Corrosion-resistant and ultraviolet-resistant protective coating for wind power generation equipment and preparation method of corrosion-resistant and ultraviolet-resistant protective coating

Abstract

The invention belongs to the technical field of composite coatings, and particularly relates to a corrosion-resistant and ultraviolet-resistant protective coating for wind power generation equipment and a preparation method thereof.The corrosion-resistant and ultraviolet-resistant protective coating for the wind power generation equipment is prepared from, by mass, 40-60 parts of gradient fluorosilicone modified polyurethane resin, 5-12 parts of core-shell type ZnO-coated MOFs composite particles, 1-3 parts of a curing agent, 1-3 parts of a curing agent and 1-3 parts of a curing agent. According to the invention, the problems of poor ultraviolet resistance, poor weather resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance and the like in the existing coating and the preparation process thereof are well solved; the shielding layer is single and incapable and has a poor self-repairing effect; and the coating toughness of an epoxy resin system is insufficient and cannot adapt to fatigue deformation of equipment under a vibration working condition.

Description

Technical Field

[0001] The present invention belongs to the technical field of coatings, and particularly relates to a corrosion-resistant and ultraviolet-resistant protective coating for wind power equipment and a preparation method thereof. Background Art

[0002] Wind power equipment is long-term exposed to complex outdoor environments, facing multiple tests such as ultraviolet radiation, salt spray erosion, drastic changes in temperature and humidity, and mechanical vibration. Taking an offshore wind farm as an example, the coating needs to withstand ultraviolet irradiation for more than 2000 hours per year on average, 3.5% NaCl salt spray corrosion, and alternating stresses caused by typhoons. Traditional protective coatings often exhibit failure problems such as cracking, powdering, and rusting within 3 - 5 years due to insufficient weather resistance. In addition, the curved surface structure and dynamic deformation characteristics of components such as wind turbine blades and tower barrels require the coating to have high flexibility, and conventional coating systems are difficult to meet the above performance requirements simultaneously.

[0003] In a Chinese invention patent with the authorized patent publication number CN110643266B, a montmorillonite / graphene oxide composite nanosheet material modified epoxy resin anticorrosive coating and its preparation method and application are disclosed. The anticorrosive coating consists of two components, A and B. Component A is epoxy resin, montmorillonite / graphene oxide composite nanosheet material, nano-silica, nano-titanium dioxide, mica powder, wetting and dispersing agent, and solvent, and component B is curing agent, defoaming agent, leveling agent, and solvent; the mass ratio of component A to component B is 100:20 - 100. Through an ion exchange reaction, a composite nanometer powder material with intercalated layers of two-dimensional sheet materials, modified montmorillonite and graphene, is prepared. The following limitations are exposed in practical applications: 1. The epoxy resin matrix itself lacks ultraviolet absorption groups and is prone to ester bond breakage and benzene ring oxidation under UV irradiation, resulting in yellowing of the coating and attenuation of mechanical properties. Although the added nano-titanium dioxide has certain ultraviolet absorption ability, it is prone to agglomeration due to its large particle size and can only shield ultraviolet rays with wavelengths < 350nm, unable to cope with the deep damage of long-wave ultraviolet rays to the coating.

[0004] 2. This solution relies on the physical shielding effect of montmorillonite / graphene oxide sheets but lacks an active response mechanism to coating damage. When microcracks occur in the coating due to mechanical impact or environmental stress, corrosive media can quickly penetrate along the defects to the matrix, and conventional corrosion inhibitors are prone to being quickly consumed in the initial stage due to the lack of a controlled release system.

[0005] 3. The coating of the epoxy resin system has large intrinsic brittleness. Although the strength can be improved by modification with nano-fillers, the flexibility is insufficient and it cannot withstand the fatigue deformation caused by long-term vibration of wind power equipment, and stress concentration is prone to occur at the coating-matrix interface, resulting in peeling.

[0006] Based on the above-mentioned defects existing in the prior art, it is urgently necessary to develop a corrosion-resistant and UV-resistant protective coating for wind power generation equipment with good anti-UV performance and weather resistance, having a multi-level anti-corrosion barrier and simultaneously avoiding the coating peeling caused by the fatigue deformation of the wind power generation equipment, as well as a preparation method therefor. Summary of the Invention

[0007] In view of the above problems, the present invention provides a corrosion-resistant and UV-resistant protective coating for wind power generation equipment and a preparation method therefor, which well solve the problems of poor anti-ultraviolet and weather resistance, single shielding layer and poor self-healing effect existing in the existing coatings and their preparation processes, and the insufficient toughness of the coatings in the epoxy resin system to adapt to the fatigue deformation under the vibration conditions of the equipment.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A corrosion-resistant and UV-resistant protective coating for wind power generation equipment, comprising the following components in parts by mass: 40-60 parts of gradient fluorosilicon-modified polyurethane resin, 5-12 parts of core-shell ZnO@MOFs composite particles, 8-15 parts of bentonite / graphene oxide hybrid sheets, 3-8 parts of phosphosilicate-ZnO composite nanoflowers, 2-5 parts of pH-sensitive mesoporous silica nanovalves, 1-3 parts of polyurea formaldehyde microcapsule corrosion inhibitor, and 0.5-2 parts of photosensitive silicone crosslinking agent.

[0009] Further, the fluorine content of the gradient fluorosilicon-modified polyurethane resin is 5-8 wt%, its surface contact angle > 110°, the gel content corresponding to the internal crosslinking density > 90%, and the tensile strength ≥ 25 MPa.

[0010] Further, in the core-shell ZnO@MOFs composite particles, MOFs is a ZIF-8 type metal-organic framework with a pore diameter of 0.3-0.5 nm.

[0011] Further, the thickness of the bentonite / graphene oxide hybrid sheets < 10 nm, the aspect ratio > 1000, and a phosphosilicate-ZnO composite is intercalated between the layers, and the composite is in a nanoflower-like structure with a particle size of 50-80 nm.

[0012] Further, the pore diameter of the pH-sensitive mesoporous silica nanovalves is 3 nm, the pH-sensitive mesoporous silica nanovalves are loaded with molybdate ions, and release corrosion inhibitor ions when the local pH of the coating > 9.

[0013] Further, the shell thickness of the polyurea formaldehyde microcapsule corrosion inhibitor is 200-500 nm, the core material is a composite of benzotriazole and sodium molybdate, and the release rate of the corrosion inhibitor ions is positively correlated with the damaged area of the coating.

[0014] A preparation method of the corrosion-resistant and UV-resistant protective coating for wind power generation equipment comprises the following steps: (1)Prepolymer synthesis: React polyurethane prepolymer, fluorosilicon-modified monomer and catalyst at 60 - 80 °C to produce gradient fluorosilicon-modified polyurethane resin; (2)In-situ loading of nanomaterials: Add zinc phosphate and silica sol to the resin obtained in step (1), and use the polymerization heat to drive self-assembly to generate phosphosilicate-ZnO composite nanoflowers; (3)Filler blending: Sequentially add core-shell ZnO@MOFs composite particles, bentonite / graphene oxide hybrid sheets, pH-sensitive mesoporous silica nanovalves and polyurea formaldehyde microcapsule corrosion inhibitors, and disperse them at a high speed of 800 - 1200 r / min for 30 - 60 minutes; (4)Magnetic field-shear synergistic coating: Use a roll coating device integrated with a pulsed magnetic field to perform directional coating at a magnetic field strength of 0.6 - 0.8 T and a shear rate of 1000 - 1500 s -1 ; (5)Dual curing: First, irradiate with a 365 nm UV-LED light source for 10 - 30 seconds to initiate surface curing, and then post-cure at 60 °C and RH80% for 12 hours.

[0015] Furthermore, in step (4), the frequency of the pulsed magnetic field is 10 - 50 Hz, the duty cycle is 20 - 40%, and the degree of two-dimensional filler alignment > 85%.

[0016] Furthermore, in step (5), the intensity of the UV-LED light source is 80 - 100 mW / cm², and the hydrolysis and condensation reaction of the siloxane cross-linking agent in the post-curing stage increases the cross-linking density of the coating by more than 30%.

[0017] Furthermore, the high-speed dispersion process in step (3) is implemented in three stages: The first stage: Disperse at 800 r / min for 10 minutes to preliminarily wet the filler; The second stage: Disperse at 1200 r / min for 25 minutes to achieve nanoparticle deagglomeration; The third stage: Disperse at 600 r / min for 5 minutes to eliminate bubbles in the system.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The coating is given low surface energy and excellent weather resistance by fluorosilicon elements. A fluorine content of 5 - 8 wt% can effectively resist the degradation of polymer chains caused by ultraviolet rays; the high gel content inside ensures that the coating is not easily cracked under long-term exposure to wind and sun, and is more adaptable to the dynamic deformation requirements of wind power equipment than the epoxy resin system. At the same time, the nanopores of ZIF-8 type MOFs and ZnO form a synergistic shielding structure, which is far superior to the ultraviolet absorption ability of nano-titanium dioxide in the comparative technology and can block the penetration of ultraviolet rays in the 300 - 400 nm band to the coating; Retard the penetration of corrosive media through the bentonite / graphene oxide hybrid sheet structure; combined with the phosphosilicate-ZnO nanoflowers embedded between the layers, which have both chemical corrosion inhibition and physical shielding effects. Compared with the simple montmorillonite / graphene oxide composite sheet in the comparative technology, its anti-corrosion mechanism is more diverse. At the same time, when the pH > 9 at the coating breakage, the pH-sensitive mesoporous silica nanovalve releases MoO4 2- , the addition of polyurea formaldehyde microcapsules endows the coating with both mechanical strength and permeability. The release rate of the corrosion inhibitor is intelligently matched with the degree of breakage, forming a dual protection of "passive barrier + active corrosion inhibition" and improving the adaptability of the coating in coastal areas and chemical environments; In the present invention, a 0.6 - 0.8T pulsed magnetic field (frequency of 10 - 50Hz) and 1000 - 1500s -1 Shearing rate drives the orientation degree of two-dimensional sheets > 85%, forming a dense layered structure, and the diffusion path of corrosive media is extended by more than 3 times; the conventional blending method in the comparative technology is difficult to achieve the ordered arrangement of fillers, and the coating has a higher porosity. At the same time, the phosphosilicate-ZnO nanoflowers are self-assembled by polymerization heat and form a chemical bond with the resin matrix; after surface curing is initiated by UV-LED, the siloxane cross-linking agent further condenses under humid and hot conditions, increasing the cross-linking density by 30%, which is superior to the conventional curing in the prior art. Description of the Drawings

[0019] Figure 1 SEM image of the grinding breakage of polyurea formaldehyde microcapsules in Example 4. Detailed Description of the Invention

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0021] In this embodiment, the neutral salt spray test standard in GB / T 10125-2021 "Artificial Atmosphere Corrosion Test - Salt Spray Test" is adopted for the salt spray tests of Example 1, Example 2, Comparative Example 1 and Comparative Example 2.

[0022] In this embodiment, the pH-sensitive mesoporous silica nanovalve is a mesoporous silica nanoparticle loaded with molybdate ions and grafted with a pH-responsive polymer on the surface. When the local pH of the coating > 9, the grafted pH-responsive polymer on the surface of the mesoporous silica nanoparticle reacts to promote the opening of the mesopores, thereby releasing the molybdate ions loaded in the silica nanoparticles.

[0023] In this embodiment, the photosensitive siloxane crosslinking agent used is a conventional curing agent. In this embodiment, acryloxypropyltrimethoxysilane can be used to generate free radicals under ultraviolet light at 365 nm, initiating the crosslinking of double bonds in the polyurethane resin. Example 1

[0024] 1. Synthesis of gradient fluorosilicon modified polyurethane resin Weigh 100 parts of polyether polyol (molecular weight 2000) and 50 parts of isophorone diisocyanate (IPDI), and react at 80 °C for 2 h to obtain a polyurethane prepolymer; Add 15 parts of perfluorooctylethyl acrylate (fluorine content adjusted to 5 wt%) and 10 parts of γ-methacryloxypropyltrimethoxysilane, use dibutyltin dilaurate (0.5 parts) as a catalyst, and react at 60 °C for 4 h to generate a gradient fluorosilicon modified polyurethane resin (surface contact angle 115°, gel content 92%, tensile strength 28 MPa).

[0025] 2. Preparation of core-shell ZnO@ZIF-8 composite particles Dissolve 2-methylimidazole (2.2 g) in methanol (100 mL), add an aqueous solution of zinc nitrate (1.4 g), and stir at room temperature for 24 h to generate ZIF-8 nanoparticles (pore size 0.4 nm); Use the precipitation method to coat a ZnO layer on the surface of ZIF-8: Mix the ZIF-8 dispersion with a 0.1 mol / L Zn(NO3)2 solution, dropwise add ammonia water until pH = 9, react at 60 °C for 3 h, and obtain ZnO@ZIF-8 composite particles after centrifugation and washing.

[0026] 3. Preparation of bentonite / graphene oxide hybrid sheets Ultrasonically disperse bentonite (5 parts) in deionized water (200 mL), add a graphene oxide (10 parts) dispersion, and mechanically stir for 4 h; Add and dropwise add zinc phosphosilicate sol (containing Zn 2 + and PO4 3- , SiO3 2- ) according to 40% of the mass of bentonite, and carry out self-assembly driven by polymerization heat at 80 °C to generate hybrid sheets (thickness 8 nm, aspect ratio 1200) with zinc phosphosilicate-ZnO nanoflowers (particle size 60 nm) intercalated between layers.

[0027] 4. Preparation of the coating Take 50 parts by mass of the gradient fluorosilicon modified polyurethane resin, add 5 parts of ZnO@ZIF-8 composite particles, 8 parts of hybrid sheets, 3 parts of zinc phosphosilicate-ZnO nanoflowers, 2 parts of pH-sensitive mesoporous silica nanovalves (loaded with MoO4 2- ), 2 parts of polyurea formaldehyde microcapsules (core material is benzotriazole / sodium molybdate), and 1 part of the photosensitive siloxane crosslinking agent; Disperse in three stages: disperse at 800 r / min for 10 min, then at 1200 r / min for 25 min, and then at 600 r / min for 5 min; This example uses the magnetic field - shear flow field synergistic coating technology, with a pulsed magnetic field (0.7 T, frequency 20 Hz, duty cycle 30%) and 1200 s -1 Shear rate for synergistic coating on Q235 steel plate. Graphene oxide is a conventional magnetic material, and the bentonite / graphene oxide hybrid sheet, as a composite material, is also affected by the pulsed magnetic field. The bentonite / graphene oxide hybrid sheets are oriented under the action of the magnetic field and the drag force of the shear flow field, and the degree of orientation of the bentonite / graphene oxide hybrid sheets > 85%. The magnetic field - shear flow field synergistic coating technology is a conventional technology and will not be elaborated here; Irradiate with 365 nm UV - LED (90 mW / cm 2 ) for 20 s, and then cure at 60 °C and RH 80% for 12 h.

[0028] 5. Performance testing Salt spray resistance test: No rusting after 5000 h; UV aging (xenon lamp for 1000 h): ΔE = 1.2, no powdering; Tensile strength 26 MPa, elongation at break 320%; When the pH > 9 at the damaged part of the coating, the release rate of MoO4 2- The correlation coefficient R² between the release rate and the damaged area is 0.96. Example 2

[0029] 1. Key parameter adjustment Increase the fluorine content of the gradient fluorosilicone resin in Example 1 to 8 wt%, and the surface contact angle is 120°; Increase the dosage of ZnO@ZIF - 8 composite particles in Example 1 to 12 parts, and the UV shielding efficiency is 98.8%; Magnetic field strength 0.8 T, shear rate 1500 s -1 , and the degree of orientation of two - dimensional fillers is 88%. 2. Performance advantages The salt spray resistance time is extended to 5500 h, suitable for offshore wind power; Bending test (curvature radius 5 mm) 1000 times without cracking, improving the dynamic adaptability; The tensile strength retention rate after hygrothermal aging (60 °C, RH 95%, 1000 h) is 95%. Example 3

[0030] 1. Key parameter adjustment Reduce the gradient fluorosilicone - modified polyurethane resin in Example 1 to 40 parts by mass. 2. Performance Test Salt spray resistance test: no rust after 5000h; Tensile strength 18MPa, elongation at break 280%; Bending test (curvature radius 5mm), no cracking after 1000 times, tensile strength retention rate 95%; Tensile strength retention rate 90% after damp heat aging (60°C, RH95%, 1000h).

[0031] Comparative Example 1: 1. Formulation difference Replace the gradient fluorosilicon modified polyurethane resin in Example 1 with epoxy resin, and do not add pH-sensitive mesoporous silica nanovalve. The other components are the same as those in Example 1.

[0032] 2. Test results Salt spray resistance time is reduced to 3000h, the coating shows reticular cracks, rust appears at the damaged part of the coating, the corrosion inhibitor release has no pH response, is rapidly consumed in the initial stage, and the protection fails in the later stage.

[0033] Comparative Example 2: 1. Process difference Change the process in Example 1 to use conventional high-speed dispersion, the degree of two-dimensional filler orientation arrangement <30%, single thermal curing (80°C, 24h), and do not use UV-LED initiation.

[0034] 2. Performance comparison Rust appears after 3500h of salt spray test, the diffusion rate of the corrosive medium is 2.5 times higher than that in Example 1, the coating porosity is 6%, the tensile strength is 18MPa, and the flexibility is insufficient (elongation at break 180%).

[0035] Comparative Example 3: Example 1 in the specification of the Chinese invention patent with the authorized patent announcement number CN110643266B, "A Montmorillonite / Graphene Oxide Composite Nanosheet Material Modified Epoxy Resin Anticorrosive Coating and Its Preparation Method and Application" is used as a comparative example.

[0036] The performance test is carried out according to GB / T10125-2012 "Artificial Atmosphere Corrosion Test - Salt Spray Test" for the salt spray corrosion test of the coating, and the effective protection time of the coating can reach 600h. Example 4

[0037] 1. Preparation of polyurea formaldehyde microcapsules, including: Preparation of core material solution: Dissolve 0.5g of benzotriazole and 0.5g of sodium molybdate in 50ml of deionized water, stir at 500rpm in a 60°C water bath for 30 minutes; Emulsion system construction: The core material solution was added to 200 ml of aqueous solution containing 1% SDS, and dispersed and emulsified at a high speed of 1000 rpm for 10 minutes to form an O / W emulsion.

[0038] In-situ polymerization coating: The pH of the emulsion was adjusted to 3.0 with 0.1M HCl. A premixed solution of formaldehyde (1.2 g) and urea (0.8 g) was added dropwise. The reaction was carried out at a constant temperature of -55°C for 3 hours with continuous stirring at 500 rpm. After the reaction, it was cooled, and the microcapsules were collected by centrifugation, washed three times with water, and then freeze-dried to obtain polyurea formaldehyde microcapsules.

[0039] Verification of sustained release correlation The microcapsules were subjected to controllable mechanical grinding, and the proportion of the damaged area was analyzed by SEM images; the cumulative release rate of benzotriazole was measured in simulated seawater at 25°C, and the relationship between the damaged area and the release rate was fitted to obtain R² = 0.97.

[0040] 3. Accelerated test for the repair of polyurea formaldehyde microcapsules The Q235 steel plate coated with the corrosion-resistant and ultraviolet-resistant protective coating for wind power generation equipment in Example 1 was artificially scratched on the coating (the damaged area was 1 cm 2 ), and immersed in 3.5% NaCl solution; The release amount of corrosion inhibitor ions reached 60% of the total amount within 24 hours, a passivation film was formed at the damaged area, and no extended corrosion occurred.

[0041] From the above examples and comparative examples, it can be obtained that: Synergistic effect of gradient fluorosilicone resin: Fluorosilicon elements endow the coating with low surface energy and high cross-linking density, solving the problems of insufficient weather resistance and brittleness defects of epoxy resin-based coatings.

[0042] Protective advantages of the intelligent response system: The pH-sensitive nano-valve and microcapsule corrosion inhibitor achieve "damage-response" dynamic protection, and the service life is extended by more than 5 times compared with the traditional physical shielding mechanism.

[0043] Process innovation of directional structure regulation: The magnetic field-shear synergistic coating makes the fillers arranged orderly, the diffusion path of the corrosive medium is extended by 3 times, and the cross-linking density is improved by double curing, and the comprehensive performance exceeds the existing technology.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A corrosion-resistant and UV-resistant protective coating for wind power generation equipment, characterized in that, It includes the following components in parts by mass: 40-60 parts of gradient fluorosilicon-modified polyurethane resin, 5-12 parts of core-shell ZnO@MOFs composite particles, 8-15 parts of bentonite / graphene oxide hybrid sheets, 3-8 parts of phosphosilicate-ZnO composite nanoflowers, 2-5 parts of pH-sensitive mesoporous silica nanovalves, 1-3 parts of polyurea formaldehyde microcapsule corrosion inhibitor, and 0.5-2 parts of photosensitive silicone crosslinking agent.

2. The corrosion-resistant and UV-resistant protective coating for wind power generation equipment according to claim 1, characterized in that: The fluorine content of the gradient fluorosilicon-modified polyurethane resin is 5-8 wt%, its surface contact angle > 110°, the gel content corresponding to the internal crosslinking density > 90%, and the tensile strength ≥ 25 MPa.

3. The corrosion-resistant and UV-resistant protective coating for wind power generation equipment according to claim 1, characterized in that: In the core-shell ZnO@MOFs composite particles, MOFs is ZIF-8 type metal-organic framework with a pore size of 0.3-0.5 nm.

4. The corrosion-resistant and UV-resistant protective coating for wind power generation equipment according to claim 1, wherein: The thickness of the bentonite / graphene oxide hybrid sheets < 10 nm, the aspect ratio > 1000, and phosphosilicate-ZnO composite is intercalated between the layers. The composite is in the shape of nanoflowers with a particle size of 50-80 nm.

5. A corrosion-resistant and UV-resistant protective coating for wind power generation equipment according to claim 1, characterized in that: The pore size of the pH-sensitive mesoporous silica nanovalves is 3 nm. The pH-sensitive mesoporous silica nanovalves are loaded with molybdate ions and release corrosion inhibitor ions when the local pH of the coating > 9.

6. The corrosion-resistant and ultraviolet-resistant protective coating for wind power generation equipment according to claim 1, characterized in that: The shell thickness of the polyurea formaldehyde microcapsule corrosion inhibitor is 200-500 nm, and the core material is a composite of benzotriazole and sodium molybdate. The release rate of corrosion inhibitor ions is positively correlated with the damaged area of the coating.

7. A preparation method of the corrosion-resistant and ultraviolet-resistant protective coating for wind power generation equipment according to any one of claims 1-6, characterized in that, It includes the following steps: (1) Prepolymer synthesis: React polyurethane prepolymer, fluorosilicon-modified monomer and catalyst at 60-80 °C to generate gradient fluorosilicon-modified polyurethane resin; (2) In-situ loading of nanomaterials: Add zinc phosphate and silica sol to the resin obtained in step (1), and use the polymerization heat to drive self-assembly to generate phosphosilicate-ZnO composite nanoflowers; (3) Filler blending: Sequentially add core-shell ZnO@MOFs composite particles, bentonite / graphene oxide hybrid sheets, pH-sensitive mesoporous silica nanovalves and polyurea formaldehyde microcapsule corrosion inhibitor, and disperse at a high speed of 800-1200 r / min for 30-60 minutes; (4) Magnetic field-shear synergistic coating: using roller coating equipment with integrated pulse magnetic field, at a magnetic field strength of 0.6-0.8T and 1000-1500s -1 Directional coating at shear rate; (5) Dual curing: First irradiate with a 365 nm UV-LED light source for 10-30 seconds to initiate surface curing, and then post-cure at 60 °C and RH80% for 12 hours.

8. The preparation method of the corrosion-resistant and UV-resistant protective coating for wind power generation equipment according to claim 7, characterized in that, In step (4), the frequency of the pulsed magnetic field is 10-50 Hz, the duty cycle is 20-40%, and the two-dimensional filler alignment degree > 85%.

9. The preparation method of the corrosion-resistant and UV-resistant protective coating for wind power generation equipment according to claim 7, characterized in that, In step (5), the intensity of the UV-LED light source is 80-100 mW / cm², and the hydrolysis and condensation reaction of the silicone crosslinking agent in the post-curing stage increases the crosslinking density of the coating by more than 30%.

10. The preparation method according to claim 7, characterized in that: The high-speed dispersion process in step (3) is implemented in three stages: The first stage: Disperse at 800 r / min for 10 minutes to preliminarily wet the filler; The second stage: Disperse at 1200 r / min for 25 minutes to achieve nanoparticle deagglomeration; The third stage: Disperse at 600 r / min for 5 minutes to eliminate bubbles in the system.

Images