Heavy-duty anti-corrosion coating applied to outer wall of wind power generation tower drum and preparation method of heavy-duty anti-corrosion coating

Abstract

The invention discloses a heavy anti-corrosion coating applied to the outer wall of a wind power generation tower drum and a preparation method of the heavy anti-corrosion coating, and belongs to the technical field of heavy anti-corrosion coatings. The paint comprises a primer, an intermediate paint and a finish paint in parts by weight, and the primer comprises the following components in parts by weight: 18-22 parts of bisphenol A epoxy resin, 60-70 parts of zinc powder, 4-8 parts of zinc phosphate, 3-6 parts of a reactive diluent, 3-6 parts of self-made modified montmorillonite, 0.3-0.5 part of fumed silica, 2-5 parts of titanium dioxide, 0.1-0.3 part of carbon black, 0.2-0.5 part of polyamide wax and 0.1-0.3 part of a defoaming agent; 8-12 parts of a modified phenolic aldehyde amine curing agent and 0.1-0.5 part of an accelerant. According to the heavy anti-corrosion coating disclosed by the invention, interlayer combination is promoted through modification of the filler, more efficient and more lasting protection is realized under the synergistic effect of multilayer and multi-mechanism barrier superposition, the damp-heat aging resistance and corrosion resistance of a paint film of the heavy anti-corrosion coating are improved, and longer protection on the outer wall of a power generation tower drum is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of heavy-duty anti-corrosion coatings, and specifically, relates to a heavy-duty anti-corrosion coating applied to the outer wall of a wind power generation tower barrel and a preparation method thereof. Background Art

[0002] With the increasing global energy demand and the increasingly prominent environmental problems brought about by fossil energy, the development and utilization of clean and renewable energy have become a global consensus and an important development direction. Wind power generation uses natural wind energy to drive a generator and convert wind energy into electrical energy. Its power generation process does not produce greenhouse gases, air pollutants or waste water, and its impact on the environment is much smaller than that of traditional thermal power generation. It is recognized as a clean and sustainable energy solution.

[0003] As one of the largest energy-consuming countries in the world, China is actively promoting the transformation and upgrading of its energy structure and vigorously developing renewable energy including wind power generation. Especially in some regions with superior natural conditions, the development potential of wind energy resources is huge. In particular, Yunnan, located in the southwest of China, has a unique geographical location and climate conditions, forming significant three-dimensional climate characteristics; this diverse climate and terrain environment have given birth to rich wind energy resources, providing unique natural advantages for the development of wind power generation.

[0004] Existing anti-corrosion coatings for wind power generation tower barrels, such as the Chinese invention patent with the application number: CN202310336118.0, disclose a salt spray-resistant acrylic topcoat for a wind power generation tower barrel and a preparation method thereof, including the following raw materials in parts by weight: 50-65 parts of fluorosilicon-modified acrylic resin, 8-13 parts of titanium dioxide, 5-10 parts of graphene-supported copper oxide, 2-5 parts of fluorine-based polyether-modified polysiloxane, 2-3 parts of a leveling agent, 1-2 parts of a toughening agent, 8-11 parts of a curing agent, 8-11 parts of a diluent, and 0-5 parts of other pigments. Although the above existing technology is also applied to wind power generation tower barrels, its core concern mainly focuses on the marine environment and mainly emphasizes the salt spray resistance of the coating.

[0005] Different from the marine environment, the wind power tower barrels applied in Yunnan are usually built on mountain slopes with strong winds and generally at high altitudes. In the high-altitude areas of Yunnan, the temperature difference between day and night is often large. The outer wall of the steel structure tower barrel will bring periodic mechanical stress to the coating during thermal expansion and contraction, which is likely to cause the coating to crack or peel off. At the same time, under such special climatic conditions in Yunnan, the humid and hot cycling environment will make the paint prone to hydrolysis in this environment, the coating permeability increases, and the corrosion process is accelerated. More challenging is that the mountainous areas in Yunnan face the combined effects of extremely strong ultraviolet radiation, significant day-night temperature differences, and high humidity. Coupled with the fact that strong winds in mountainous areas may carry dust, these complex environments jointly pose higher requirements for the protection of the outer walls of wind power tower barrels in Yunnan. However, in the current existing technologies, there is no heavy-duty anti-corrosion coating specifically optimized for the regional characteristics of Yunnan for the outer walls of wind power tower barrels.

[0006] Therefore, in order to fill the technical gap in the market, the present application provides a heavy-duty anti-corrosion coating for the outer wall of a wind power tower barrel and a preparation method thereof. Summary of the Invention

[0007] To solve the defect problems in the above technical solutions; the purpose of the present invention is to provide a heavy-duty anti-corrosion coating for the outer wall of a wind power tower barrel and a preparation method thereof. The purpose of the present invention can be achieved through the following technical solutions: A heavy-duty anti-corrosion coating for the outer wall of a wind power tower barrel includes a primer, an intermediate coat, and a topcoat; by weight, the primer includes: 18-22 parts of bisphenol A epoxy resin, 60-70 parts of zinc powder, 4-8 parts of zinc phosphate, 3-6 parts of active diluent, 3-6 parts of self-made modified montmorillonite, 0.3-0.5 parts of fumed silica, 2-5 parts of titanium dioxide, 0.1-0.3 parts of carbon black, 0.2-0.5 parts of polyamide wax, 0.1-0.3 parts of defoamer; 8-12 parts of modified phenolic amine curing agent, 0.1-0.5 parts of accelerator. The intermediate coat has the following composition, including: 16-22 parts of bisphenol A epoxy resin, 5-10 parts of active diluent, 5-8 parts of self-made modified montmorillonite, 25-35 parts of mica iron oxide, 8-15 parts of barium sulfate, 3-7 parts of talc powder, 0.5-0.8 parts of fumed silica, 2-5 parts of titanium dioxide, 0.1-0.3 parts of carbon black, 0.2-0.5 parts of polyamide wax, 0.2-0.5 parts of defoamer, 7-11 parts of modified phenolic amine curing agent, 0.1-0.5 parts of accelerator. The topcoat has the following composition, including: 56-72 parts of fluorocarbon resin, 0.6-2.0 parts of fluorosilane-functionalized silicon carbide-coated carbon nanotubes, 18-25 parts of titanium dioxide, 0.8-1.6 parts of UV absorber, 0.7-1.4 parts of light stabilizer, 0.8-1.5 parts of dispersant, 0.2-0.5 parts of leveling agent, 0.3-0.5 parts of polyamide wax, 15-25 parts of solvent, 18-28 parts of aliphatic isocyanate curing agent.

[0008] The active diluent in the primer and intermediate paint is one of mono-epoxy glycidyl ether active diluents or bis-epoxy glycidyl ether active diluents; The bisphenol A epoxy resin in the primer and intermediate paint is any one of bisphenol A E44 epoxy resin and bisphenol A E51 epoxy resin; The defoamer in the primer and intermediate paint is BYK-066 N; The accelerator in the primer and intermediate paint is DMP-30; The titanium dioxide is weather-resistant rutile titanium dioxide; The fluorocarbon resin is FEVE type fluorocarbon resin; The UV absorber is one of benzophenone and benzotriazole; The light stabilizer is one of BASF 944 and BASF 622; The solvent is one of butyl acetate and xylene; The dispersant is EFKAPX 4330; The leveling agent is Capstone FS-50.

[0009] The preparation method of the fluorosilane-functionalized silicon carbide-coated carbon nanotubes is as follows: Weigh the silicon carbide-coated carbon nanotubes and add them to anhydrous ethanol, and ultrasonically disperse to obtain a suspension; Transfer it to a three-necked flask, slowly add glacial acetic acid to adjust the pH of the reaction system to 4.5; Continue magnetic stirring and slowly add perfluorooctyltriethoxysilane, after stirring evenly, then slowly add deionized water to control the hydrolysis rate; Subsequently, heat the reaction system to 70 °C and keep magnetic stirring to continue the reaction for 2 h; After the reaction is completed, naturally cool to room temperature, filter and collect the solid product; And wash the product repeatedly with sufficient anhydrous ethanol to completely remove the unreacted substances; Finally, place it in a vacuum drying oven and dry to constant weight to prepare the fluorosilane-functionalized silicon carbide-coated carbon nanotubes.

[0010] The CAS number of the perfluorooctyltriethoxysilane is: 51851-37-7.

[0011] The preparation method of the silicon carbide-coated carbon nanotubes: Place the polycarbosilane in n-hexane and ultrasonically disperse; Then take the carbon nanotubes and add them thereto; And heat the reaction vessel to 60 °C and continue ultrasonic treatment for 30 min, then place the mixture in a fume hood and let the solvent naturally volatilize at room temperature to obtain the dried polycarbosilane-coated carbon nanotubes; Transfer to a quartz crucible, put it into a tube furnace under an inert atmosphere, heat to 240 °C and keep it for 90 min; Then continue to heat to 1150 °C and keep it for 60 min; After the reaction is completed, continue to maintain the inert environment and naturally cool to room temperature to prepare the silicon carbide-coated carbon nanotubes.

[0012] Among them, the heating rate of the tube furnace is 10 °C / min.

[0013] The preparation method of the self-made modified montmorillonite: Take montmorillonite, disperse it in distilled water, then add sodium carbonate solution, heat up to 95 °C, and stir magnetically for 20 min; Subsequently, add dimethyldistearylammonium chloride to the mixed solution, continue stirring, and filter to obtain an intermediate product after the reaction is completed; Then take the intermediate product and ricinoleic acid, place them in a reaction vessel, heat up to 60 °C, stir and react for 2 h, take out the mixture, and wash it repeatedly with methanol; Place the reaction product in a vacuum drying oven and dry it thoroughly to constant weight, and grind it into a fine powder, and sieve it through a 200-mesh sieve to prepare the self-made modified montmorillonite.

[0014] A heavy-duty anti-corrosion coating applied to the outer wall of a wind power generation tower barrel, including a primer, an intermediate paint, and a topcoat; The preparation method of the primer is: Add bisphenol A epoxy resin and an active diluent to a stirring kettle, stir and mix evenly at a low speed of 300-400 revolutions per minute, then add zinc phosphate, zinc powder, self-made modified montmorillonite, defoamer, fumed silica, titanium dioxide, carbon black, polyamide wax, and stir and disperse for 20 min at 600-800 revolutions per minute; Finally, add a modified phenolic amine curing agent and an accelerator, stir for 3 min, and mix evenly to prepare the primer.

[0015] The preparation method of the intermediate paint is: Add bisphenol A epoxy resin and an active diluent to a stirring kettle, stir and mix evenly at a low speed of 300-400 revolutions per minute, then add mica iron oxide, barium sulfate, talc powder, fumed silica, titanium dioxide, carbon black, polyamide wax, defoamer, self-made modified montmorillonite, and stir and disperse for 30 min at 500-600 revolutions per minute; Finally, add a modified phenolic amine curing agent and an accelerator, stir for 3 min, and mix evenly to prepare the intermediate paint.

[0016] The preparation method of the topcoat is: Add a solvent and a fluorocarbon resin to a stirring kettle, stir at a low speed of 300-400 revolutions per minute until the resin is completely dissolved; Then add titanium dioxide, UV absorber, light stabilizer, dispersant, leveling agent, polyamide wax, fluorosilane-functionalized silicon carbide-coated carbon nanotubes, and stir and disperse for 40 min at 600-800 revolutions per minute; Finally, add an aliphatic isocyanate curing agent, stir for 3 min, and mix evenly to prepare the topcoat.

[0017] The beneficial effects of the present invention are: 1. In the self-made modified montmorillonite in the heavy-duty anti-corrosion coating of this application, through cation exchange reaction, dimethyldistearylammonium chloride replaces the cations between montmorillonite layers and enters between the montmorillonite layers, increasing the montmorillonite layer spacing; and it can interact with the carboxylic acid groups existing in the castor oil acid introduced subsequently through hydrogen bonds. The entry of castor oil acid molecules will further expand the montmorillonite layer spacing, making it more uniform and fine in the intermediate paint and greatly extending the gas diffusion path; and the introduced castor oil acid contains double bonds, which can capture the oxygen that may penetrate into the intermediate paint, thereby providing a more lasting improvement in the barrier performance of the heavy-duty anti-corrosion coating; and the self-made modified montmorillonite is also added to the primer, which can also improve the barrier performance of the primer to a certain extent. 2. The fluorosilane-functionalized silicon carbide-coated carbon nanotubes of this application. The carbon nanotubes themselves have relatively high modulus and tensile strength ratio, which can effectively improve the toughness and crack resistance of the topcoat; using silicon carbide to coat the carbon nanotubes can change the surface energy of the carbon nanotubes to a certain extent, which is helpful for their dispersion in the topcoat; and silicon carbide has certain absorption and scattering ability in the ultraviolet band, which can improve the anti-aging performance of the topcoat material; subsequently, long-chain perfluorooctyltriethoxysilane is used. It contains ethoxy groups, and the silanol groups generated after hydrolysis can undergo a condensation reaction with the Si-OH groups on the surface of silicon carbide to form stable siloxane bonds, thereby firmly grafting the long-chain perfluorooctyl onto the surface of silicon carbide in the form of covalent bonds; and a large number of C-F bonds in the perfluorooctyl make it difficult for pollutants to adhere, making the topcoat have a certain self-cleaning effect. 3. In the heavy-duty anti-corrosion coating of this application, fluorosilane-functionalized silicon carbide-coated carbon nanotubes are introduced into the topcoat, and self-made modified montmorillonite is introduced into the intermediate paint; the active sites in the microscopic interface formed by the self-made modified montmorillonite and the resin can interact with the polar groups in the topcoat, enhancing the interlayer adhesion between the topcoat and the intermediate paint; by modifying the fillers to promote interlayer bonding, through the superposition of multi-level and multi-mechanism barriers and the synergistic effect, more efficient and lasting protection is achieved, improving the anti-hydrothermal aging and anti-corrosion performance of the paint film of the heavy-duty anti-corrosion coating and realizing longer-term protection for the power generation tower barrel. Detailed implementation mode

[0018] To make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with embodiments. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. In addition, for the numerical ranges in the present invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each intermediate value within any stated value or stated range, as well as each smaller range between any other stated value or intermediate value within the stated range, is also included in the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0019] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Although the present invention only describes preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials related to the documents. In case of conflict with any incorporated document, the content of this specification shall prevail.

[0020] Without departing from the scope or spirit of the present invention, various improvements and changes can be made to the specific embodiments of the specification of the present invention, which are obvious to those skilled in the art. Other embodiments obtained from the specification of the present invention are obvious to those skilled in the art. The specification and embodiments of the present invention are merely exemplary.

[0021] Regarding the terms "comprising", "including", "having", "containing", etc. used herein, they are all open-ended terms, meaning including but not limited to.

[0022] The "parts" mentioned in the following embodiments are all parts by weight.

[0023] Example 1 A heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel, comprising a primer, an intermediate paint, and a topcoat; by weight parts, the primer comprises: 18 parts of bisphenol A epoxy resin, 60 parts of zinc powder, 4 parts of zinc phosphate, 3 parts of active diluent, 3 parts of self-made modified montmorillonite, 0.3 parts of fumed silica, 2 parts of titanium dioxide, 0.1 part of carbon black, 0.2 part of polyamide wax, 0.1 part of defoamer; 8 parts of modified phenolic amine curing agent, 0.1 part of accelerator.

[0024] The intermediate paint comprises: 16 parts of bisphenol A epoxy resin, 5 parts of active diluent, 5 parts of self-made modified montmorillonite, 25 parts of mica iron oxide, 8 parts of barium sulfate, 3 parts of talc powder, 0.5 parts of fumed silica, 2 parts of titanium dioxide, 0.1 part of carbon black, 0.2 part of polyamide wax, 0.2 part of defoamer, 7 parts of modified phenolic amine curing agent, 0.1 part of accelerator.

[0025] The topcoat includes: 56 parts of fluorocarbon resin, 0.6 parts of fluorosilane-functionalized silicon carbide-coated carbon nanotubes, 18 parts of titanium dioxide, 0.8 parts of UV absorber, 0.7 parts of light stabilizer, 0.8 parts of dispersant, 0.2 parts of leveling agent, 0.3 parts of polyamide wax, 15 parts of solvent, and 18 parts of aliphatic isocyanate curing agent.

[0026] The reactive diluent in the primer and intermediate coat is one of mono-epoxy glycidyl ether-based reactive diluents or bis-epoxy glycidyl ether-based reactive diluents.

[0027] The bisphenol A epoxy resin in the primer is bisphenol A type E44 epoxy resin; The bisphenol A epoxy resin in the intermediate coat is bisphenol A type E44 epoxy resin; The defoamer in the primer and intermediate coat is BYK-066 N; The accelerator in the primer and intermediate coat is DMP-30; The titanium dioxide is weather-resistant rutile titanium dioxide, purchased from Shijiazhuang Yuandu Chemical Technology Co., Ltd.; The fluorocarbon resin is FEVE type fluorocarbon resin, purchased from Shanghai Teflon New Materials Technology Co., Ltd.; The UV absorber is benzotriazole; The light stabilizer is BASF 622; The solvent is butyl acetate; The dispersant is EFKAPX 4330; The leveling agent is Capstone FS-50.

[0028] Preparation method of fluorosilane-functionalized silicon carbide-coated carbon nanotubes: Weigh 1 g of silicon carbide-coated carbon nanotubes and add them to 250 ml of absolute ethanol, ultrasonically disperse for 30 min to obtain a uniform suspension; transfer it to a three-necked flask, slowly add glacial acetic acid to adjust the pH of the reaction system to 4.5; under continuous magnetic stirring, slowly add a total of 0.4 g of perfluorooctyltriethoxysilane, stir evenly, and then slowly add a total of 2 ml of deionized water to control the hydrolysis rate; then heat the reaction system to 70 °C and keep magnetic stirring to continue the reaction for 2 h; after the reaction is completed, naturally cool to room temperature, filter and collect the solid product; wash the product repeatedly with sufficient absolute ethanol to completely remove the unreacted substances; finally, place it in a vacuum drying oven and dry to constant weight to prepare fluorosilane-functionalized silicon carbide-coated carbon nanotubes.

[0029] The CAS number of the perfluorooctyltriethoxysilane is: 51851-37-7.

[0030] Preparation method of silicon carbide-coated carbon nanotubes: Weigh 1 g of polycarbosilane and place it in 100 ml of n-hexane, and ultrasonically disperse it for 15 min to make it fully dispersed; then weigh 5 g of carbon nanotubes and add them to the above mixture. Place the reaction vessel in a water bath and heat it to 60 °C, and continue ultrasonic treatment for 30 min to make the polycarbosilane fully adsorbed on the surface of the carbon nanotubes; then place the mixture in a fume hood and let the solvent naturally volatilize at room temperature to obtain dry polycarbosilane-coated carbon nanotubes; transfer the dry powder to a clean quartz crucible, place it in a tube furnace under an inert atmosphere, heat it to 240 °C, and keep it warm for 90 min for preliminary crosslinking and curing; then continue to heat it to 1150 °C under the protection of an inert atmosphere and keep it warm for 60 min to make the polycarbosilane completely pyrolyzed and converted into silicon carbide; after the reaction is completed, continue to maintain an inert environment and naturally cool it to room temperature, and the silicon carbide-coated carbon nanotubes are prepared.

[0031] Among them, the heating rate of the tube furnace is 10 °C / min; Preparation method of self-made modified montmorillonite: Weigh 8 g of montmorillonite, disperse it in 200 ml of distilled water, then add 10 ml of 15% mass percentage sodium carbonate solution, then heat it to 95 °C, and stir magnetically for 20 min. Then add 10 g of distearyldimethylammonium chloride to the mixed solution and continue stirring for 20 min; after the reaction is completed, filter to obtain a solid precipitate as an intermediate product; then weigh 8 g of the intermediate product and 16 g of ricinoleic acid, place them in a reaction vessel and heat it to 60 °C, stir and react for 2 h, take out the mixture, and wash it repeatedly with methanol to remove unreacted substances; then place the reaction product in a vacuum drying oven and dry it thoroughly to constant weight, and grind it into fine powder, and sieve it through a 200-mesh sieve to prepare the self-made modified montmorillonite.

[0032] The montmorillonite is purchased from Shijiazhuang Zhengyu New Material Technology Co., Ltd., and its CEC is 96.5 Cmol(+) / kg; A heavy-duty anti-corrosion coating applied to the outer wall of a wind power generation tower barrel, including a primer, an intermediate paint, and a topcoat; the preparation method of the primer is: add bisphenol A epoxy resin and an active diluent to a stirring kettle, stir and mix evenly at a low speed of 300-400 revolutions per minute, then add zinc phosphate, zinc powder, self-made modified montmorillonite, defoaming agent, fumed silica, titanium dioxide, carbon black, polyamide wax, and stir and disperse for 20 min at 600-800 revolutions per minute; finally add a modified phenolic amine curing agent and a promoter, stir for 3 min, and mix evenly to prepare the primer.

[0033] The preparation method of the intermediate paint is as follows: bisphenol A epoxy resin and active diluent are added into a stirring kettle, and the mixture is stirred at a low speed of 300-400 rpm to be uniformly mixed; then mica iron oxide, barium sulfate, talcum powder, fumed silica, titanium dioxide, carbon black, polyamide wax, defoamer, and homemade modified montmorillonite are added, and the mixture is stirred and dispersed at a speed of 500-600 rpm for 30 minutes; finally, a modified phenolic amine curing agent and an accelerator are added, and the mixture is stirred for 3 minutes. After the mixture is uniformly mixed, the intermediate paint is prepared.

[0034] The preparation method of the topcoat is as follows: adding a solvent and a fluorocarbon resin into a stirring kettle, stirring at a low speed of 300-400 rpm until the resin is completely dissolved; subsequently adding titanium dioxide, a UV absorber, a light stabilizer, a dispersant, a leveling agent, polyamide wax, and fluorosilane functionalized silicon carbide coated carbon nanotubes, stirring and dispersing at 600-800 rpm for 40 minutes; finally adding an aliphatic isocyanate curing agent, stirring for 3 minutes, and mixing evenly to prepare the topcoat.

[0035] Example 2 A heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower, comprising a primer, an intermediate paint and a topcoat; the primer comprises, by weight: 19 parts of bisphenol A epoxy resin, 63 parts of zinc powder, 5 parts of zinc phosphate, 4 parts of active diluent, 4 parts of homemade modified montmorillonite, 0.4 parts of fumed silica, 3 parts of titanium dioxide, 0.2 parts of carbon black, 0.3 parts of polyamide wax and 0.2 parts of a defoaming agent; 9 parts of a modified phenolic amine curing agent and 0.2 parts of an accelerator.

[0036] The intermediate paint comprises: 18 parts of bisphenol A epoxy resin, 6 parts of active diluent, 6 parts of homemade modified montmorillonite, 28 parts of mica iron oxide, 10 parts of barium sulfate, 4 parts of talcum powder, 0.6 parts of fumed silica, 3 parts of titanium dioxide, 0.2 parts of carbon black, 0.3 parts of polyamide wax, 0.3 parts of defoaming agent, 8 parts of modified phenolic amine curing agent, and 0.2 parts of accelerator.

[0037] The topcoat comprises: 60 parts of fluorocarbon resin, 1.0 parts of fluorosilane functionalized silicon carbide coated carbon nanotubes, 20 parts of titanium dioxide, 1 part of UV absorber, 0.9 parts of light stabilizer, 1.0 parts of dispersant, 0.3 parts of leveling agent, 0.4 parts of polyamide wax, 18 parts of solvent, and 21 parts of aliphatic isocyanate curing agent.

[0038] The bisphenol A type epoxy resin in the primer is bisphenol A type E51 epoxy resin; The bisphenol A type epoxy resin in the intermediate paint is bisphenol A type E51 epoxy resin; The active diluent in the primer is a monoepoxy glycidyl ether active diluent; The active diluent in the intermediate paint is a diepoxy glycidyl ether active diluent; The UV absorber is benzophenone; The light stabilizer is BASF 944; The solvent is butyl acetate; Among them, the preparation method of fluoro-silane functionalized silicon carbide-coated carbon nanotubes, the preparation method of self-made modified montmorillonite, and the preparation method of the heavy-duty anti-corrosion coating applied to the outer wall of the wind power generation tower barrel in Example 2 are all the same as those in Example 1.

[0039] Example 3 A heavy-duty anti-corrosion coating applied to the outer wall of a wind power generation tower barrel, including a primer, an intermediate coat, and a top coat; by weight, the primer includes: 20 parts of bisphenol A epoxy resin, 65 parts of zinc powder, 6 parts of zinc phosphate, 5 parts of active diluent, 5 parts of self-made modified montmorillonite, 0.4 parts of fumed silica, 4 parts of titanium dioxide, 0.2 parts of carbon black, 0.4 parts of polyamide wax, 0.2 parts of defoamer; 10 parts of modified phenolic amine curing agent, 0.3 parts of accelerator.

[0040] The intermediate coat includes: 19 parts of bisphenol A epoxy resin, 8 parts of active diluent, 7 parts of self-made modified montmorillonite, 30 parts of micaceous iron oxide, 12 parts of barium sulfate, 5 parts of talc powder, 0.7 parts of fumed silica, 4 parts of titanium dioxide, 0.2 parts of carbon black, 0.4 parts of polyamide wax, 0.4 parts of defoamer, 9 parts of modified phenolic amine curing agent, 0.3 parts of accelerator.

[0041] The top coat includes: 64 parts of fluorocarbon resin, 1 part of fluoro-silane functionalized silicon carbide-coated carbon nanotubes, 22 parts of titanium dioxide, 1 part of UV absorber, 1 part of light stabilizer, 1 part of dispersant, 0.4 parts of leveling agent, 0.4 parts of polyamide wax, 20 parts of solvent, 23 parts of aliphatic isocyanate curing agent.

[0042] The bisphenol A epoxy resin in the primer is bisphenol A E51 epoxy resin; The bisphenol A epoxy resin in the intermediate coat is bisphenol A E51 epoxy resin; The active diluent in the primer and the intermediate coat is a mono-epoxy glycidyl ether type active diluent; The UV absorber is benzotriazole; The light stabilizer is BASF 622; The solvent is xylene; Among them, the preparation method of fluoro-silane functionalized silicon carbide-coated carbon nanotubes, the preparation method of self-made modified montmorillonite, and the preparation method of the heavy-duty anti-corrosion coating applied to the outer wall of the wind power generation tower barrel in Example 3 are all the same as those in Example 1.

[0043] Example 4 A heavy-duty anti-corrosion coating applied to the outer wall of a wind power generation tower barrel, comprising a primer, an intermediate paint, and a topcoat; by weight, the primer comprises: 21 parts of bisphenol A epoxy resin, 68 parts of zinc powder, 7 parts of zinc phosphate, 5 parts of active diluent, 5 parts of self-made modified montmorillonite, 0.5 parts of fumed silica, 4 parts of titanium dioxide, 0.3 parts of carbon black, 0.4 parts of polyamide wax, 0.3 parts of defoamer; 11 parts of modified phenolic amine curing agent, 0.4 parts of accelerator.

[0044] The intermediate paint comprises: 21 parts of bisphenol A epoxy resin, 9 parts of active diluent, 7 parts of self-made modified montmorillonite, 33 parts of micaceous iron oxide, 13 parts of barium sulfate, 6 parts of talc powder, 0.7 parts of fumed silica, 4 parts of titanium dioxide, 0.3 parts of carbon black, 0.4 parts of polyamide wax, 0.4 parts of defoamer, 10 parts of modified phenolic amine curing agent, 0.4 parts of accelerator.

[0045] The topcoat comprises: 68 parts of fluorocarbon resin, 2 parts of fluorosilane-functionalized silicon carbide-coated carbon nanotubes, 23 parts of titanium dioxide, 1 part of UV absorber, 1 part of light stabilizer, 1 part of dispersant, 0.4 parts of leveling agent, 0.5 parts of polyamide wax, 23 parts of solvent, 26 parts of aliphatic isocyanate curing agent.

[0046] The bisphenol A epoxy resin in the primer is bisphenol A E51 epoxy resin; The bisphenol A epoxy resin in the intermediate paint is bisphenol A E51 epoxy resin; The active diluent in the primer and the intermediate paint is a bis-epoxy glycidyl ether-based active diluent; The UV absorber is benzotriazole; The light stabilizer is BASF 944; The solvent is butyl acetate; Among them, the preparation method of the fluorosilane-functionalized silicon carbide-coated carbon nanotubes, the preparation method of the self-made modified montmorillonite, and the preparation method of the heavy-duty anti-corrosion coating applied to the outer wall of the wind power generation tower barrel in Example 4 are all the same as those in Example 1.

[0047] Example 5 A heavy-duty anti-corrosion coating applied to the outer wall of a wind power generation tower barrel, comprising a primer, an intermediate paint, and a topcoat; by weight, The primer comprises: 22 parts of bisphenol A epoxy resin, 70 parts of zinc powder, 8 parts of zinc phosphate, 6 parts of active diluent, 6 parts of self-made modified montmorillonite, 0.5 parts of fumed silica, 5 parts of titanium dioxide, 0.3 parts of carbon black, 0.5 parts of polyamide wax, 0.3 parts of defoamer; 12 parts of modified phenolic amine curing agent, 0.5 parts of accelerator.

[0048] The intermediate paint comprises: 22 parts of bisphenol A epoxy resin, 10 parts of reactive diluent, 8 parts of self-made modified montmorillonite, 35 parts of mica iron oxide, 15 parts of barium sulfate, 7 parts of talcum powder, 0.8 part of fumed silica, 5 parts of titanium dioxide, 0.3 part of carbon black, 0.5 part of polyamide wax, 0.5 part of defoamer, 11 parts of modified phenolic amine curing agent, and 0.5 part of accelerator.

[0049] The topcoat comprises: 72 parts of fluorocarbon resin, 2 parts of fluorosilane-functionalized silicon carbide-coated carbon nanotubes, 25 parts of titanium dioxide, 2 parts of UV absorber, 1 part of light stabilizer, 2 parts of dispersant, 0.5 part of leveling agent, 0.5 part of polyamide wax, 25 parts of solvent, and 28 parts of aliphatic isocyanate curing agent.

[0050] The bisphenol A epoxy resin in the primer is bisphenol A E44 epoxy resin; The bisphenol A epoxy resin in the intermediate paint is bisphenol A E44 epoxy resin; The reactive diluent in the primer is a bis-epoxy glycidyl ether-based reactive diluent; The reactive diluent in the intermediate paint is a mono-epoxy glycidyl ether-based reactive diluent; The UV absorber is benzophenone; The light stabilizer is BASF 944; The solvent is xylene; Among them, the preparation method of the fluorosilane-functionalized silicon carbide-coated carbon nanotubes, the preparation method of the self-made modified montmorillonite, and the preparation method of the heavy-duty anticorrosive paint applied to the outer wall of the wind power generation tower barrel in Example 5 are all the same as those in Example 1.

[0051] Comparative Example 1 A heavy-duty anticorrosive paint applied to the outer wall of a wind power generation tower barrel, comprising a primer, an intermediate paint, and a topcoat; by weight, the primer comprises: 21 parts of bisphenol A epoxy resin, 68 parts of zinc powder, 7 parts of zinc phosphate, 5 parts of reactive diluent, 5 parts of self-made modified montmorillonite, 0.5 part of fumed silica, 4 parts of titanium dioxide, 0.3 part of carbon black, 0.4 part of polyamide wax, 0.3 part of defoamer; 11 parts of modified phenolic amine curing agent, and 0.4 part of accelerator.

[0052] The intermediate paint comprises: 21 parts of bisphenol A epoxy resin, 9 parts of reactive diluent, 7 parts of montmorillonite, 33 parts of mica iron oxide, 13 parts of barium sulfate, 6 parts of talcum powder, 0.7 part of fumed silica, 4 parts of titanium dioxide, 0.3 part of carbon black, 0.4 part of polyamide wax, 0.4 part of defoamer, 10 parts of modified phenolic amine curing agent, and 0.4 part of accelerator.

[0053] The topcoat comprises: 68 parts of fluorocarbon resin, 2 parts of fluorosilane-functionalized silicon carbide-coated carbon nanotubes, 23 parts of titanium dioxide, 1 part of UV absorber, 1 part of light stabilizer, 1 part of dispersant, 0.4 part of leveling agent, 0.5 part of polyamide wax, 23 parts of solvent, and 26 parts of aliphatic isocyanate curing agent.

[0054] Comparative Example 1 is based on Example 4, with the difference that the self-made modified montmorillonite in the intermediate coat is replaced with commercially available montmorillonite, and the addition of fluorosilane-functionalized silicon carbide-coated carbon nanotubes in the topcoat is omitted.

[0055] Except for the above component differences, the preparation method of the heavy-duty anticorrosive coating applied to the outer wall of the wind power generation tower barrel in Comparative Example 1 is the same as that in Example 4. Comparative Example 2 A heavy-duty anticorrosive coating applied to the outer wall of the wind power generation tower barrel, comprising a primer, an intermediate coat, and a topcoat; by weight, The primer comprises: 21 parts of bisphenol A epoxy resin, 68 parts of zinc powder, 7 parts of zinc phosphate, 5 parts of reactive diluent, 5 parts of self-made modified montmorillonite, 0.5 part of fumed silica, 4 parts of titanium dioxide, 0.3 part of carbon black, 0.4 part of polyamide wax, 0.3 part of defoamer; 11 parts of modified phenolic amine curing agent, 0.4 part of accelerator.

[0056] The intermediate coat comprises: 21 parts of bisphenol A epoxy resin, 9 parts of reactive diluent, 33 parts of mica iron oxide, 13 parts of barium sulfate, 6 parts of talc powder, 0.7 part of fumed silica, 4 parts of titanium dioxide, 0.3 part of carbon black, 0.4 part of polyamide wax, 0.4 part of defoamer, 10 parts of modified phenolic amine curing agent, 0.4 part of accelerator.

[0057] The topcoat comprises: 68 parts of fluorocarbon resin, 2 parts of fluorosilane-functionalized silicon carbide-coated carbon nanotubes, 23 parts of titanium dioxide, 1 part of UV absorber, 1 part of light stabilizer, 1 part of dispersant, 0.4 part of leveling agent, 0.5 part of polyamide wax, 23 parts of solvent, and 26 parts of aliphatic isocyanate curing agent.

[0058] Comparative Example 2 is based on Example 4, with the difference that the addition of self-made modified montmorillonite in the intermediate coat is omitted.

[0059] Except for the above component differences, the preparation method of the fluorosilane-functionalized silicon carbide-coated carbon nanotubes and the preparation method of the heavy-duty anticorrosive coating applied to the outer wall of the wind power generation tower barrel in Comparative Example 2 are the same as those in Example 4.

[0060] Comparative Example 3 A heavy-duty anti-corrosion coating applied to the outer wall of a wind power generation tower barrel, including a primer, an intermediate paint, and a topcoat; by weight, the primer includes: 21 parts of bisphenol A epoxy resin, 68 parts of zinc powder, 7 parts of zinc phosphate, 5 parts of active diluent, 5 parts of self-made modified montmorillonite, 0.5 part of fumed silica, 4 parts of titanium dioxide, 0.3 part of carbon black, 0.4 part of polyamide wax, 0.3 part of defoamer; 11 parts of modified phenolic amine curing agent, 0.4 part of accelerator.

[0061] The intermediate paint includes: 21 parts of bisphenol A epoxy resin, 9 parts of active diluent, 7 parts of self-made modified montmorillonite, 33 parts of mica iron oxide, 13 parts of barium sulfate, 6 parts of talc powder, 0.7 part of fumed silica, 4 parts of titanium dioxide, 0.3 part of carbon black, 0.4 part of polyamide wax, 0.4 part of defoamer, 10 parts of modified phenolic amine curing agent, 0.4 part of accelerator.

[0062] The topcoat includes: 68 parts of fluorocarbon resin, 23 parts of titanium dioxide, 1 part of UV absorber, 1 part of light stabilizer, 1 part of dispersant, 0.4 part of leveling agent, 0.5 part of polyamide wax, 23 parts of solvent, 26 parts of aliphatic isocyanate curing agent.

[0063] Comparative Example 3 is based on Example 4, the difference is that the addition of fluorosilane-functionalized silicon carbide-coated carbon nanotubes in the topcoat is omitted.

[0064] Except for the above component differences, the preparation method of the self-made modified montmorillonite in Comparative Example 3 and the preparation method of the heavy-duty anti-corrosion coating applied to the outer wall of the wind power generation tower barrel are the same as those in Example 4.

[0065] Comparative Example 4 A heavy-duty anti-corrosion coating applied to the outer wall of a wind power generation tower barrel, including a primer, an intermediate paint, and a topcoat; by weight, The primer includes: 21 parts of bisphenol A epoxy resin, 68 parts of zinc powder, 7 parts of zinc phosphate, 5 parts of active diluent, 5 parts of self-made modified montmorillonite, 0.5 part of fumed silica, 4 parts of titanium dioxide, 0.3 part of carbon black, 0.4 part of polyamide wax, 0.3 part of defoamer; 11 parts of modified phenolic amine curing agent, 0.4 part of accelerator.

[0066] The intermediate paint includes: 21 parts of bisphenol A epoxy resin, 9 parts of active diluent, 7 parts of montmorillonite, 33 parts of mica iron oxide, 13 parts of barium sulfate, 6 parts of talc powder, 0.7 part of fumed silica, 4 parts of titanium dioxide, 0.3 part of carbon black, 0.4 part of polyamide wax, 0.4 part of defoamer, 10 parts of modified phenolic amine curing agent, 0.4 part of accelerator.

[0067] The topcoat comprises: 68 parts of fluorocarbon resin, 2 parts of fluorosilane-functionalized silicon carbide-coated carbon nanotubes, 23 parts of titanium dioxide, 1 part of UV absorber, 1 part of light stabilizer, 1 part of dispersant, 0.4 part of leveling agent, 0.5 part of polyamide wax, 23 parts of solvent, and 26 parts of aliphatic isocyanate curing agent.

[0068] Comparative Example 4 is based on Example 4, with the difference that the self-made modified montmorillonite in the intermediate coat is replaced with commercially available montmorillonite directly, and no modification operation is performed on the montmorillonite.

[0069] Except for the above component differences, the preparation method of the fluorosilane-functionalized silicon carbide-coated carbon nanotubes in Comparative Example 4 and the preparation method of the heavy-duty anticorrosive coating applied to the outer wall of the wind power generation tower are the same as those in Example 4.

[0070] Comparative Example 5 A heavy-duty anticorrosive coating applied to the outer wall of a wind power generation tower, comprising a primer, an intermediate coat, and a topcoat; by weight, The primer comprises: 21 parts of bisphenol A epoxy resin, 68 parts of zinc powder, 7 parts of zinc phosphate, 5 parts of active diluent, 5 parts of self-made modified montmorillonite, 0.5 part of fumed silica, 4 parts of titanium dioxide, 0.3 part of carbon black, 0.4 part of polyamide wax, 0.3 part of defoamer; 11 parts of modified phenolic amine curing agent, 0.4 part of accelerator.

[0071] The intermediate coat comprises: 21 parts of bisphenol A epoxy resin, 9 parts of active diluent, 7 parts of self-made modified montmorillonite, 33 parts of micaceous iron oxide, 13 parts of barium sulfate, 6 parts of talc powder, 0.7 part of fumed silica, 4 parts of titanium dioxide, 0.3 part of carbon black, 0.4 part of polyamide wax, 0.4 part of defoamer, 10 parts of modified phenolic amine curing agent, 0.4 part of accelerator.

[0072] The topcoat comprises: 68 parts of fluorocarbon resin, 2 parts of carbon nanotubes, 23 parts of titanium dioxide, 1 part of UV absorber, 1 part of light stabilizer, 1 part of dispersant, 0.4 part of leveling agent, 0.5 part of polyamide wax, 23 parts of solvent, and 26 parts of aliphatic isocyanate curing agent.

[0073] Comparative Example 5 is based on Example 4, with the difference that the fluorosilane-functionalized silicon carbide-coated carbon nanotubes in the topcoat are replaced with carbon nanotubes, and no modification operation is performed on the carbon nanotubes.

[0074] Except for the above component differences, the preparation method of the self-made modified montmorillonite in Comparative Example 5 and the preparation method of the heavy-duty anticorrosive coating applied to the outer wall of the wind power generation tower are the same as those in Example 4.

[0075] Test Example Acid and alkali resistance performance test: The test was carried out according to the relevant test methods in the reference standard GB / 9274 "Determination of Resistance of Paints and Varnishes to Liquid Media"; Artificial aging resistance performance test: Referring to the relevant test methods in GB / T 1865 "Artificial Weathering and Artificial Radiation Exposure of Paints and Varnishes", the 1200h artificial aging resistance performance test was carried out; Damp heat resistance performance test: Referring to the damp heat test standard of GJB150, after the heavy-duty anti-corrosion coating was applied on the steel plate and completely dried, the test was carried out according to the test methods therein; Self-cleaning performance test: A simulated dirt carbon black suspension was coated on the coating. After a period of time, a small ultrasonic device was used to clean the coating surface; then the amount of dirt remaining on the coating surface after cleaning was measured, and the weight unit was (mg); The performance test results are shown in Table 1; Table 1

[0076] Data analysis of the test results in Table 1: In Examples 1-5 of this application, excellent performance was shown in the acid and alkali resistance performance test, artificial aging resistance performance test, and damp heat resistance performance test.

[0077] Compared with Example 4, the difference in Comparative Example 4 is that in Comparative Example 4, the self-made modified montmorillonite in the intermediate paint was replaced with commercially available montmorillonite directly. Although the substrate was not exposed, there were huge differences in various performances, especially the damp heat resistance performance, compared with Example 4. The possible reason is that: the self-made modified montmorillonite used in Example 4 undergoes a cation exchange reaction, so that dimethyldistearylammonium chloride replaces the cations in the montmorillonite layer and enters the montmorillonite layer, increasing the montmorillonite layer spacing; and it can interact with the carboxylic acid groups present in the castor oil acid introduced later through hydrogen bonds. The entry of castor oil acid molecules will further expand the montmorillonite layer spacing, making it more uniform and fine in the intermediate paint, and greatly extending the gas diffusion path; and the introduced castor oil acid contains double bonds, which can capture the oxygen that may penetrate into the intermediate paint, thus providing a more durable barrier performance improvement for the heavy-duty anti-corrosion coating; thus endowing Example 4 with excellent damp heat resistance performance.

[0078] The carbon nanotubes in Comparative Example 5 were not modified at all. Compared with Example 4, there were huge performance differences in terms of artificial aging resistance and residual dirt amount. Moreover, the unmodified carbon nanotubes added might also have the problem of uneven dispersion. The fluorosilane-functionalized silicon carbide-coated carbon nanotubes used in the examples already had relatively high modulus and tensile strength ratio, which could effectively improve the toughness and crack resistance of the topcoat; using silicon carbide-coated carbon nanotubes could change the surface energy of the carbon nanotubes to a certain extent, facilitating their dispersion in the topcoat; and silicon carbide had certain absorption and scattering capabilities in the ultraviolet band, which could enhance the anti-aging performance of the topcoat material; subsequently, long-chain perfluorooctyltriethoxysilane was also used. It contained ethoxy groups, and the silanol groups generated after hydrolysis could undergo a condensation reaction with the Si-OH groups on the surface of silicon carbide to form stable siloxane bonds, thereby firmly grafting the long-chain perfluorooctyl onto the surface of silicon carbide through covalent bonds; and the perfluorooctyl contained a large number of C-F bonds, making it difficult for pollutants to adhere, giving the topcoat a certain self-cleaning effect; that is, the residual dirt amount was less.

[0079] The performance of Comparative Example 1 was the worst. Among Comparative Examples 1-5, Comparative Example 2 had less residual dirt amount and relatively better aging resistance, but relatively worse acid and alkali resistance and damp heat resistance; although Comparative Example 3 had relatively better acid and alkali resistance and damp heat resistance, its aging resistance and residual dirt amount were more; and there was still a large performance gap with Examples 1-5. This reflects indirectly that only by combining fluorosilane-functionalized silicon carbide-coated carbon nanotubes and self-made modified montmorillonite can the best performance be achieved. Among them, the possible reason is that the active sites of the microinterface formed by the self-made modified montmorillonite and the resin can interact with the polar groups in the topcoat, enhancing the interlayer adhesion between the topcoat and the intermediate coat; promoting the interlayer combination through the modification of the filler, and through the superposition of multi-level and multi-mechanism barriers and the synergistic effect, more efficient and long-lasting protection is achieved, improving the anti-damp heat aging and anti-corrosion performance of the film of the heavy-duty anti-corrosion coating and realizing longer-term protection for the power generation tower barrel.

[0080] The specific embodiments described above have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel, comprising a primer, an intermediate paint, and a topcoat, characterized in that, By weight parts, the primer has the following composition, including: 18 - 22 parts of bisphenol A epoxy resin, 60 - 70 parts of zinc powder, 4 - 8 parts of zinc phosphate, 3 - 6 parts of reactive diluent, 3 - 6 parts of self-made modified montmorillonite, 0.3 - 0.5 parts of fumed silica, 2 - 5 parts of titanium dioxide, 0.1 - 0.3 parts of carbon black, 0.2 - 0.5 parts of polyamide wax, 0.1 - 0.3 parts of defoamer; 8 - 12 parts of modified phenolic amine curing agent, 0.1 - 0.5 parts of accelerator; the intermediate paint has the following composition, including: 16 - 22 parts of bisphenol A epoxy resin, 5 - 10 parts of reactive diluent, 5 - 8 parts of self-made modified montmorillonite, 25 - 35 parts of micaceous iron oxide, 8 - 15 parts of barium sulfate, 3 - 7 parts of talc powder, 0.5 - 0.8 parts of fumed silica, 2 - 5 parts of titanium dioxide, 0.1 - 0.3 parts of carbon black, 0.2 - 0.5 parts of polyamide wax, 0.2 - 0.5 parts of defoamer, 7 - 11 parts of modified phenolic amine curing agent, 0.1 - 0.5 parts of accelerator; the topcoat has the following composition, including: 56 - 72 parts of fluorocarbon resin, 0.6 - 2.0 parts of fluorosilane-functionalized silicon carbide-coated carbon nanotubes, 18 - 25 parts of titanium dioxide, 0.8 - 1.6 parts of UV absorber, 0.7 - 1.4 parts of light stabilizer, 0.8 - 1.5 parts of dispersant, 0.2 - 0.5 parts of leveling agent, 0.3 - 0.5 parts of polyamide wax, 15 - 25 parts of solvent, 18 - 28 parts of aliphatic isocyanate curing agent.

2. The heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel according to claim 1, wherein The reactive diluent in the primer and intermediate paint is one of mono-epoxy glycidyl ether reactive diluents or bis-epoxy glycidyl ether reactive diluents.

3. The heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel according to claim 1, wherein, The defoamer in the primer and intermediate paint is BYK-066 N; the accelerator in the primer and intermediate paint is DMP-30.

4. The heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel according to claim 1, wherein, The bisphenol A epoxy resin in the primer and intermediate paint is any one of bisphenol A E44 epoxy resin and bisphenol A E51 epoxy resin; the fluorocarbon resin in the topcoat is FEVE-type fluorocarbon resin.

5. The heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel according to claim 1, wherein The UV absorber in the topcoat is one of benzophenone and benzotriazole; the light stabilizer in the topcoat is one of BASF 944 and BASF 622.

6. The heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel according to claim 1, wherein, The solvent in the topcoat is one of butyl acetate and xylene.

7. The heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel according to claim 1, characterized in that, The preparation method of the self-made modified montmorillonite in the intermediate paint is as follows: Take montmorillonite, disperse it in distilled water, then add sodium carbonate solution, heat up to 95 degrees Celsius, and stir magnetically for 20 min; Subsequently, add dimethyldistearylammonium chloride to the mixed solution, continue stirring, and filter to obtain the intermediate product after the reaction is completed; Then take the intermediate product and ricinoleic acid, place them in a reaction vessel, heat up to 60 degrees Celsius, stir and react for 2 h, take out the mixture, and wash it repeatedly with methanol; Place the reaction product in a vacuum drying oven and dry it thoroughly to constant weight, and grind it into fine powder, and sieve it through a 200-mesh sieve to prepare the self-made modified montmorillonite.

8. The heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel according to claim 1, characterized in that, The preparation method of the fluoroalkylsilane-functionalized silicon carbide-coated carbon nanotubes in the topcoat is as follows: Weigh the silicon carbide-coated carbon nanotubes and add them to absolute ethanol, and ultrasonically disperse to obtain a suspension; transfer it to a three-necked flask, slowly add glacial acetic acid to adjust the pH of the reaction system to 4.5; continue magnetic stirring and slowly add perfluorooctyltriethoxysilane. After stirring evenly, slowly add deionized water to control the hydrolysis rate; then heat the reaction system to 70 °C and keep magnetic stirring and continue the reaction for 2 h; after the reaction is completed, naturally cool to room temperature, filter and collect the solid product; and repeatedly wash the product with sufficient absolute ethanol to completely remove the unreacted substances; finally, place it in a vacuum drying oven and dry to constant weight, thus preparing the fluoroalkylsilane-functionalized silicon carbide-coated carbon nanotubes.

9. The heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel according to claim 8, wherein, The preparation method of the silicon carbide-coated carbon nanotubes: Place polycarbosilane in n-hexane and ultrasonically disperse; then add carbon nanotubes to it; Heat the reaction vessel to 60 °C and continue ultrasonic treatment for 30 min, then place the mixture in a fume hood and let the solvent naturally volatilize at room temperature to obtain dry polycarbosilane-coated carbon nanotubes; transfer them to a quartz crucible, put them into a tube furnace under an inert atmosphere, heat to 240 °C and keep it for 90 min; then continue to heat to 1150 °C and keep it for 60 min; after the reaction is completed, continue to maintain an inert environment and naturally cool to room temperature, thus preparing the silicon carbide-coated carbon nanotubes.

10. The heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel according to any one of claims 1-9, characterized in that, The preparation method of the heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower barrel includes the following steps. The preparation method of the primer is: Add bisphenol A epoxy resin and active diluent to a stirring kettle, stir and mix evenly at a low speed of 300-400 r / min, then add zinc phosphate, zinc powder, self-made modified montmorillonite, defoamer, fumed silica, titanium dioxide, carbon black, polyamide wax, and stir and disperse for 20 min at 600-800 r / min; finally, add modified phenolic amine curing agent and accelerator, stir for 3 min, and after mixing evenly, the primer is prepared; The preparation method of the intermediate coat is: Add bisphenol A epoxy resin and active diluent to a stirring kettle, stir and mix evenly at a low speed of 300-400 r / min, then add mica iron oxide, barium sulfate, talc powder, fumed silica, titanium dioxide, carbon black, polyamide wax, defoamer, self-made modified montmorillonite, and stir and disperse for 30 min at 500-600 r / min; finally, add modified phenolic amine curing agent and accelerator, stir for 3 min, and after mixing evenly, the intermediate coat is prepared; The preparation method of the topcoat is: Add solvent and fluorocarbon resin to a stirring kettle, stir at a low speed of 300-400 r / min until the resin is completely dissolved; then add titanium dioxide, UV absorber, light stabilizer, dispersant, leveling agent, polyamide wax, fluoroalkylsilane-functionalized silicon carbide-coated carbon nanotubes, and stir and disperse for 40 min at 600-800 r / min; finally, add aliphatic isocyanate curing agent, stir for 3 min, and after mixing evenly, the topcoat is prepared.

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