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Room-temperature self-curing inorganic phosphate anti-corrosion paint as well as preparing method and use method of paint

A technology of inorganic phosphates and anti-corrosion coatings, applied in anti-corrosion coatings, coatings and other directions, can solve the problem that the application has not been widely promoted, and achieve the effects of delaying curing time, saving costs and reducing construction difficulty

Active Publication Date: 2015-02-11
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some phosphate anti-corrosion coatings disclosed in the prior art must be baked at a relatively high temperature before they can be cured, resulting in their application not being widely promoted

Method used

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  • Room-temperature self-curing inorganic phosphate anti-corrosion paint as well as preparing method and use method of paint
  • Room-temperature self-curing inorganic phosphate anti-corrosion paint as well as preparing method and use method of paint

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preparation example Construction

[0097] The present invention also provides the preparation method of above-mentioned normal temperature self-curing inorganic phosphate anticorrosion coating, comprising the following steps:

[0098] mixing a metal compound with a phosphoric acid solution and heating to obtain a phosphate adhesive, the metal compound including metal oxide and / or metal hydroxide;

[0099] Mix the phosphate adhesive, pigments and fillers, functional additives and deionized water to obtain component A;

[0100] The basic metal oxide is coated with inorganic nanoparticles to obtain a curing agent, the curing agent has a core-shell structure, the shell in the core-shell structure is inorganic nanoparticles, and the core in the core-shell structure is alkaline metal oxide thing;

[0101] Mix the curing agent with pigments and fillers, industrial solid waste, functional additives and deionized water to obtain component B;

[0102] The A component and the B component are mixed to obtain a normal tem...

Embodiment 1

[0122] According to the ratio of Al:P molar ratio of 1.4:3, aluminum hydroxide powder was added to a phosphoric acid solution with a mass concentration of 50% and mixed, heated and stirred in an oil bath at 150°C, and reacted for 0.5 hours to obtain an aqueous solution of phosphate adhesive; Add 24 parts of titanium dioxide, 0.5 parts of phosphate chromium-free corrosion inhibitor, 0.5 parts of iron phosphate, and 15 parts of deionized water to 60 parts of phosphate adhesive aqueous solution, mix and stir for 15 minutes to obtain coating A component.

[0123] Magnesium oxide particles are coated with silica nanoparticles by sol-gel method:

[0124] Add 3g of MgO powder into the mixed solvent (100mL of ethanol + 30mL of deionized water + 2mL of ammonia water), and ultrasonically shake for 1h to fully disperse it to obtain the MgO dispersion;

[0125] Slowly add a mixture of 30 mL tetraethyl orthosilicate (TEOS) and 50 mL absolute ethanol dropwise to the MgO dispersion under mag...

Embodiment 2

[0134] According to the ratio of Al:P molar ratio of 1.0:3, aluminum hydroxide powder is added to a phosphoric acid solution with a mass concentration of 50% and mixed, heated and stirred in an oil bath at 180° C., and reacted for 1 hour to obtain an aqueous phosphate adhesive solution; Add 32 parts of iron oxide red, 1.5 parts of polyphosphate chromium-free corrosion inhibitor, 1.5 parts of iron phosphate and 15 parts of deionized water to 50 parts of phosphate adhesive aqueous solution, mix and stir for 15 minutes to obtain coating A component;

[0135] Zinc oxide particles were coated with silica nanoparticles by sol-gel method:

[0136] Take 3g of ZnO powder and add it to the mixed solvent (100mL ethanol + 30mL deionized water + 2mL ammonia water), and ultrasonically oscillate for 1h to fully disperse it to obtain a zinc oxide dispersion;

[0137] Slowly add a mixture of 30mL TEOS and 50mL absolute ethanol dropwise to the obtained zinc oxide dispersion under magnetic stirr...

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Abstract

The invention provides room-temperature self-curing inorganic phosphate anti-corrosion paint, which comprises an ingredient A and an ingredient B, wherein the ingredient A comprises phosphate adhesives, pigment filling materials, functional auxiliary agents and deionized water, wherein the adhesives are prepared from metal oxides and / or hydroxides and phosphoric acid through reaction; the ingredient B comprises curing agents, pigment filling materials, industrial solid waste, functional auxiliary agents and deionized water, the curing agents have core-shell structures, cores and shells in the core-shell structures are respectively inorganic nanometer particles and alkali metal oxides, and the mol ratio of the element P contained in the adhesives of the ingredient A to the alkali metal element M contained in the curing agents of the ingredient B is (2.0 to 4.0):1. The room-temperature self-curing inorganic phosphate anti-corrosion paint can be automatically cured at room temperature, the curing and film forming can be realized without high-temperature drying, meanwhile, the applicability time of the inorganic phosphate anti-corrosion paint is long, and the problem of coating and film forming incapability due to too fast curing in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion materials, in particular to a normal-temperature self-curing inorganic phosphate anti-corrosion coating and a preparation method and application method thereof. Background technique [0002] During the production and use of industries such as petrochemical, electric power production and transportation, and mechanical equipment, many equipment and pipelines have been exposed to severe conditions such as high temperature, high salt spray corrosion environment, and high wear for a long time, resulting in serious damage to related equipment. . The functional protective coating developed rapidly in recent years can effectively prevent the wear and oxidation of equipment at high temperatures, and has the advantages of convenient spraying, no volatile organic compounds generated during use, and no environmental pollution. [0003] At present, high-temperature resistant coatings with functional pr...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/08C09D7/12
Inventor 徐三强汪国庆王镜渊李江孟繁蓉汪培庆
Owner HAINAN UNIVERSITY
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