Highly elastic water-based acrylic nano-reflective thermal insulation coating and preparation method, and anti-corrosion and thermal insulation treatment method for rusted high-speed railway steel structure platform

Abstract

The present application discloses a highly elastic water-based acrylic nano-reflective thermal insulation coating and a preparation method thereof. The highly elastic water-based acrylic nano-reflective thermal insulation coating comprises: a highly elastic water-based acrylic copolymer resin; nano titanium dioxide; a dispersant; a defoaming agent and water; the highly elastic water-based acrylic copolymer resin comprises: ethylhexyl acrylate; butyl acrylate; methyl methacrylate; a peroxide initiator; an anionic emulsifier; a nonionic emulsifier; a film-forming aid and water; and also discloses a method for anti-corrosion and thermal insulation treatment of a rusted high-speed railway steel structure platform, comprising destroying rust and damaged coatings on steel structure columns and frames and polishing and removing them; polishing and removing rust spots on the ceiling; applying a rust converter to the entire surface of the steel structure columns and frames and the rust spots on the ceiling, and coating the entire surface of the high-speed railway steel structure platform with an anti-corrosion primer and the highly elastic water-based acrylic nano-reflective thermal insulation coating in sequence to achieve anti-corrosion treatment and thermal insulation treatment.

Description

Technical Field

[0001] The present application relates to the technical field of coating compositions, and in particular to a highly elastic water-based acrylic nano-reflective thermal insulation coating and a preparation method thereof, and also to a method for anti-corrosion and thermal insulation treatment of rusted high-speed railway steel structure platforms. Background Art

[0002] The energy of solar energy is very high. In summer, the solar energy received by each square meter of roof can reach 800-1000 watts. Therefore, the roof temperature can reach 60-75℃ and the wall temperature can reach 45-60℃. Water-based reflective heat-insulating coatings can be applied on cement concrete roofs, heat-insulating brick roofs, color steel tile roofs, plastic tile roofs, glazed tile roofs, ceramic tile roofs, exterior walls, and window glass. It reflects part or even most of the sunlight energy into the air, thereby greatly reducing the temperature of the building surface. Generally, the roof can be reduced by 25℃-30℃, and the wall can be reduced by 10℃-15℃, thereby reducing the indoor temperature of the building by 5-15℃, which not only improves the human comfort, but also improves the working and living environment, and also saves 50% of the air conditioning electricity consumption.

[0003] At present, ordinary water-based reflective heat-insulating coatings are composed of resins, fillers, reflective fillers, additives, etc. Although the reflective heat-insulating effect of the coating is good, the coating has poor elasticity, is not resistant to vibration, is easy to crack, and is not resistant to rain erosion. Therefore, the reflective heat-insulating effect can only be maintained for a short time, which is not conducive to promotion and application.

[0004] A large part of the high-speed rail platforms built in my country are steel structures because steel structures have a short construction period and low cost, which is particularly suitable for projects with tight construction periods and low budgets such as high-speed rail platforms. Due to long-term exposure to the sun and rain, and the vibration caused by high-speed rail operation, the anti-corrosion coating of the steel structure platform is prone to cracking and aging, causing the steel structure to rust, the coating to fall off, and the anti-corrosion failure, which in turn affects the appearance and life of the steel structure platform. In addition, steel structure platforms usually do not have a heat insulation layer, resulting in the platform ceiling temperature reaching more than 75°C in summer, and the passenger riding environment is poor, and there is even a risk of heat stroke. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a highly elastic water-based acrylic nano reflective thermal insulation coating, and the technical solution adopted is:

[0006] A highly elastic water-based acrylic nano reflective heat-insulating coating, the raw materials of which include, by weight percentage:

[0007]

[0008] The raw materials of the high elastic water-based acrylic copolymer resin include, by weight percentage:

[0009]

[0010]

[0011] The technical solution adopted by an embodiment of the present invention to solve the technical problem is: the raw materials include, by weight percentage:

[0012]

[0013]

[0014] A technical solution adopted by an embodiment of the present invention to solve the technical problem is: the anionic emulsifier is polyoxyethylene ether ammonium sulfate.

[0015] A technical solution adopted by an embodiment of the present invention to solve the technical problem is: the non-ionic emulsifier is fatty alcohol polyoxyethylene ether.

[0016] A technical solution adopted by an embodiment of the present invention to solve the technical problem is: the peroxide initiator is ammonium persulfate or potassium persulfate.

[0017] An embodiment of the present invention solves the technical problem by adopting a technical solution as follows: the preparation method of the highly elastic water-based acrylic copolymer resin comprises:

[0018] Step 1, weigh the raw materials according to the formula;

[0019] Step 2, dissolving the peroxide initiator in deionized water to prepare a 10 wt % initiator solution;

[0020] Step 3, dissolving anionic emulsifier and nonionic emulsifier in deionized water to prepare a 5wt% emulsifier solution, wherein the mass ratio of anionic emulsifier to nonionic emulsifier in the emulsifier solution is 2:1, retaining a portion of the emulsifier solution, and adding ethylhexyl acrylate, acrylic acid monomer, and methyl methacrylate monomer into the remaining emulsifier solution to disperse, to obtain a monomer emulsion;

[0021] Step 4: Add the retained emulsifier solution into the reaction container, heat it to 80°C-90°C, add part of the initiator solution and part of the monomer emulsion into the reaction container and stir evenly, then gradually drop the remaining monomer emulsion and the remaining initiator solution into the reaction container, stir and react at about 80°C-90°C for about 4-5h, then heat it to 90°C-100°C, continue to react for 1-2h under vacuum conditions, then cool it to 40°C-50°C, add a film-forming aid, stir evenly, and obtain a highly elastic water-based acrylic copolymer resin.

[0022] The preparation method of the above-mentioned highly elastic water-based acrylic nano reflective thermal insulation coating in the present application is characterized by comprising:

[0023] STEP1, weigh the raw materials according to the formula;

[0024] STEP 2, add the dispersant to part of the water and stir evenly to obtain a dispersant aqueous solution;

[0025] STEP 3, add nano titanium dioxide to the dispersant aqueous solution, stir evenly, then add aqueous silver paste, continue stirring and mixing evenly to obtain a mixed solution;

[0026] STEP4. Add the highly elastic water-based acrylic copolymer resin to the mixed solution obtained in STEP3, add the remaining water and defoamer, stir evenly, and obtain a highly elastic water-based acrylic nano reflective thermal insulation coating.

[0027] The present application also proposes a method for anti-corrosion and heat insulation treatment of a corroded high-speed railway steel structure platform, which is characterized by comprising:

[0028] S1. Use dry ice freezing technology to freeze and destroy the rust and damaged coating on the steel structure columns and frames of the high-speed railway steel structure platform, and then polish and remove the remaining rust and damaged coating on the steel structure columns and frames of the high-speed railway steel structure platform;

[0029] S2. Grind and remove the rust spots on the ceiling of the high-speed railway steel structure platform;

[0030] S3, applying a rust conversion agent to the entire surface of the steel structure column and the frame, and applying a rust conversion agent to the rusted spots on the ceiling; converting the floating rust adhering to the steel structure column, the frame surface and the rusted parts of the ceiling into a corrosion-resistant conversion film, and waiting for the conversion film to dry;

[0031] S4. Apply water-based epoxy anti-corrosion primer to the entire surface of the steel structure column, frame surface and ceiling;

[0032] S5. Apply the highly elastic water-based acrylic nano-reflective thermal insulation coating as described in any one of claims 1 to 6 on the surface of the dried water-based epoxy anti-corrosion primer.

[0033] The technical solution adopted by an embodiment of the present invention to solve its technical problem is: the raw materials of the rust conversion agent include, by weight percentage, 10-40% ethylhexyl acrylate, 1-20% methacrylic acid, 0-20% acrylic acid, 0.25-0.5% peroxide initiator, 1-3% anionic emulsifier, 0.5-1.5% nonionic emulsifier, 1-3% film-forming aid, and the balance is water.

[0034] An embodiment of the present invention adopts a technical solution to solve the technical problem as follows: the preparation method of the rust conversion agent comprises:

[0035] S1. Weigh the raw materials according to the formula;

[0036] S2, dissolving the peroxide initiator in water to prepare a 10 wt % initiator solution;

[0037] S3, dissolving anionic emulsifier and nonionic emulsifier in water to prepare a 5wt% emulsifier solution, wherein the mass ratio of anionic emulsifier to nonionic emulsifier in the emulsifier solution is 2:1, retaining a small amount of emulsifier solution, adding ethylhexyl acrylate, methacrylic acid, and acrylic acid monomers into the remaining emulsifier solution and dispersing them to obtain a monomer emulsion;

[0038] S4. Add the retained emulsifier solution into the reaction container, heat it to 80-85°C, add part of the monomer emulsion and initiator solvent and stir evenly, then gradually drop the remaining monomer emulsion and initiator solution into the reaction container, stir and react at about 80°C for about 4-5h, heat it to 90-95°C, continue to react for 1-2h under vacuum conditions and then cool it down to 40-50°C, add film-forming aid, stir evenly to obtain a water-based acrylate copolymer type rust converter.

[0039] Beneficial effects of the present invention:

[0040] (1) The elongation at break of the highly elastic water-based acrylic copolymer resin can reach more than 800%, and the elongation at break of the highly elastic water-based acrylic nano-reflective thermal insulation coating can reach more than 460%, with the lowest being more than 200%. It is resistant to aging, washing, heat and cold, and can be used outdoors for a long time. It is suitable for areas with high vibration, heavy rainfall, high temperature and high cold.

[0041] (2) Highly elastic water-based acrylic nano-reflective heat-insulating coatings can be made into transparent, silver-gray, white or other light colors, and can be applied to window glass, exterior walls, color steel tiles, steel structures, concrete roofs, plastic tile roofs and glazed tile roofs. They can reflect 45-90% of sunlight into the air, thereby reducing the surface temperature and indoor temperature of buildings, improving human comfort, improving the working environment and living environment, and saving air conditioning electricity.

[0042] (3) Highly elastic water-based acrylic nano-reflective thermal insulation coating has good elasticity and density, so it has good waterproof function. When applied on exterior walls and roofs, it can also act as a waterproof coating;

[0043] (4) The water-based acrylic reflective thermal insulation coating is resistant to aging, highly elastic, and resistant to vibration, and has a sunlight reflectivity of more than 85%, thereby achieving the purpose of environmentally friendly anti-corrosion and thermal insulation treatment of rusted high-speed railway steel structures. DETAILED DESCRIPTION

[0044] The terms used in the present invention, unless otherwise specified, generally have the meanings commonly understood by those of ordinary skill in the art. The present invention is further described in detail below in conjunction with specific examples and with reference to data. It should be understood that this embodiment is only for illustrating the present invention, and is not intended to limit the scope of the present invention in any way.

[0045] In the following examples, various processes and methods not described in detail are conventional methods known in the art. The materials, reagents, devices, instruments, equipment, etc. used in the following examples, unless otherwise specified, can be obtained from commercial sources.

[0046] In the present application, a highly elastic water-based acrylic nano reflective heat-insulating coating is characterized in that the raw materials include, by weight percentage:

[0047]

[0048] The raw materials of the high elastic water-based acrylic copolymer resin include, by weight percentage:

[0049]

[0050]

[0051] Based on the above content, embodiments of the present application are proposed. The raw material composition of the high elastic water-based acrylic copolymer resin in the embodiments is shown in Table 1.

[0052] Table 1

[0053]

[0054] The preparation method of the highly elastic water-based acrylic copolymer resin in the present application comprises:

[0055] Step 1, weigh the raw materials according to the formula;

[0056] Step 2, dissolving the peroxide initiator in deionized water to prepare a 10 wt % initiator solution;

[0057] Step 3: dissolving anionic emulsifier and nonionic emulsifier in deionized water to prepare a 5wt% emulsifier solution, wherein the mass ratio of anionic emulsifier to nonionic emulsifier in the emulsifier solution is 2:1; after retaining a small amount of emulsifier solution, ethylhexyl acrylate, acrylic acid monomer, and methyl methacrylate monomer are added to the emulsifier solution and dispersed to obtain a monomer emulsion.

[0058] Step 4: Add a small amount of retained emulsifier solution into the reaction container, heat it to 80°C, add part of the monomer emulsion and part of the initiator solution into the reaction container and stir evenly, then gradually drop the remaining monomer emulsion and the remaining initiator solution into the reaction container, stir and react at about 80°C for about 4h, then heat it to 90°C, continue to react for 1h under vacuum conditions and then cool it down. After cooling to 40°C, add a film-forming aid and stir evenly to obtain a highly elastic water-based acrylic copolymer resin.

[0059] The raw materials and composition of the highly elastic water-based acrylic nano reflective thermal insulation coatings in Examples 1-3 are shown in Table 1.

[0060] Components Example 1 Example 2 Example 3 High elastic waterborne acrylic copolymer resin 40％ 50％ 55％ Nano Titanium Dioxide 2％ 3％ 4％ Dispersants 1.5％ 2％ 2.5％ Defoaming agent 0.3％ 0.3％ 0.3％ water margin margin margin

[0061] The preparation method of the highly elastic water-based acrylic nano reflective heat-insulating coating in Examples 1-3 comprises:

[0062] STEP1, weigh the raw materials according to the formula;

[0063] STEP 2, add the dispersant to part of the water and stir evenly to obtain a dispersant aqueous solution;

[0064] STEP 3, add nano titanium dioxide to the dispersant aqueous solution, stir evenly, then add aqueous silver paste, continue stirring and mixing evenly to obtain a mixed solution;

[0065] STEP 4. Add the highly elastic water-based acrylic copolymer resin in composition 1 to the mixed solution prepared in STEP 3, add the remaining water and defoamer, stir evenly, and obtain a highly elastic water-based acrylic nano reflective thermal insulation coating.

[0066] The present application also proposes a silver-gray high-elasticity water-based acrylic nano-reflective heat-insulating coating, the raw materials of which include, by weight percentage:

[0067]

[0068] The particle size of nano titanium dioxide is in the range of 10 to 100 nm. The surface of nano titanium dioxide can also be treated. The surface treatment methods include but are not limited to hydrophilic treatment, hydrophobic treatment, thermal conductivity treatment and the like.

[0069] Based on the above content, Examples 4 to 6 of the present application are proposed. The raw materials and composition of the high-elastic water-based acrylic nano-reflective thermal insulation coatings in Examples 4 to 6 are shown in Table 3.

[0070] Table 3

[0071]

[0072]

[0073] The preparation method of the silver-gray high-elasticity water-based acrylic nano-reflective heat-insulating coating in this embodiment comprises:

[0074] STEP1, weigh the raw materials according to the formula;

[0075] STEP2. Add the dispersant to a small amount of water and stir evenly to obtain a dispersant aqueous solution.

[0076] STEP 3. Add nano titanium dioxide to the dispersant aqueous solution, stir evenly, then add aqueous silver paste, continue stirring until mixed evenly to obtain a mixed solution;

[0077] STEP4. Add the highly elastic water-based acrylic copolymer resin of composition 1 into the mixed solution of STEP3, add the defoamer and the remaining water, stir evenly, and obtain a silver-gray highly elastic water-based acrylic nano-reflective thermal insulation coating.

[0078] The present application also proposes a white highly elastic water-based acrylic nano reflective heat-insulating coating, the raw materials of which include, by weight percentage:

[0079]

[0080]

[0081] Based on the above content, Examples 7-9 of the present application are proposed. The raw materials and composition of the high-elasticity water-based acrylic nano-reflective thermal insulation coatings in Examples 7-9 are shown in Table 4.

[0082] Table 4

[0083] Components Example 7 Example 8 Example 9 High elastic waterborne acrylic copolymer resin 35％ 40％ 50％ Precipitated calcium carbonate 5％ 5％ 5％ Nano Titanium Dioxide 0.5％ 1％ 1.5％ Rutile Titanium Dioxide 30％ 25％ 20％ Dispersants 1.5％ 2％ 2.5％ Defoaming agent 0.3％ 0.3％ 0.3％ The balance is water margin margin margin

[0084] The preparation method of the white highly elastic water-based acrylic nano reflective heat-insulating coating in Examples 7-9 comprises:

[0085] STEP1, weigh the raw materials according to the formula;

[0086] STEP 2. Add the dispersant to a small amount of water and stir evenly to obtain a dispersant aqueous solution;

[0087] STEP 3. Add precipitated calcium carbonate to the dispersant aqueous solution, stir evenly, add nano titanium dioxide, continue to stir evenly, then add rutile titanium dioxide, continue to stir and mix evenly to obtain a mixed solution;

[0088] STEP 4, add the high elasticity water-based acrylic copolymer resin of composition 1 to the mixed solution prepared in STEP 3, add a defoamer and the remaining amount of water, stir evenly, and obtain a preparation method for a white high elasticity water-based acrylic nano reflective thermal insulation coating.

[0089] The present application also proposes a colorful high-elasticity water-based acrylic nano-reflective heat-insulating coating. The raw materials of the high-elasticity water-based acrylic nano-reflective heat-insulating coating include, by weight percentage:

[0090]

[0091] Based on the above content, Examples 10-12 of the present application are proposed. The raw materials and composition of the high-elastic water-based acrylic nano-reflective thermal insulation coatings in Examples 10-12 are shown in Table 5.

[0092] Table 5

[0093]

[0094]

[0095] The method for preparing the colorful high elastic water-based acrylic nano reflective heat insulation coating in Examples 10 to 12 comprises:

[0096] STEP1, weigh the raw materials according to the formula;

[0097] STEP2. Add the dispersant to a small amount of water and stir evenly to obtain a dispersant aqueous solution;

[0098] STEP 3. Add precipitated calcium carbonate to the dispersant aqueous solution and stir evenly, then add precipitated white carbon black and stir and mix evenly, then add nano titanium dioxide and continue to stir and mix evenly, then add rutile titanium dioxide and stir and mix evenly to obtain a mixed solution;

[0099] STEP4. Add the high elastic water-based acrylic copolymer resin of composition 1 to the mixed solution prepared in STEP3, add the defoamer and the remaining water, stir evenly, add the light-colored water-based color paste, stir evenly, and obtain a colorful high elastic water-based acrylic nano reflective thermal insulation coating.

[0100] The high-elasticity water-based acrylic nano-reflective thermal insulation coatings prepared in Examples 1, 4, 7, and 10 were tested for elongation at break, solar radiation absorption coefficient, solar reflectance, and hemispherical emissivity according to “Determination of visible light transmittance, direct solar transmittance, total solar energy transmittance, ultraviolet transmittance and related window glass parameters of architectural glass” GB / T2680-2021 and “Architectural Reflective Thermal Insulation Coatings” JG / T 235-2014. The test results are shown in Table 6.

[0101] Table 6

[0102] Test items Example 1 Example 4 Example 7 Example 10 color transparent Silver Gray White Light yellow Elongation at break 460％ 420％ 210％ 220％ Solar radiation absorption coefficient 0.11 0.12 0.14 0.14 Solar reflectance 50％ 90％ 88％ 88％ Hemispherical emissivity 0.86 0.91 0.88 0.87

[0103] The elongation at break of the high elastic water-based acrylic copolymer resin obtained in Example 1 was tested and found to be 820%.

[0104] The transparent highly elastic water-based acrylic nano reflective heat-insulating coatings prepared in Examples 1-3 can be applied to the reflective heat insulation of window glass, which can not only maintain a certain lighting rate but also reduce the transmission of sunlight. It can also be used as a transparent waterproof heat-insulating coating for exterior walls.

[0105] The silver-gray highly elastic water-based acrylic nano-reflective thermal insulation coating prepared in Examples 4 to 6 can be applied to reflective thermal insulation of roofs, exterior walls, steel structures and ceilings that are under severe vibration. It has a metallic texture and high sunlight reflectivity, and is resistant to vibration, aging, heat and cold.

[0106] The white highly elastic water-based acrylic nano reflective heat-insulating coating prepared in Examples 7 to 9 can be applied to reflective heat insulation of roofs and exterior walls. It has both high sunlight reflectivity and is resistant to rain erosion.

[0107] The colorful highly elastic water-based acrylic nano reflective heat-insulating coatings prepared in Examples 10 to 12 can be applied to reflective heat insulation of exterior walls and roofs. It has both high sunlight reflectivity and good decorative effect. For different application scenarios, the amount of highly elastic water-based acrylic nano reflective heat-insulating coating is shown in Table 7.

[0108] Table 7

[0109]

[0110] The present application also proposes a method for anti-corrosion and heat insulation treatment of a corroded high-speed railway steel structure platform, comprising:

[0111] S1. Use dry ice freezing technology to freeze and destroy the rust and damaged coating on the steel structure columns and frames of the high-speed railway steel structure platform, and then polish and remove the remaining rust and damaged coating on the steel structure columns and frames of the high-speed railway steel structure platform;

[0112] S2. Grind and remove the rust spots on the ceiling of the high-speed railway steel structure platform;

[0113] S3, apply rust conversion agent to the entire surface of the steel structure column and frame, and apply rust conversion agent to the rusted spots on the ceiling; convert the floating rust adhering to the steel structure column, frame surface and rusted parts of the ceiling into a corrosion-resistant conversion film, and wait for the conversion film to dry. The rust conversion agent is BXHT @ Rust remover;

[0114] S4. Apply water-based epoxy anti-corrosion primer to the entire surface of the steel structure column, frame surface and ceiling;

[0115] S5. Apply the high elasticity water-based acrylic nano reflective heat-insulating coating prepared in Example 4 on the surface of the dried water-based epoxy anticorrosive primer.

[0116] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A highly elastic water-based acrylic nano reflective thermal insulation coating, characterized in that: The raw materials include by weight percentage: The raw materials of the high elastic water-based acrylic copolymer resin include, by weight percentage:

2. The highly elastic water-based acrylic nano-reflective thermal insulation coating according to claim 1, characterized in that: The raw materials include by weight percentage: or or 3. The highly elastic water-based acrylic nano-reflective thermal insulation coating according to claim 1, characterized in that: The anionic emulsifier is polyoxyethylene ether ammonium sulfate.

4. The highly elastic water-based acrylic nano-reflective thermal insulation coating according to claim 1, characterized in that: The nonionic emulsifier is fatty alcohol polyoxyethylene ether.

5. The highly elastic water-based acrylic nano reflective thermal insulation coating according to claim 1, characterized in that: The peroxide initiator is ammonium persulfate or potassium persulfate.

6. The highly elastic water-based acrylic nano-reflective thermal insulation coating according to claim 1, characterized in that: The preparation method of the highly elastic water-based acrylic copolymer resin comprises: Step 1, weigh the raw materials according to the formula; Step 2, dissolving the peroxide initiator in deionized water to prepare a 10 wt % initiator solution; Step 3, dissolving anionic emulsifier and nonionic emulsifier in deionized water to prepare a 5wt% emulsifier solution, wherein the mass ratio of anionic emulsifier to nonionic emulsifier in the emulsifier solution is 2:1, retaining a portion of the emulsifier solution, and adding ethylhexyl acrylate, acrylic acid monomer, and methyl methacrylate monomer into the remaining emulsifier solution to disperse, to obtain a monomer emulsion; Step 4: Add the retained emulsifier solution into the reaction container, heat it to 80°C-90°C, add part of the initiator solution and part of the monomer emulsion into the reaction container and stir evenly, then gradually drop the remaining monomer emulsion and the remaining initiator solution into the reaction container, stir and react at about 80°C-90°C for about 4-5h, then heat it to 90°C-100°C, continue to react for 1-2h under vacuum conditions, then cool it to 40°C-50°C, add a film-forming aid, stir evenly, and obtain a highly elastic water-based acrylic copolymer resin.

7. A method for preparing the highly elastic water-based acrylic nano-reflective thermal insulation coating according to any one of claims 1 to 6, characterized in that: include: STEP1, weigh the raw materials according to the formula; STEP 2, add the dispersant to part of the water and stir evenly to obtain a dispersant aqueous solution; STEP 3, add nano titanium dioxide to the dispersant aqueous solution, stir evenly, then add aqueous silver paste, continue stirring and mixing evenly to obtain a mixed solution; STEP4. Add the highly elastic water-based acrylic copolymer resin to the mixed solution obtained in STEP3, add the remaining water and defoamer, stir evenly, and obtain a highly elastic water-based acrylic nano reflective thermal insulation coating.

8. A method for anti-corrosion and heat insulation treatment of a corroded high-speed railway steel structure platform, characterized in that: include: S1. Use dry ice freezing technology to freeze and destroy the rust and damaged coating on the steel structure columns and frames of the high-speed railway steel structure platform, and then polish and remove the remaining rust and damaged coating on the steel structure columns and frames of the high-speed railway steel structure platform; S2. Grind and remove the rust spots on the ceiling of the high-speed railway steel structure platform; S3, applying a rust conversion agent to the entire surface of the steel structure column and the frame, and applying a rust conversion agent to the rusted spots on the ceiling; converting the floating rust adhering to the steel structure column, the frame surface and the rusted parts of the ceiling into a corrosion-resistant conversion film, and waiting for the conversion film to dry; S4. Apply water-based epoxy anti-corrosion primer to the entire surface of the steel structure column, frame surface and ceiling; S5. Apply the highly elastic water-based acrylic nano-reflective thermal insulation coating as described in any one of claims 1 to 6 on the surface of the dried water-based epoxy anti-corrosion primer.

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