, it can be seen that the adhesion and salt spray resistance of the anticorrosive coating prepared by Comparative Example 1 are significantly reduced, which proves that the phytic acid solution improves the impact resistance and corrosion protection ability of the coating on the metal surface.
[0048] From the combination of Example 1 and Comparative Examples 2 and the data in Table 1, it can be seen that if the sodium-based montmorillonite is not pretreated, the impact resistance and corrosion protection ability of the coating are significantly reduced, which proves that the pretreatment of the sodium-based montmorillonite improves the impact resistance and corrosion protection ability of the coating.
[0049] From the combination of Example 1 and Comparative Examples 1-3 and the data in Table 1, it can be seen that the addition of phytic acid solution and the pretreatment of sodium-based montmorillonite can synergistically enhance the impact resistance and corrosion protection ability of the coating prepared by the present application. This is because the addition of phytic acid solution enhances the electrochemical corrosion protection ability of the coating, and the pretreatment of sodium-based montmorillonite enhances the physical barrier corrosion protection ability of the coating surface. The two work together to enhance the overall ability of the coating.
[0050] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent substitutions or changes within the technical scope disclosed by the present application and according to the technical solution and inventive concept of the present application, which should be covered within the protection scope of the present application.
Claims
1. A corrosion-resistant graphene coating, characterized in that: By weight, it comprises the following components: 80-95 parts waterborne epoxy resin, 8.5-9.5 parts graphene anti-corrosion filler, 0.5-1 part leveling agent, 0.5-1 part defoamer, 7-9 parts curing agent and 0.2-0.3 parts dispersant; The graphene anticorrosive filler is graphene oxide loaded with phytic acid metal complex and pretreated organomontmorillonite. The pretreated organomontmorillonite is obtained by pretreating sodium-based montmorillonite with toluene diisocyanate and polyethylene glycol monomethyl ether.
2. The anti-corrosion graphene coating according to claim 1, characterized in that: The preparation method of the graphene anti-corrosion filler is as follows: S1: By weight, immerse 10-15 parts of three-dimensional porous graphene gel in 10-75 parts of phytic acid solution, vacuum impregnate at 30-40℃ for 30-40 min, adjust the pH to 5-6, add 2-4 parts of cerium nitrate and stir evenly, react for 50-60 min, add 1.5-3 parts of ammonium molybdate dropwise and mix evenly, heat to 60-65℃ and react for 1-2 h, and dry to obtain graphene aerogel; S2: By weight, 2-3 parts of sodium montmorillonite are dispersed in 15 parts of N,N-dimethylformamide. After sonication for 1 hour, 0.8-1.2 parts of toluene diisocyanate and 0.2-0.3 parts of triethylamine are added. The mixture is heated to 75-80°C under nitrogen protection and stirred for 3 hours. Then, 0.5-0.8 parts of polyethylene glycol monomethyl ether are added dropwise, and the reaction is continued for 2 hours. The mixture is then centrifuged, washed, and dried to obtain pretreated organomontmorillonite. S3: Graphene aerogel was immersed in an ethanol solution containing 1 wt% n-octyltriethoxysilane and reacted at room temperature for 4 h. Pretreated organomontmorillonite was added, stirred evenly, and treated three times by vacuum impregnation. The mixture was then freeze-dried to obtain graphene anti-corrosion filler.
3. The anti-corrosion graphene coating according to claim 2, characterized in that: The preparation method of the three-dimensional porous graphene gel is as follows: by weight, 10-15 parts of graphene oxide are dispersed in deionized water, sonicated for 1-1.5 h, 3-5 parts of sodium perborate and 1.5-2.5 parts of sodium bicarbonate are added, and the mixture is heated to 60°C for 3 h. Then, 10-15 parts of ethylenediamine are added and the temperature is raised to 90°C for 6-7 h. The mixture is then dried for 7-9 h to obtain the three-dimensional porous graphene gel.
4. The anti-corrosion graphene coating according to claim 2, characterized in that: The mass ratio of the graphene aerogel to the pretreated organomontmorillonite is 1:(0.1-0.3).
5. The anti-corrosion graphene coating according to claim 2, characterized in that: The phytic acid solution has a mass fraction of 60-65%.
6. The anti-corrosion graphene coating according to claim 1, characterized in that: The curing agent is any one of phthalic anhydride, isophorone diamine, and m-xylene diamine.
7. The anti-corrosion graphene coating according to claim 1, characterized in that: The defoamer is an organosilicon defoamer, BYK-065.
8. The anti-corrosion graphene coating according to claim 1, characterized in that: The dispersant is BYK161 and / or BYK180.
9. The anti-corrosion graphene coating according to claim 1, characterized in that: The leveling agent is an acrylate leveling agent.
10. A method for preparing an anti-corrosion graphene coating according to any one of claims 1-9, characterized in that: Its preparation method is as follows: After uniformly mixing waterborne epoxy resin, graphene anti-corrosion filler, leveling agent, defoamer and dispersant, a curing agent is added and thoroughly mixed to obtain an anti-corrosion graphene coating.