Heavy-duty anti-corrosion coating for outer wall of wind power tower and preparation method thereof

Abstract

The invention discloses a heavy-duty anti-corrosion coating applied to the outer wall of a wind power generation tower and a preparation method thereof, belonging to the technical field of heavy-duty anti-corrosion coatings. The coating comprises, by weight, a primer, an intermediate paint, and a topcoat. The primer comprises, 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 reactive diluent, 3-6 parts of homemade 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, and 0.1-0.3 parts of a defoaming agent; 8-12 parts of a modified phenalkamine curing agent, and 0.1-0.5 parts of an accelerator. The heavy-duty anti-corrosion coating of the present application promotes interlayer bonding by modifying the filler, and achieves more efficient and lasting protection through the synergistic effect of multi-level and multi-mechanism barrier superposition, thereby improving the paint film's resistance to moisture and heat aging and corrosion resistance of the heavy-duty anti-corrosion coating and achieving longer-term protection for the outer wall of the power tower.

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 tower and a preparation method thereof. Background Art

[0002] With growing global energy demand and increasingly prominent environmental issues associated with fossil fuels, the development and utilization of clean, renewable energy has become a global consensus and a key development direction. Wind power utilizes natural wind energy to drive generators, converting it into electricity. The power generation process does not produce greenhouse gases, air pollutants, or wastewater, and its environmental impact is far less than that of traditional thermal power generation. It is widely recognized as a clean, sustainable energy solution.

[0003] As one of the world's largest energy consumers, China is actively promoting the transformation and upgrading of its energy structure and vigorously developing renewable energy, including wind power. Wind energy resources have enormous potential for development in areas with favorable natural conditions, particularly in Yunnan, located in southwest China. Yunnan boasts a unique geographical location and climatic conditions, resulting in a distinct three-dimensional climate. This diverse climate and topography fosters abundant wind energy resources, providing a unique natural advantage for the development of wind power.

[0004] Existing anti-corrosion coatings for wind turbine towers include Chinese invention patent application number CN202310336118.0, which discloses a salt-spray-resistant acrylic topcoat for wind turbine towers and its preparation method. The topcoat comprises the following raw materials by weight: 50-65 parts of fluorosilicone-modified acrylic resin, 8-13 parts of titanium dioxide, 5-10 parts of graphene-loaded copper oxide, 2-5 parts of fluorinated polyether-modified polysiloxane, 2-3 parts of leveling agent, 1-2 parts of toughening agent, 8-11 parts of curing agent, 8-11 parts of diluent, and 0-5 parts of other pigments. While this prior art also applies to wind turbine towers, its core focus is on offshore environments, primarily focusing on the coating's salt-spray resistance.

[0005] Unlike offshore environments, wind turbine towers used in Yunnan are usually built on hillsides with strong winds, and their altitudes are usually high. Yunnan's high-altitude areas often have large temperature differences between day and night. The thermal expansion and contraction of the outer wall of the steel structure tower will bring periodic mechanical stress to the coating, which can easily cause the coating to crack or peel. At the same time, under the special climatic conditions of Yunnan, the humid and hot cycle environment will make the coating prone to hydrolysis in this environment, increasing the permeability of the coating and accelerating the corrosion process. Even more challenging is that the mountainous areas of Yunnan face the combined effects of extremely strong ultraviolet radiation, significant temperature differences between day and night, and high humidity. In addition, strong winds in the mountains may carry dust. These complex environments jointly place higher demands on the protection of the outer walls of wind turbine towers in Yunnan. However, in the current existing technology, there is no heavy-duty anti-corrosion coating for the outer wall of wind turbine towers that is specifically optimized for the characteristics of the Yunnan region.

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

[0007] To address the defects in the above technical solutions, the present invention aims to provide a heavy-duty anti-corrosion coating for use on the outer wall of a wind turbine tower and a preparation method thereof. The present invention can achieve this through the following technical solution: A heavy-duty anti-corrosion coating for use on the outer wall of a wind turbine tower, comprising a primer, an intermediate paint, and a topcoat; the primer comprises, 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 homemade 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, and 0.1-0.3 parts of a defoaming agent; 8-12 parts of a modified phenolic amine curing agent, and 0.1-0.5 parts of an accelerator. The intermediate paint is composed of: 16-22 parts of bisphenol A epoxy resin, 5-10 parts of active diluent, 5-8 parts of homemade modified montmorillonite, 25-35 parts of micaceous iron oxide, 8-15 parts of barium sulfate, 3-7 parts of talc, 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 defoaming agent, 7-11 parts of modified phenolic amine curing agent, and 0.1-0.5 parts of accelerator. The topcoat is composed of 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, and 18-28 parts of aliphatic isocyanate curing agent.

[0008] The active diluent in the primer and the intermediate paint is one of a monoepoxy glycidyl ether active diluent or a diepoxy glycidyl ether active diluent;

[0009] The bisphenol A epoxy resin in the primer and the intermediate paint is any one of bisphenol A E44 epoxy resin and bisphenol A E51 epoxy resin;

[0010] The defoamer in the primer and mid-coat is BYK-066 N;

[0011] The accelerator in the primer and mid-coat is DMP-30;

[0012] The titanium dioxide is weather-resistant rutile titanium dioxide;

[0013] The fluorocarbon resin is a FEVE type fluorocarbon resin;

[0014] The UV absorber is one of benzophenone and benzotriazole;

[0015] The light stabilizer is one of BASF 944 and BASF 622;

[0016] The solvent is one of butyl acetate and xylene;

[0017] The dispersant is EFKAPX 4330;

[0018] The leveling agent is Capstone FS-50.

[0019] The preparation method of the fluorosilane-functionalized silicon carbide-coated carbon nanotubes is as follows: weighing silicon carbide-coated carbon nanotubes and adding them to anhydrous ethanol, ultrasonically dispersing them to obtain a suspension; transferring the carbon nanotubes to a three-necked flask, slowly dropping glacial acetic acid to adjust the pH of the reaction system to 4.5; continuing magnetic stirring and slowly dropping perfluorooctyltriethoxysilane, stirring evenly, and then slowly dropping deionized water to control the hydrolysis rate; then heating the reaction system to 70 degrees Celsius and maintaining magnetic stirring to continue the reaction for 2 hours; after the reaction is completed, naturally cooling to room temperature, filtering and collecting a solid product; and repeatedly washing the product with sufficient anhydrous ethanol to completely remove unreacted substances; finally, placing the product in a vacuum drying oven and drying it to constant weight, thereby preparing the fluorosilane-functionalized silicon carbide-coated carbon nanotubes.

[0020] The CAS number of the perfluorooctyltriethoxysilane is: 51851-37-7.

[0021] The preparation method of the silicon carbide-coated carbon nanotubes comprises the following steps: placing polycarbosilane in n-hexane and ultrasonically dispersing the polycarbosilane; then adding carbon nanotubes thereto; heating the reaction vessel to 60 degrees Celsius and continuing ultrasonic treatment for 30 minutes; then placing the mixture in a fume hood and allowing the solvent to evaporate naturally at room temperature to obtain dry polycarbosilane-coated carbon nanotubes; transferring the mixture to a quartz crucible, placing the mixture in a tube furnace under an inert atmosphere, heating the mixture to 240 degrees Celsius and keeping the temperature for 90 minutes; then continuing to heat the mixture to 1150 degrees Celsius and keeping the temperature for 60 minutes; and after the reaction is completed, continuing to maintain an inert environment and naturally cooling the mixture to room temperature to obtain the silicon carbide-coated carbon nanotubes.

[0022] The heating rate of the tube furnace is 10°C / min.

[0023] The method for preparing the homemade modified montmorillonite comprises the following steps: dispersing montmorillonite in distilled water, adding a sodium carbonate solution, heating the mixture to 95 degrees Celsius, and magnetically stirring the mixture for 20 minutes; adding distearyldimethylammonium chloride to the mixed solution, continuing stirring, and filtering the mixture after the reaction is complete to obtain an intermediate product; placing the intermediate product and ricinoleic acid in a reaction vessel, heating the mixture to 60 degrees Celsius, stirring the mixture for reaction for 2 hours, taking out the mixture, and repeatedly washing the mixture with methanol; placing the reaction product in a vacuum drying oven to fully dry it to a constant weight, grinding it into a fine powder, and sieving it through a 200-mesh sieve to prepare the homemade modified montmorillonite.

[0024] A heavy-duty anti-corrosion coating for the outer wall of a wind power tower comprises a primer, an intermediate paint, and a topcoat. The primer is prepared by adding bisphenol A epoxy resin and a reactive diluent into a stirring kettle, stirring and mixing them uniformly at a low speed of 300-400 rpm, then adding zinc phosphate, zinc powder, homemade modified montmorillonite, a defoamer, fumed silica, titanium dioxide, carbon black, and polyamide wax, stirring and dispersing them at a speed of 600-800 rpm for 20 minutes, and finally adding a modified phenolic amine curing agent and an accelerator, stirring and mixing for 3 minutes, and then uniformly mixing to prepare the primer.

[0025] The preparation method of the intermediate paint comprises the following steps: adding bisphenol A epoxy resin and a reactive diluent into a stirring kettle, stirring and mixing at a low speed of 300-400 rpm until uniform; then adding micaceous iron oxide, barium sulfate, talc, fumed silica, titanium dioxide, carbon black, polyamide wax, a defoamer, and homemade modified montmorillonite, stirring and dispersing at a speed of 500-600 rpm for 30 minutes; and finally adding a modified phenolic amine curing agent and an accelerator, stirring and mixing for 3 minutes until uniform, thereby preparing the intermediate paint.

[0026] The preparation method of the topcoat comprises the following steps: 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 a speed of 600-800 rpm for 40 minutes; and finally adding an aliphatic isocyanate curing agent, stirring for 3 minutes, and mixing evenly to prepare the topcoat.

[0027] The present invention has the beneficial effects:

[0028] 1. The homemade modified montmorillonite in the heavy-duty anti-corrosion coating of the present application undergoes a cation exchange reaction, allowing distearyldimethylammonium chloride to replace the cations between the montmorillonite layers and enter the montmorillonite layers, thereby increasing the interlayer spacing of the montmorillonite. Furthermore, the modified montmorillonite can interact with the carboxylic acid groups in the subsequently introduced ricinoleic acid through hydrogen bonds. The entry of ricinoleic acid molecules further expands the interlayer spacing of the montmorillonite, allowing it to be more evenly and finely dispersed in the intermediate paint and greatly extending the gas diffusion path. Furthermore, the introduced ricinoleic acid contains double bonds that can capture oxygen that may penetrate into the intermediate paint, thereby providing the heavy-duty anti-corrosion coating with a more durable barrier performance improvement. Furthermore, the homemade modified montmorillonite is also added to the primer, which can also improve the barrier performance of the primer to a certain extent.

[0029] 2. The fluorosilane-functionalized silicon carbide-coated carbon nanotubes of the present application have a high modulus and tensile strength ratio, which can effectively improve the toughness and crack resistance of the topcoat. The use of silicon carbide to coat carbon nanotubes can change the surface energy of the carbon nanotubes to a certain extent, which is conducive to their dispersion in the topcoat. In addition, silicon carbide has a 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 also used. It contains ethoxy groups. The silanol groups generated after hydrolysis can undergo 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 groups to the surface of silicon carbide through covalent bonds. The perfluorooctyl groups contain a large number of CF bonds, which makes it difficult for pollutants to adhere, and the topcoat has a certain self-cleaning effect.

[0030] 3. The heavy-duty anti-corrosion coating of the present application introduces fluorosilane-functionalized silicon carbide-coated carbon nanotubes into the topcoat and self-made modified montmorillonite into the middle paint; the microscopic interface formed by the self-made modified montmorillonite and the resin has active sites that can interact with the polar groups in the topcoat to enhance the interlayer adhesion between the topcoat and the middle paint; the interlayer bonding is promoted by modifying the filler, and the multi-level and multi-mechanism barrier superposition and synergistic effect achieve more efficient and longer-lasting protection, thereby improving the resistance of the heavy-duty anti-corrosion coating film to moisture-heat aging and corrosion resistance, and achieving longer-term protection for the power tower. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with Examples. The illustrative embodiments of the present invention and their description 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 smaller range between the intermediate value within any stated value or stated range and any other stated value or intermediate value within the range is also included in the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded within the scope.

[0032] Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein may also be used in the practice 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 associated with the documents. In the event of any conflict with any incorporated document, the contents of this specification shall prevail.

[0033] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from the description of the invention. The description and examples are intended to be exemplary only.

[0034] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0035] The "parts" indicated in the following examples are all parts by weight.

[0036] Example 1

[0037] A heavy-duty anti-corrosion coating for the outer wall of a wind power tower, comprising a primer, an intermediate paint, and a topcoat; the primer comprises, by weight: 18 parts of bisphenol A epoxy resin, 60 parts of zinc powder, 4 parts of zinc phosphate, 3 parts of an active diluent, 3 parts of homemade modified montmorillonite, 0.3 parts of fumed silica, 2 parts of titanium dioxide, 0.1 parts of carbon black, 0.2 parts of polyamide wax, and 0.1 parts of a defoaming agent; 8 parts of a modified phenolic amine curing agent, and 0.1 parts of an accelerator.

[0038] The intermediate paint includes: 16 parts of bisphenol A epoxy resin, 5 parts of active diluent, 5 parts of homemade modified montmorillonite, 25 parts of mica iron oxide, 8 parts of barium sulfate, 3 parts of talc, 0.5 parts of fumed silica, 2 parts of titanium dioxide, 0.1 parts of carbon black, 0.2 parts of polyamide wax, 0.2 parts of defoaming agent, 7 parts of modified phenolic amine curing agent, and 0.1 parts of accelerator.

[0039] The topcoat comprises: 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.

[0040] The active diluent in the primer and the intermediate paint is one of a monoepoxy glycidyl ether active diluent and a diepoxy glycidyl ether active diluent.

[0041] The bisphenol A epoxy resin in the primer is bisphenol A E44 epoxy resin;

[0042] The bisphenol A epoxy resin in the intermediate paint is bisphenol A E44 epoxy resin;

[0043] The defoamer in the primer and mid-coat is BYK-066 N;

[0044] The accelerator in the primer and mid-coat is DMP-30;

[0045] The titanium dioxide is weather-resistant rutile titanium dioxide, purchased from Shijiazhuang Yuandu Chemical Technology Co., Ltd.

[0046] The fluorocarbon resin is FEVE type fluorocarbon resin, purchased from Shanghai Tefubang New Material Technology Co., Ltd.;

[0047] The UV absorber is benzotriazole;

[0048] The light stabilizer is BASF 622;

[0049] The solvent is butyl acetate;

[0050] The dispersant is EFKAPX 4330;

[0051] The leveling agent is Capstone FS-50.

[0052] Preparation method of fluorosilane functionalized silicon carbide-coated carbon nanotubes: weigh 1g of silicon carbide-coated carbon nanotubes and add it to 250ml of anhydrous ethanol, ultrasonically disperse for 30 minutes 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 0.4g of perfluorooctyltriethoxysilane, stir evenly, and then slowly add a total of 2ml of deionized water to control the hydrolysis rate; then heat the reaction system to 70 degrees Celsius, and maintain magnetic stirring to continue the reaction for 2h; after the reaction is completed, naturally cool to room temperature, filter and collect the solid product; and repeatedly wash the product with sufficient anhydrous ethanol to completely remove unreacted substances; finally, place it in a vacuum drying oven and dry it to constant weight to prepare fluorosilane functionalized silicon carbide-coated carbon nanotubes.

[0053] The CAS number of the perfluorooctyltriethoxysilane is: 51851-37-7.

[0054] Preparation method of silicon carbide-coated carbon nanotubes: weigh 1g of polycarbosilane and place it in 100ml of n-hexane, ultrasonically disperse it for 15 minutes to make it fully dispersed; then weigh 5g of carbon nanotubes and add them to the above mixture, place the reaction container in a water bath and heat it to 60 degrees Celsius, and continue ultrasonic treatment for 30 minutes to allow the polycarbosilane to be fully adsorbed on the surface of the carbon nanotubes; then place the mixture in a fume hood and allow the solvent to evaporate naturally 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 degrees Celsius, and keep it warm for 90 minutes to carry out preliminary cross-linking and curing; then continue to heat it to 1150 degrees Celsius under the protection of an inert atmosphere and keep it warm for 60 minutes to allow the polycarbosilane to be completely cracked and converted into silicon carbide; after the reaction is completed, continue to maintain an inert environment and naturally cool to room temperature to prepare silicon carbide-coated carbon nanotubes.

[0055] Among them, the heating rate of the tube furnace is 10°C / min;

[0056] Preparation method of homemade modified montmorillonite: weigh 8g of montmorillonite, disperse it in 200ml of distilled water, then add 10ml of 15% mass percentage sodium carbonate solution, then heat it to 95 degrees Celsius, magnetically stir it for 20 minutes, then add 10g of distearyldimethylammonium chloride to the mixed solution, and continue stirring for 20 minutes; after the reaction is completed, filter to obtain a solid precipitate as an intermediate product; then weigh 8g of the intermediate product and 16g of ricinoleic acid, place them in a reaction vessel and heat them to 60 degrees Celsius, stir and react for 2 hours, take out the mixture, and repeatedly wash it with methanol to remove unreacted materials; then place the reaction product in a vacuum drying oven and fully dry it to constant weight, grind it into fine powder, and sieve it through a 200-mesh sieve to prepare homemade modified montmorillonite.

[0057] The montmorillonite was purchased from Shijiazhuang Zhengyu New Material Technology Co., Ltd., and its CEC was 96.5 Cmol (+) / kg;

[0058] A heavy-duty anti-corrosion coating for the outer wall of a wind power tower comprises a primer, an intermediate paint, and a topcoat. The primer is prepared by adding bisphenol A epoxy resin and a reactive diluent into a stirring kettle, stirring and mixing them uniformly at a low speed of 300-400 rpm, then adding zinc phosphate, zinc powder, homemade modified montmorillonite, a defoamer, fumed silica, titanium dioxide, carbon black, and polyamide wax, stirring and dispersing them at a speed of 600-800 rpm for 20 minutes, and finally adding a modified phenolic amine curing agent and an accelerator, stirring and mixing for 3 minutes, and then uniformly mixing to prepare the primer.

[0059] The preparation method of the intermediate paint comprises the following steps: adding bisphenol A epoxy resin and a reactive diluent into a stirring kettle, stirring and mixing at a low speed of 300-400 rpm until uniform; then adding micaceous iron oxide, barium sulfate, talc, fumed silica, titanium dioxide, carbon black, polyamide wax, a defoamer, and homemade modified montmorillonite, stirring and dispersing at a speed of 500-600 rpm for 30 minutes; and finally adding a modified phenolic amine curing agent and an accelerator, stirring and mixing for 3 minutes until uniform, thereby preparing the intermediate paint.

[0060] The preparation method of the topcoat comprises the following steps: 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 a speed of 600-800 rpm for 40 minutes; and finally adding an aliphatic isocyanate curing agent, stirring for 3 minutes, and mixing evenly to prepare the topcoat.

[0061] Example 2

[0062] A heavy-duty anti-corrosion coating for 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 an 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.

[0063] The intermediate paint includes: 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 talc, 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.

[0064] The topcoat comprises: 60 parts of fluorocarbon resin, 1.0 part of fluorosilane functionalized silicon carbide coated carbon nanotubes, 20 parts of titanium dioxide, 1 part of UV absorber, 0.9 part of light stabilizer, 1.0 part of dispersant, 0.3 part of leveling agent, 0.4 part of polyamide wax, 18 parts of solvent, and 21 parts of aliphatic isocyanate curing agent.

[0065] The bisphenol A epoxy resin in the primer is bisphenol A E51 epoxy resin;

[0066] The bisphenol A epoxy resin in the intermediate paint is bisphenol A E51 epoxy resin;

[0067] The active diluent in the primer is a monoepoxy glycidyl ether active diluent;

[0068] The active diluent in the intermediate paint is a diepoxy glycidyl ether active diluent;

[0069] The UV absorber is benzophenone;

[0070] The light stabilizer is BASF 944;

[0071] The solvent is butyl acetate;

[0072] Among them, the preparation method of fluorosilane functionalized silicon carbide coated carbon nanotubes, the preparation method of homemade modified montmorillonite, and the preparation method of heavy-duty anti-corrosion coating applied to the outer wall of wind power tower in Example 2 are all consistent with those in Example 1.

[0073] Example 3

[0074] A heavy-duty anti-corrosion coating for the outer wall of a wind power tower, comprising a primer, an intermediate paint, and a topcoat; the primer comprises, by weight: 20 parts of bisphenol A epoxy resin, 65 parts of zinc powder, 6 parts of zinc phosphate, 5 parts of a reactive diluent, 5 parts of homemade 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, and 0.2 parts of a defoaming agent; 10 parts of a modified phenolic amine curing agent, and 0.3 parts of an accelerator.

[0075] The intermediate paint includes: 19 parts of bisphenol A epoxy resin, 8 parts of active diluent, 7 parts of homemade modified montmorillonite, 30 parts of mica iron oxide, 12 parts of barium sulfate, 5 parts of talc, 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 defoaming agent, 9 parts of modified phenolic amine curing agent, and 0.3 parts of accelerator.

[0076] The topcoat comprises: 64 parts of fluorocarbon resin, 1 part of fluorosilane 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 part of leveling agent, 0.4 part of polyamide wax, 20 parts of solvent, and 23 parts of aliphatic isocyanate curing agent.

[0077] The bisphenol A epoxy resin in the primer is bisphenol A E51 epoxy resin;

[0078] The bisphenol A epoxy resin in the intermediate paint is bisphenol A E51 epoxy resin;

[0079] The active diluent in the primer and the intermediate paint is a monoepoxy glycidyl ether active diluent;

[0080] The UV absorber is benzotriazole;

[0081] The light stabilizer is BASF 622;

[0082] The solvent is xylene;

[0083] Among them, the preparation method of fluorosilane functionalized silicon carbide coated carbon nanotubes, the preparation method of homemade modified montmorillonite, and the preparation method of heavy-duty anti-corrosion coating applied to the outer wall of wind power tower in Example 3 are all consistent with those in Example 1.

[0084] Example 4

[0085] A heavy-duty anti-corrosion coating for the outer wall of a wind power tower, comprising a primer, an intermediate paint, and a topcoat; the primer comprises, by weight: 21 parts of bisphenol A epoxy resin, 68 parts of zinc powder, 7 parts of zinc phosphate, 5 parts of an active diluent, 5 parts of homemade 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, and 0.3 parts of a defoaming agent; 11 parts of a modified phenolic amine curing agent, and 0.4 parts of an accelerator.

[0086] The intermediate paint includes: 21 parts of bisphenol A epoxy resin, 9 parts of active diluent, 7 parts of homemade modified montmorillonite, 33 parts of mica iron oxide, 13 parts of barium sulfate, 6 parts of talc, 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 defoaming agent, 10 parts of modified phenolic amine curing agent, and 0.4 parts of accelerator.

[0087] 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.

[0088] The bisphenol A epoxy resin in the primer is bisphenol A E51 epoxy resin;

[0089] The bisphenol A epoxy resin in the intermediate paint is bisphenol A E51 epoxy resin;

[0090] The active diluent in the primer and the intermediate paint is a diepoxy glycidyl ether active diluent;

[0091] The UV absorber is benzotriazole;

[0092] The light stabilizer is BASF 944;

[0093] The solvent is butyl acetate;

[0094] Among them, the preparation method of fluorosilane functionalized silicon carbide coated carbon nanotubes, the preparation method of homemade modified montmorillonite, and the preparation method of heavy-duty anti-corrosion coating applied to the outer wall of wind power tower in Example 4 are all consistent with those in Example 1.

[0095] Example 5

[0096] 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; calculated by weight,

[0097] 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 homemade 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 defoaming agent; 12 parts of modified phenolic amine curing agent, and 0.5 parts of accelerator.

[0098] The intermediate paint includes: 22 parts of bisphenol A epoxy resin, 10 parts of active diluent, 8 parts of homemade modified montmorillonite, 35 parts of mica iron oxide, 15 parts of barium sulfate, 7 parts of talc, 0.8 parts of fumed silica, 5 parts of titanium dioxide, 0.3 parts of carbon black, 0.5 parts of polyamide wax, 0.5 parts of defoaming agent, 11 parts of modified phenolic amine curing agent, and 0.5 parts of accelerator.

[0099] 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 parts of leveling agent, 0.5 parts of polyamide wax, 25 parts of solvent, and 28 parts of aliphatic isocyanate curing agent.

[0100] The bisphenol A epoxy resin in the primer is bisphenol A E44 epoxy resin;

[0101] The bisphenol A epoxy resin in the intermediate paint is bisphenol A E44 epoxy resin;

[0102] The active diluent in the primer is a diepoxy glycidyl ether active diluent;

[0103] The active diluent in the intermediate paint is a monoepoxy glycidyl ether active diluent;

[0104] The UV absorber is benzophenone;

[0105] The light stabilizer is BASF 944;

[0106] The solvent is xylene;

[0107] Among them, the preparation method of fluorosilane functionalized silicon carbide coated carbon nanotubes, the preparation method of homemade modified montmorillonite, and the preparation method of heavy-duty anti-corrosion coating applied to the outer wall of wind power tower in Example 5 are all consistent with those in Example 1.

[0108] Comparative Example 1

[0109] A heavy-duty anti-corrosion coating for use on the outer wall of a wind turbine tower, comprising a primer, an intermediate paint, and a topcoat. The primer comprises, by weight: 21 parts of bisphenol A epoxy resin, 68 parts of zinc powder, 7 parts of zinc phosphate, 5 parts of a reactive diluent, 5 parts of homemade 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, and 0.3 parts of a defoaming agent; 11 parts of a modified phenolic amine curing agent, and 0.4 parts of an accelerator.

[0110] 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, 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 defoaming agent, 10 parts of modified phenolic amine curing agent, and 0.4 parts of accelerator.

[0111] 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.

[0112] Comparative Example 1 is based on Example 4, except that the homemade modified montmorillonite in the intermediate paint is replaced by directly using commercially available montmorillonite, and the addition of fluorosilane-functionalized silicon carbide-coated carbon nanotubes in the topcoat is omitted.

[0113] Except for the above-mentioned differences in components, the preparation method of the heavy-duty anti-corrosion coating applied to the outer wall of the wind power tower in Comparative Example 1 is the same as that in Example 4.

[0114] Comparative Example 2

[0115] 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; calculated by weight,

[0116] 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 homemade 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 defoaming agent; 11 parts of modified phenolic amine curing agent, and 0.4 parts of accelerator.

[0117] The intermediate paint includes: 21 parts of bisphenol A epoxy resin, 9 parts of active diluent, 33 parts of mica iron oxide, 13 parts of barium sulfate, 6 parts of talc, 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 defoaming agent, 10 parts of modified phenolic amine curing agent, and 0.4 parts of accelerator.

[0118] 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.

[0119] Comparative Example 2 is based on Example 4, except that the addition of the homemade modified montmorillonite in the intermediate paint is omitted.

[0120] Except for the above-mentioned component differences, the preparation method of the fluorosilane-functionalized silicon carbide-coated carbon nanotubes and the preparation method of the heavy-duty anti-corrosion coating applied to the outer wall of the wind power tower in Comparative Example 2 are the same as those in Example 4.

[0121] Comparative Example 3

[0122] A heavy-duty anti-corrosion coating for use on the outer wall of a wind turbine tower, comprising a primer, an intermediate paint, and a topcoat. The primer comprises, by weight: 21 parts of bisphenol A epoxy resin, 68 parts of zinc powder, 7 parts of zinc phosphate, 5 parts of a reactive diluent, 5 parts of homemade 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, and 0.3 parts of a defoaming agent; 11 parts of a modified phenolic amine curing agent, and 0.4 parts of an accelerator.

[0123] The intermediate paint includes: 21 parts of bisphenol A epoxy resin, 9 parts of active diluent, 7 parts of homemade modified montmorillonite, 33 parts of mica iron oxide, 13 parts of barium sulfate, 6 parts of talc, 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 defoaming agent, 10 parts of modified phenolic amine curing agent, and 0.4 parts of accelerator.

[0124] The topcoat comprises: 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, and 26 parts of aliphatic isocyanate curing agent.

[0125] Comparative Example 3 is based on Example 4, except that the addition of fluorosilane-functionalized silicon carbide-coated carbon nanotubes in the topcoat is omitted.

[0126] Except for the above-mentioned differences in components, the preparation method of the homemade 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 tower are the same as those in Example 4.

[0127] Comparative Example 4

[0128] 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; calculated by weight,

[0129] 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 homemade 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 defoaming agent; 11 parts of modified phenolic amine curing agent, and 0.4 parts of accelerator.

[0130] 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, 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 defoaming agent, 10 parts of modified phenolic amine curing agent, and 0.4 parts of accelerator.

[0131] 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.

[0132] Comparative Example 4 is based on Example 4, except that the homemade modified montmorillonite in the intermediate paint is replaced by directly using commercially available montmorillonite, and no modification operation is performed on the montmorillonite.

[0133] Except for the above-mentioned component differences, the preparation method of the fluorosilane-functionalized silicon carbide-coated carbon nanotubes and the preparation method of the heavy-duty anti-corrosion coating applied to the outer wall of the wind power tower in Comparative Example 4 are the same as those in Example 4.

[0134] Comparative Example 5

[0135] 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; calculated by weight,

[0136] 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 homemade 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 defoaming agent; 11 parts of modified phenolic amine curing agent, and 0.4 parts of accelerator.

[0137] The intermediate paint includes: 21 parts of bisphenol A epoxy resin, 9 parts of active diluent, 7 parts of homemade modified montmorillonite, 33 parts of mica iron oxide, 13 parts of barium sulfate, 6 parts of talc, 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 defoaming agent, 10 parts of modified phenolic amine curing agent, and 0.4 parts of accelerator.

[0138] 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 parts of leveling agent, 0.5 parts of polyamide wax, 23 parts of solvent, and 26 parts of aliphatic isocyanate curing agent.

[0139] Comparative Example 5 is based on Example 4, except 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.

[0140] Except for the above-mentioned differences in components, the preparation method of the homemade modified montmorillonite in Comparative Example 5 and the preparation method of the heavy-duty anti-corrosion coating applied to the outer wall of the wind power tower are the same as those in Example 4.

[0141] Test example

[0142] Acid and alkali resistance test: Tested in accordance with the relevant test methods in standard GB / 9274 "Determination of resistance of paints and varnishes to liquid media";

[0143] Artificial aging resistance test: refer to the relevant test methods in GB / T 1865 "Paints and varnishes artificial weathering and artificial radiation exposure" to conduct 1200h artificial aging resistance test;

[0144] Moisture and heat resistance test: Refer to the GJB150 wet heat test standard. After applying the heavy-duty anti-corrosion coating on the steel plate, wait until it is completely dry, and then test it according to the test method therein;

[0145] Self-cleaning performance test: Apply a carbon black suspension that simulates dirt on the coating. After a period of time, use a small ultrasonic device to clean the coating surface. Then measure the amount of dirt remaining on the coating surface after cleaning. The weight unit is (mg).

[0146] The performance test results are shown in Table 1;

[0147] Table 1

[0148]

[0149] Table 1 Test results data analysis: Examples 1-5 of the present application have excellent performance in acid and alkali resistance test, artificial aging resistance test, and moisture and heat resistance test.

[0150] Compared with Example 4, the difference between Comparative Example 4 is that the homemade modified montmorillonite in the intermediate paint is replaced by commercially available montmorillonite. Although the substrate is not exposed, there are huge differences between the various properties, especially the moisture and heat resistance, and those of Example 4. The possible reason is that: the homemade modified montmorillonite used in Example 4 undergoes a cation exchange reaction, so that distearyldimethylammonium chloride replaces the cations between the montmorillonite layers and enters the montmorillonite layers, thereby increasing the montmorillonite interlayer spacing; and can interact with the carboxylic acid groups present in the subsequently introduced ricinoleic acid through hydrogen bonds. The entry of ricinoleic acid molecules will further expand the montmorillonite interlayer spacing, making it more evenly and finely dispersed in the intermediate paint and greatly extending the gas diffusion path; and the introduced ricinoleic acid contains double bonds, which can capture oxygen that may penetrate into the intermediate paint, thereby providing a more lasting barrier performance improvement to the heavy-duty anti-corrosion coating; thereby giving Example 4 excellent moisture and heat resistance.

[0151] The carbon nanotubes in Comparative Example 5 have not been modified in any way. Compared with Example 4, there are huge performance differences in artificial aging resistance and residual dirt. In addition, the added carbon nanotubes may also have the problem of uneven dispersion. The fluorosilane-functionalized silicon carbide-coated carbon nanotubes used in the examples have a high modulus and tensile strength ratio, which can effectively improve the toughness and crack resistance of the topcoat. The use of silicon carbide-coated carbon nanotubes can change the surface energy of the carbon nanotubes to a certain extent, which helps their dispersion in the topcoat. Silicon carbide has a certain absorption and scattering ability in the ultraviolet band, which can improve the anti-aging performance of the topcoat material; long-chain perfluorooctyltriethoxysilane was subsequently used, which contains ethoxy groups. The silanol groups generated after hydrolysis can undergo condensation reactions with the Si-OH groups on the surface of silicon carbide to form stable siloxane bonds, thereby firmly grafting the long-chain perfluorooctyl groups to the surface of silicon carbide through covalent bonds; and the perfluorooctyl groups contain a large number of CF bonds, which makes it difficult for pollutants to adhere, and the topcoat has a certain self-cleaning effect; that is, the amount of residual dirt is relatively small.

[0152] Comparative Example 1 has the worst performance. Compared with Comparative Examples 1-5, Comparative Example 2 has less residual dirt and relatively good aging resistance, but relatively poor acid and alkali resistance and humidity and heat resistance. Comparative Example 3 has relatively good acid and alkali resistance and humidity and heat resistance, but has high aging resistance and residual dirt. There is still a large performance gap between it and Examples 1-5.

[0153] The side effect is that the best performance can only be achieved by combining fluorosilane-functionalized silicon carbide-coated carbon nanotubes and homemade modified montmorillonite. The possible reasons for this are: the active sites at the microscopic interface formed by the homemade modified montmorillonite and the resin can interact with the polar groups in the topcoat, thereby enhancing the interlayer adhesion between the topcoat and the intermediate paint; by modifying the filler to promote interlayer bonding, and through the superposition of multi-level and multi-mechanism barriers, more efficient and longer-lasting protection is achieved under synergistic action, and the moisture-heat aging and corrosion resistance of the paint film of the heavy-duty anti-corrosion coating are improved, thereby achieving longer-term protection for the power tower.

[0154] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. 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, characterized in that: The primer is composed of the following 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 active diluent, 3-6 parts of homemade 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 is composed of the following parts: 16-22 parts of bisphenol A epoxy resin, 5-10 parts of active diluent, 5-8 parts of homemade modified montmorillonite, 25-35 parts of mica iron oxide, 8-15 parts of barium sulfate, 3 parts of talc. -7 parts, fumed silica 0.5-0.8 parts, titanium dioxide 2-5 parts, carbon black 0.1-0.3 parts, polyamide wax 0.2-0.5 parts, defoamer 0.2-0.5 parts, modified phenolic amine curing agent 7-11 parts, accelerator 0.1-0.5 parts; the topcoat is composed of: 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, and 18-28 parts of aliphatic isocyanate curing agent; The homemade modified montmorillonite in the intermediate paint is prepared by the following method: taking montmorillonite, dispersing it in distilled water, then adding sodium carbonate solution, heating it to 95 degrees Celsius, and magnetically stirring it for 20 minutes; then adding distearyldimethylammonium chloride to the mixed solution, continuing to stir, and filtering to obtain an intermediate product after the reaction is completed; then taking the intermediate product and ricinoleic acid, placing them in a reaction vessel, heating them to 60 degrees Celsius, stirring and reacting for 2 hours, taking out the mixture, and repeatedly washing it with methanol; placing the reaction product in a vacuum drying oven to fully dry it to constant weight, grinding it into fine powder, and sieving it through a 200-mesh sieve to prepare the homemade modified montmorillonite.

2. The heavy-duty anti-corrosion coating for the outer wall of a wind power tower according to claim 1, characterized in that: The active diluent in the primer and the intermediate paint is one of a monoepoxy glycidyl ether active diluent and a diepoxy glycidyl ether active diluent.

3. The heavy-duty anti-corrosion coating for the outer wall of a wind power tower according to claim 1, characterized in that: The defoamer in the primer and the mid-coat is BYK-066 N; the accelerator in the primer and the mid-coat is DMP-30.

4. The heavy-duty anti-corrosion coating for the outer wall of a wind power tower according to claim 1, characterized in that: The bisphenol A epoxy resin in the primer and the 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 fluorocarbon resin.

5. The heavy-duty anti-corrosion coating for the outer wall of a wind power tower according to claim 1, characterized in that: 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 for the outer wall of a wind power tower according to claim 1, characterized in that: The solvent in the topcoat is one of butyl acetate and xylene.

7. The heavy-duty anti-corrosion coating for the outer wall of a wind power tower according to claim 1, characterized in that: The preparation method of the fluorosilane-functionalized silicon carbide-coated carbon nanotubes in the topcoat is as follows: weighing silicon carbide-coated carbon nanotubes and adding them to anhydrous ethanol, ultrasonically dispersing them to obtain a suspension; transferring the carbon nanotubes to a three-necked flask, slowly adding glacial acetic acid to adjust the pH of the reaction system to 4.5; continuing magnetic stirring and slowly adding perfluorooctyltriethoxysilane, stirring evenly, and then slowly adding deionized water to control the hydrolysis rate; then heating the reaction system to 70 degrees Celsius and maintaining magnetic stirring to continue the reaction for 2 hours; after the reaction is completed, naturally cooling to room temperature, filtering and collecting the solid product; and repeatedly washing the product with sufficient anhydrous ethanol to completely remove unreacted substances; finally, placing the product in a vacuum drying oven and drying it to constant weight, thereby preparing the fluorosilane-functionalized silicon carbide-coated carbon nanotubes.

8. The heavy-duty anti-corrosion coating for the outer wall of a wind power tower according to claim 7, characterized in that: The method for preparing silicon carbide-coated carbon nanotubes comprises: placing polycarbosilane in n-hexane and ultrasonically dispersing the polycarbosilane; and then adding carbon nanotubes thereto; The reaction vessel was heated to 60 degrees Celsius and ultrasonic treatment was continued for 30 minutes. The mixture was then placed in a fume hood and the solvent was naturally evaporated at room temperature to obtain dry polycarbosilane-coated carbon nanotubes; the mixture was transferred to a quartz crucible and placed in a tube furnace under an inert atmosphere, heated to 240 degrees Celsius and kept warm for 90 minutes; then the temperature was continued to be raised to 1150 degrees Celsius and kept warm for 60 minutes; after the reaction was completed, the inert environment was continued to be maintained and naturally cooled to room temperature to obtain silicon carbide-coated carbon nanotubes.

9. The heavy-duty anti-corrosion coating for the outer wall of a wind power tower according to any one of claims 1 to 8, characterized in that: The preparation method of the heavy-duty anti-corrosion coating applied to the outer wall of a wind power tower comprises the following steps: adding bisphenol A epoxy resin and a reactive diluent into a stirring kettle, stirring and mixing at a low speed of 300-400 rpm until uniform; then adding zinc phosphate, zinc powder, homemade modified montmorillonite, defoamer, fumed silica, titanium dioxide, carbon black, and polyamide wax, stirring and dispersing at a speed of 600-800 rpm for 20 minutes; finally, adding a modified phenolic amine curing agent and an accelerator, stirring and mixing for 3 minutes, and mixing uniformly to prepare the primer; The intermediate paint is prepared by adding bisphenol A epoxy resin and reactive diluent into a stirring kettle, stirring at a low speed of 300-400 rpm to mix uniformly, then adding micaceous iron oxide, barium sulfate, talc, fumed silica, titanium dioxide, carbon black, polyamide wax, defoamer, and homemade modified montmorillonite, stirring and dispersing at a speed of 500-600 rpm for 30 minutes; finally, adding a modified phenolic amine curing agent and an accelerator, stirring for 3 minutes, and mixing uniformly to prepare the intermediate paint. The preparation method of the topcoat comprises the following steps: 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 a speed of 600-800 rpm for 40 minutes; and finally adding an aliphatic isocyanate curing agent, stirring for 3 minutes, and mixing evenly to prepare the topcoat.

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