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CN-120888235-B - Inorganic resin coating, preparation process and application thereof in electrogalvanized steel plate

CN120888235BCN 120888235 BCN120888235 BCN 120888235BCN-120888235-B

Abstract

The invention relates to the technical field of surface corrosion prevention of galvanized layers, in particular to an inorganic resin coating, a preparation process and application thereof in electrogalvanized steel plates. The inorganic resin coating comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 100 (10-40), the component A is mainly prepared from epoxy silane, methyltrimethoxysilane, phenyltriethoxysilane, C1-2 alcohol, deionized water and a pH value regulator, the mass ratio of the C1-2 alcohol to the deionized water is 70-80 (20-30), the sum of the mass ratio of the C1-2 alcohol to the deionized water accounts for 80-96wt% of the component A, and the component B is titanium silicon compound sol which is mainly a hydrolysis copolymer formed by titanate and silicate. The inorganic coating formed by the invention has good compactness and strong film adhesion, and can play an excellent anti-corrosion reinforcing effect.

Inventors

  • HUANG SHAOXING
  • Hong Zhuhuan
  • CUI XIN
  • TANG YONG

Assignees

  • 广东斗原精密技术有限公司

Dates

Publication Date
20260508
Application Date
20250814

Claims (7)

  1. 1. The inorganic resin coating is characterized by comprising an A component, a B component and a C component, wherein the mass ratio of the C component to the A component to the B component is (1-10): 100 (10-40); The component A is prepared from epoxy silane, a cross-linking agent, methacryloxy silane, mercapto silane, a water-soluble photoinitiator, C1-2 alcohol, deionized water and a pH value regulator, wherein the cross-linking agent comprises at least one of methyltrimethoxy silane, dimethyl dimethoxy silane, phenyl triethoxy silane, methylphenyl diethoxy silane and phenyl diethoxy silane; The C1-2 alcohol is any one of methanol and ethanol; the pH value regulator is acetic acid or propionic acid; The mass ratio of the C1-2 alcohol to the deionized water is (70-80): 20-30; the sum of the mass of the C1-2 alcohol and the deionized water accounts for 80-96wt% of the component A; the mass ratio of the epoxy silane to the cross-linking agent is (4-8) (1-2); The ratio of the propylene double bond group contained in the methacryloxy silane to the mercapto group contained in the mercapto group-containing silane is 1 (1-1.2), and the total mass of the methacryloxy silane and the mercapto group-containing silane accounts for 0.2-2wt% of the total mass of the component A; the component B is titanium silicon compound sol which is mainly hydrolysis copolymer formed by titanate and silicate; The component C comprises copper sulfate, surface carboxylation modified nano inorganic filler and deionized water, wherein the surface carboxylation modified nano inorganic filler is one or a combination of more of carboxylation modified graphene, carboxylation modified carbon nanotubes, carboxylation modified halloysite nanotubes, carboxylation modified boron nitride nanosheets and carboxylation modified molybdenum disulfide nanosheets.
  2. 2. The inorganic resin coating according to claim 1, wherein the titanate is at least one of tetraethyl titanate and tetra-n-butyl titanate, and the silicate is at least one of methyl silicate, ethyl silicate, propyl silicate and butyl silicate.
  3. 3. An inorganic resin coating according to claim 1, wherein the epoxysilane is at least one of 3-glycidoxypropyl trimethoxysilane, 3-glycidoxypropyl triethoxysilane, 2- (3, 4-epoxycyclohexane) ethyl triethoxysilane, 3-glycidoxypropyl (dimethoxy) methylsilane, 2- (3, 4-epoxycyclohexyl) ethyl trimethoxysilane.
  4. 4. The inorganic resin coating according to claim 1, wherein the methacryloxy silane is at least one of 3- (methacryloxy) propyl trimethoxy silane, 3-methacryloxy propyl methyl dimethoxy silane, 3-trimethoxy silane propyl acrylate, 3-acryloxy propyl methyl dimethoxy silane, and the mercapto silane is at least one of mercapto propyl trimethoxy silane and mercapto propyl triethoxy silane.
  5. 5. The inorganic resin coating according to claim 1, wherein the water-soluble photoinitiator is at least one of a photoinitiator 2959, a photoinitiator 8700, and a photoinitiator 6992.
  6. 6. A process for producing an inorganic resin coating material according to any one of claims 1 to 5, comprising the steps of: The preparation of the component A comprises the steps of uniformly mixing epoxy silane, methacryloxy silane, mercapto silane, a cross-linking agent, C1-2 alcohol and deionized water, then adding a pH value regulator, regulating the pH value of a system to be 3-4, and hydrolyzing for 4-24 hours at 30-50 ℃ to obtain the component A; The preparation of the component B, namely, after ethanol, deionized water, titanate and silicate are uniformly mixed, hydrolyzing for 0.5-2 hours to form a hydrolyzed copolymer to obtain the component B; the preparation of the component C, namely uniformly mixing water-soluble metal salt, nano inorganic filler modified by surface carboxylation and deionized water to form the component C; The component A, the component B and the component C are uniformly mixed according to the mass ratio of 100 (10-40) (1-10) to obtain the inorganic resin coating, when the inorganic resin coating is used, the water-soluble photoinitiator is added into the inorganic resin coating, the inorganic resin coating is uniformly mixed, and the curing condition of the inorganic resin coating is that the inorganic resin coating is cured for 30-60min under the irradiation of ultraviolet light at the temperature of 80-120 ℃.
  7. 7. Use of an inorganic resin coating according to any one of claims 1-5 for the surface preservation of galvanized steel sheets.

Description

Inorganic resin coating, preparation process and application thereof in electrogalvanized steel plate Technical Field The invention relates to the technical field of surface corrosion prevention of galvanized layers, in particular to an inorganic resin coating, a preparation process and application thereof in electrogalvanized steel plates. Background The metal corrosion brings economic loss, potential safety hazard, environmental pollution, resource waste and other problems ‌. Therefore, metal surface corrosion technology is one of the main means for solving the metal corrosion hazard. The galvanized corrosion prevention technology is used as one of steel surface corrosion technologies, can improve the corrosion resistance of steel, and is commonly used in environments requiring corrosion and rust prevention, such as construction, automobile manufacturing and other industrial fields. The galvanization corrosion prevention process is divided into a hot dip galvanization process and an electrogalvanizing process. The electrogalvanizing process has simple electrogalvanizing operation, higher zinc material utilization rate and thickness of the electrogalvanizing layer of 5-15 mu m. The thickness of the zinc layer of the hot dip galvanizing process is more than or equal to 30 mu m, the zinc layer is compact and has better covering performance, and the corrosion resistance of the hot dip galvanizing layer is better than that of the electrogalvanizing layer, but a large amount of zinc materials are consumed. The research of the zinc plating corrosion resistance mechanism is that the composition of the protective film on the surface of the zinc plating layer mainly comprises zinc oxide, zinc hydroxide, basic zinc carbonate and the like under the common atmospheric corrosion condition, so that the corrosion of the basic zinc can be slowed down, and a new protective film can be formed when the protective film is damaged. However, galvanized steel cannot be applied to scenes with high corrosion resistance, such as scenes in high temperature and high humidity for a long time, and severe environments such as seawater soaking scenes. In order to further improve the corrosion resistance of galvanized steel, the prior art has chromate passivated galvanized steel. However, chromate passivation generates a large amount of industrial three wastes which are harmful to the environment, has poor environmental protection performance, and has been gradually replaced by an inorganic protective film technology of forming a three-dimensional-Si-O-M crosslinked structure through organosilane dehydration condensation reaction. In the prior art, KH-560 silane is used as a main film forming substance to form an inorganic physical shielding layer on the surface of the galvanized sheet so as to improve the corrosion resistance of galvanized steel. However, the compactness deviation of a single silane film affects the corrosion resistance, and the requirement of high corrosion resistance of galvanized steel cannot be met better. Disclosure of Invention In order to solve the problem that the corrosion resistance of the formed inorganic coating cannot better meet the high corrosion resistance requirement of galvanized steel due to the compactness deviation of a single silane film, the invention provides an inorganic resin coating, a preparation process and application thereof in an electrogalvanized steel plate. The invention provides an inorganic resin coating, which is realized by the following technical scheme: The inorganic resin coating comprises an A component and a B component, wherein the mass ratio of the A component to the B component is 100 (10-40); The component A is mainly prepared from epoxy silane, a cross-linking agent, C1-2 alcohol, deionized water and a pH value regulator, wherein the cross-linking agent comprises at least one of methyltrimethoxysilane, dimethyldimethoxy silane, phenyltriethoxy silane, methylphenyl diethoxy silane and phenyldiethoxy silane; The C1-2 alcohol is any one of methanol and ethanol; the pH value regulator is acetic acid or propionic acid; The mass ratio of the C1-2 alcohol to the deionized water is (70-80): 20-30; the sum of the mass of the C1-2 alcohol and the deionized water accounts for 80-96wt% of the component A; The mass ratio of the epoxy silane to the methyltrimethoxy silane to the phenyltriethoxy silane is (4-8) (0.5-2); The component B is titanium silicon compound sol, and the titanium silicon compound sol is mainly a hydrolytic copolymer formed by titanate and silicate. The inorganic coating formed by the invention has good compactness and strong film adhesion, and can play an excellent anti-corrosion reinforcing effect, so that galvanized steel after being treated by the inorganic resin coating has excellent corrosion resistance. Preferably, the titanate is at least one of tetraethyl titanate, tetra-n-butyl titanate and tetra-isopropyl butyl titanate, and the silicate is at least one o