CN110819140A - Thick-coating single-component inorganic high-temperature-resistant anticorrosive coating for new energy electric vehicle - Google Patents
Thick-coating single-component inorganic high-temperature-resistant anticorrosive coating for new energy electric vehicle Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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Abstract
The thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new-energy electric automobile mainly comprises water-soluble silicate, antirust filler, metal zinc powder, high-temperature-resistant filler, fiber, a silane coupling agent, deionized water and the like. The silane coupling agent can modify the surface of the filler, so that the interaction among different particles is enhanced; the filler with large particle size is introduced, the filler with excellent high-temperature resistance such as low-melting-point glass frit is used as an auxiliary material, and various fibers are added to improve the tensile strength of the coating, so that the cracking resistance of the coating at higher thickness and higher temperature is effectively ensured. The invention aims at the problems of high ignition speed and high flame temperature of a power battery for a new energy electric vehicle, and solves the problems of temperature difference resistance, small construction thickness, poor connection strength and the like of the conventional protective coating. After the coating is subjected to a high-temperature test at 2h/1000 ℃, the surface of the coating does not crack or fall off; after 2000h salt spray test, the coating surface is free of rust, bubbling and cracking, and has excellent comprehensive performance and wide application prospect.
Description
Technical Field
The invention relates to the field of chemical materials, in particular to a thick-coating single-component inorganic high-temperature-resistant anticorrosive coating for a new energy electric vehicle and a preparation method thereof.
Background
With the development of science and technology, new energy automobiles gradually enter the market, enter common people and even possibly replace the traditional fuel automobiles in the existing market in the near future. However, the line of the power battery in the new energy automobile is aged, short-circuited, and heat accumulation during charging and discharging can cause battery combustion and even explosion, and fire accidents related to pure electric buses and hybrid buses are reported frequently. Because the new energy electric automobile power battery has high ignition and combustion speed, the temperature can reach 1000 ℃, and is far higher than the combustion temperature (500 ℃) of gasoline after ignition, the high-temperature protection is adopted for the area near the new energy electric automobile battery, the battery combustion speed can be effectively reduced, and valuable time is provided for fire fighting and personnel evacuation.
The high-temperature resistant coating is also called as a heat-resistant coating, and generally refers to a functional coating which has no phenomena of cracking, peeling, falling off and the like on the surface of a paint film at the environmental temperature of more than 200 ℃, can still keep good physical and mechanical properties and enables a protected substrate to normally work. According to the difference of film-forming materials, the paint is divided into organic high-temperature resistant paint and inorganic high-temperature resistant paint. The main film forming substance of the inorganic water-based high-temperature resistant coating is an inorganic substance, and compared with an organic coating, the inorganic water-based high-temperature resistant coating has the characteristics of environmental friendliness, no pollution, high hardness, good high-temperature resistance and the like. The base materials used in the current inorganic high temperature resistant paint mainly comprise ethyl silicate, silica sol and phosphate, and in order to enhance the corrosion resistance of the paint, zinc powder, zinc oxide and other pigments and fillers are often added. The water-soluble silicate, also called water glass, is a heat-resistant coating prepared by taking a silicate aqueous solution as a base material, and has high temperature resistance and wide application. Patent CN 107523106A discloses a high-modulus water-based zinc-rich high-temperature-resistant anticorrosive paint and a preparation method thereof, which is prepared by compounding high-purity zinc powder, flake zinc-aluminum-based amorphous alloy ultrafine powder and an aluminum silicate adhesive. Through detection, the high-modulus water-based zinc-rich high-temperature-resistant anticorrosive paint coating is intact after being subjected to 800 ℃ for 30 minutes, does not foam or rust after being subjected to salt spray for more than 3000 hours, and can be applied to the fields of large-scale steel structure buildings such as ships, containers, ocean platforms and the like. However, the coating of the invention is a two-component system, and the construction performance is more complex; the protection temperature is 800 ℃, and the protection requirement of the new energy electric automobile cannot be met; in addition, the coating can be constructed with a low thickness (less than or equal to 300 mu m), and when the thickness is too high, the coating is easy to crack at high temperature and loses high temperature resistance and corrosion resistance. Therefore, how to improve the protection temperature (not less than 1000 ℃) of the high-temperature resistant coating, improve the thick coating performance of the inorganic high-temperature resistant coating, ensure the high-temperature resistant and corrosion resistant performance of the coating in a thicker state is a current research hotspot, and have very wide market prospect.
Disclosure of Invention
The invention provides a thick-coating type single-component inorganic high-temperature-resistant anticorrosive coating for a new energy electric vehicle and a preparation method thereof, aiming at solving the problems of high ignition speed and high flame temperature of a power battery for the new energy electric vehicle at present and overcoming the defects of low protection temperature, small construction thickness and poor connection strength of the existing inorganic high-temperature-resistant coating. Firstly, the dispersibility of the filler and the connection strength of the coating are improved by adding a silane coupling agent into a coating system; secondly, the filler with large particle size is introduced into the coating system, the filler with excellent high temperature resistance such as low-melting-point glass frit is used as an auxiliary material, and various fibers are added to improve the cracking resistance of the coating and ensure the high temperature resistance and thick coating workability of the coating.
The technical scheme adopted by the invention for solving the defects of the technical problems is as follows: a thick-coatable single-component inorganic high-temperature-resistant anticorrosive paint is a single-component paint. The coating system comprises, by weight, 20-30 parts of water-soluble inorganic silicate, 20-30 parts of antirust filler, 10-15 parts of high-temperature-resistant filler, 10-20 parts of fiber, 2-3 parts of silane coupling agent, 3-5 parts of organic accelerator, 1-2 parts of anti-settling agent and 10-20 parts of deionized water.
A preparation method of a thick-coating inorganic high-temperature-resistant anticorrosive paint for a new energy electric vehicle comprises the following steps.
(1) Weighing 20-30 parts of water-soluble inorganic silicate by weight, placing the weighed water-soluble inorganic silicate into a dispersion tank, adding 10-15 parts of high-temperature-resistant filler, 10-20 parts of fiber and 2-3 parts of silane coupling agent, and performing high-speed dispersion at the rotating speed of 1000-1500 r/min.
(2) After a period of dispersion, 1-2 parts of anti-settling agent is added into the dispersion tank to adjust the viscosity of the coating, and high-speed dispersion is continued for a period of time at the rotating speed of 1000-1500 r/min.
(3) Weighing 20-30 parts of antirust filler and 5-10 parts of deionized water, placing the materials in a dispersion tank, dispersing the materials at a high speed at a rotating speed of 1500-2000r/min to ensure that the fineness of the coating is less than or equal to 80 mu m, adding 5-10 parts of deionized water to adjust the final viscosity, finally adding 3-5 parts of organic promoter, and dispersing the materials for a period of time to obtain the inorganic high-temperature-resistant anticorrosive coating for the new energy electric vehicle.
The water-soluble inorganic silicate is one or more of lithium silicate, potassium silicate and sodium silicate.
The antirust filler is one or more of zinc powder, zinc oxide, iron oxide red and mica powder.
The high-temperature resistant filler is one or more of alumina, hollow ceramic microspheres, asbestos powder and low-melting-point glass frit.
The fiber is one or more of polypropylene fiber, glass fiber and wood fiber.
The organic promoter is one or more of methanol, ethanol, glycol and glycerol.
The anti-settling agent is one or more of fumed silica, lithium magnesium silicate and modified urea solution.
The invention provides a thick-coating type single-component inorganic high-temperature-resistant anticorrosive coating for a new energy electric vehicle and a preparation method thereof, wherein a silane coupling agent is added into a coating system, so that the surface of a filler can be modified, the interaction among different particles is enhanced, and in addition, the silane coupling agent can also form a hydrogen bond with the surface of a base material, so that the dispersibility of the filler is improved, and the connection strength of a coating is enhanced; the filler with large particle size is introduced into the coating system, the filler with excellent high-temperature resistance such as low-melting-point glass frit is added, and various fibers are added to improve the tensile strength of the coating, so that the cracking resistance and the corrosion resistance of the coating at larger thickness and higher temperature are effectively prevented, and the high-temperature resistance and the thick coating workability of the coating are ensured.
Drawings
FIG. 1 is a surface test chart after 2 hours at 1000 ℃ of the inorganic high-temperature-resistant anticorrosive paint.
FIG. 2 is a test chart after 2000h of salt spray coating of the inorganic high-temperature-resistant anticorrosive paint.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Example 1.
The thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new-energy electric automobile comprises, by weight, 20 parts of water-soluble inorganic lithium silicate, 20 parts of metal zinc powder, 10 parts of iron oxide red, 10 parts of aluminum oxide, 5 parts of low-melting-point glass frit, 15 parts of glass fiber, 2 parts of silane coupling agent, 3 parts of ethanol, 1 part of fumed silica and 14 parts of deionized water.
The preparation method comprises the following steps.
(1) Weighing 20 parts of water-soluble inorganic lithium silicate by weight, placing the weighed materials into a dispersion tank, adding 10 parts of alumina, 5 parts of low-melting-point glass frit, 15 parts of glass fiber and 2 parts of silane coupling agent, and dispersing at a high speed of 1000-1500 r/min.
(2) After a period of dispersion, 1 part of fumed silica is added into the dispersion tank to adjust the viscosity of the coating, and high-speed dispersion is continued for a period of time at the rotating speed of 1000-1500 r/min.
(3) Weighing 20 parts of zinc powder, 10 parts of iron oxide red and 8 parts of deionized water in a dispersion tank, dispersing at a high speed at the rotating speed of 1500-2000r/min to ensure that the fineness of the coating is less than or equal to 80 mu m, adding 6 parts of deionized water to adjust the final viscosity, finally adding 3 parts of ethanol, and dispersing for a period of time to obtain the inorganic high-temperature-resistant anticorrosive coating for the new-energy electric vehicle.
Example 2.
The thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new-energy electric automobile comprises, by weight, 20 parts of water-soluble inorganic lithium silicate, 10 parts of water-soluble inorganic potassium silicate, 15 parts of metal zinc powder, 10 parts of mica powder, 10 parts of alumina, 5 parts of low-melting-point glass frit, 10 parts of glass fiber, 2 parts of silane coupling agent, 3 parts of ethanol, 1 part of fumed silica and 14 parts of deionized water.
The preparation method comprises the following steps.
(1) Weighing 20 parts of water-soluble inorganic lithium silicate and 10 parts of water-soluble inorganic potassium silicate in parts by weight, placing the materials into a dispersion tank, adding 10 parts of alumina, 10 parts of low-melting-point glass material, 15 parts of glass fiber and 2 parts of silane coupling agent, and carrying out high-speed dispersion at the rotating speed of 1000-1500 r/min.
(2) After a period of dispersion, 1 part of fumed silica is added into the dispersion tank to adjust the viscosity of the coating, and high-speed dispersion is continued for a period of time at the rotating speed of 1000-1500 r/min.
(3) Weighing 15 parts of zinc powder, 10 parts of mica powder and 8 parts of deionized water in a dispersion tank, dispersing at a high speed at the rotating speed of 1500-2000r/min to ensure that the fineness of the coating is less than or equal to 80 mu m, adding 6 parts of deionized water to adjust the final viscosity, finally adding 3 parts of ethylene glycol, and dispersing for a period of time to obtain the inorganic high-temperature-resistant anticorrosive coating for the new-energy electric automobile.
Example 3.
The thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new-energy electric automobile comprises, by weight, 10 parts of water-soluble inorganic lithium silicate, 10 parts of water-soluble inorganic potassium silicate, 30 parts of metal zinc powder, 5 parts of alumina, 10 parts of low-melting-point glass frit, 15 parts of glass fiber, 3 parts of silane coupling agent, 5 parts of glycerol, 1 part of modified urea solution and 11 parts of deionized water.
The preparation method comprises the following steps.
(1) Weighing 10 parts of water-soluble inorganic lithium silicate and 10 parts of water-soluble inorganic potassium silicate in parts by weight, placing the materials in a dispersion tank, adding 5 parts of alumina, 10 parts of low-melting-point glass material, 15 parts of glass fiber and 3 parts of silane coupling agent, and carrying out high-speed dispersion at the rotating speed of 1000-1500 r/min.
(2) After a period of dispersion, 1 part of modified urea solution is added into the dispersion tank to adjust the viscosity of the coating, and high-speed dispersion is continued for a period of time at the rotating speed of 1000-1500 r/min.
(3) Weighing 30 parts of zinc powder and 5 parts of deionized water in a dispersion tank, dispersing at a high speed at the rotating speed of 1500-2000r/min to ensure that the fineness of the coating is less than or equal to 80 mu m, adding 6 parts of deionized water to adjust the final viscosity, finally adding 5 parts of glycerol, and dispersing for a period of time to obtain the inorganic high-temperature-resistant anticorrosive coating for the new energy electric automobile.
And (5) testing results.
(1) The prepared single-component inorganic high-temperature-resistant anticorrosive paint is subjected to high-temperature resistance test. The inorganic high-temperature-resistant anticorrosive paint prepared in the example 1 is blade-coated on a sand-blasting steel plate, the thickness of a paint film is 1mm, the paint film is placed in a muffle furnace until the temperature is 1000 ℃, and the surface condition of a sample plate is observed after 2 hours. As shown in figure 1, the coating is perfect, and the surface has no cracking or shedding phenomenon.
(2) The prepared single-component inorganic high-temperature-resistant anticorrosive paint is subjected to anticorrosive performance test. The inorganic high-temperature-resistant anticorrosive paint prepared in the example 1 is blade-coated on a sand-blasting steel plate, the thickness of a paint film is 1mm, the paint film is placed in a salt spray test box, and the corrosion condition of the surface of a sample plate is regularly observed. As shown in FIG. 2, after 2000h, the coating surface did not rust, blister or crack.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new energy electric vehicle is characterized by being a single-component paint, and the paint system comprises, by weight, 20-30 parts of water-soluble inorganic silicate, 20-30 parts of antirust filler, 10-15 parts of high-temperature-resistant filler, 10-20 parts of fiber, 2-3 parts of silane coupling agent, 3-5 parts of organic accelerator, 1-2 parts of anti-settling agent and 10-20 parts of deionized water.
2. The preparation method of the thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new energy electric vehicle as claimed in claim 1, characterized by comprising the following steps:
(1) weighing 20-30 parts of water-soluble inorganic silicate by weight, placing the weighed water-soluble inorganic silicate into a dispersion tank, adding 10-15 parts of high-temperature-resistant filler, 10-20 parts of fiber and 2-3 parts of silane coupling agent, and dispersing at a high speed at a rotating speed of 1000-1500 r/min;
(2) after dispersing for a period of time, adding 1-2 parts of anti-settling agent into the dispersion tank to adjust the viscosity of the coating, and continuing dispersing at high speed for a period of time at the rotating speed of 1000-1500 r/min;
(3) weighing 20-30 parts of antirust filler and 5-10 parts of deionized water, placing the materials in a dispersion tank, dispersing the materials at a high speed at a rotating speed of 1500-2000r/min to ensure that the fineness of the coating is less than or equal to 80 mu m, adding 5-10 parts of deionized water to adjust the final viscosity, finally adding 3-5 parts of organic promoter, and dispersing the materials for a period of time to obtain the inorganic high-temperature-resistant anticorrosive coating.
3. The preparation method of the thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new energy electric vehicle as claimed in claim 2, wherein the water-soluble inorganic silicate is one or more of lithium silicate, potassium silicate and sodium silicate.
4. The preparation method of the thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new energy electric vehicle as claimed in claim 2, wherein the antirust filler is one or more of zinc powder, zinc oxide, iron oxide red and mica powder.
5. The preparation method of the thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new energy electric vehicle as claimed in claim 2, wherein the high-temperature-resistant filler is one or more of alumina, hollow ceramic microspheres, asbestos powder and low-melting-point glass frit.
6. The preparation method of the thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new-energy electric vehicle as claimed in claim 2, wherein the fiber is one or more of polypropylene fiber, glass fiber and wood fiber.
7. The preparation method of the thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new energy electric vehicle as claimed in claim 2, wherein the organic accelerator is one or more of methanol, ethanol, ethylene glycol and glycerol.
8. The preparation method of the thick-coating type single-component inorganic high-temperature-resistant anticorrosive paint for the new energy electric vehicle as claimed in claim 2, wherein the anti-settling agent is one or more of fumed silica, lithium magnesium silicate and modified urea solution.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112029322A (en) * | 2020-09-08 | 2020-12-04 | 吴征 | Heat insulation coating for spraying on surface of Q235B steel under high-temperature condition and use method thereof |
| CN113402906A (en) * | 2021-06-11 | 2021-09-17 | 厦门双瑞船舶涂料有限公司 | Thick-film anti-cracking inorganic zinc silicate antirust paint and preparation method thereof |
| CN116496077A (en) * | 2023-06-27 | 2023-07-28 | 山东潍耐节能材料有限公司 | Refractory material and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112029322A (en) * | 2020-09-08 | 2020-12-04 | 吴征 | Heat insulation coating for spraying on surface of Q235B steel under high-temperature condition and use method thereof |
| CN113402906A (en) * | 2021-06-11 | 2021-09-17 | 厦门双瑞船舶涂料有限公司 | Thick-film anti-cracking inorganic zinc silicate antirust paint and preparation method thereof |
| CN116496077A (en) * | 2023-06-27 | 2023-07-28 | 山东潍耐节能材料有限公司 | Refractory material and preparation method thereof |
| CN116496077B (en) * | 2023-06-27 | 2023-08-29 | 山东潍耐节能材料有限公司 | Refractory material and preparation method thereof |
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