Phosphate-based high-temperature-resistant anti-corrosion paint and preparation method thereof

An anti-corrosion coating and phosphate technology, applied in anti-corrosion coatings, coatings, etc., can solve problems such as economic loss, oxidation, and surface corrosion of incinerators, and achieve the effect of prolonging the service life

Inactive Publication Date: 2012-04-18
中昊北方涂料工业研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the incinerator incinerates plastics, such as polytetrafluoroethylene, polyvinyl chloride, polyvinylidene chloride, etc., it can produce halides and hydrogen halide gases, all of which are highly corrosive and will cause damage to the combustion zone. Corrosion and oxidation on the surface of the incinerator
[0003] In this harsh environment, metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 240.0g of phosphoric acid into the reactor, add 40.0g of magnesia several times in batches, and react to obtain phosphate. The reaction temperature is between 20°C and 50°C. Add 20.0g of chromium trioxide, 1.0 G potassium molybdate, 250g water were stirred to obtain a clear and transparent phosphate base material; in addition, 250g ultrafine chrome green, 4.0g boric acid, 5.0g sodium hexametaphosphate, 3.0g chromium nitrate, 300g water were mixed and ground for 3 hours Finally, the fineness of the color paste is measured to be less than 4 microns; after mixing the phosphate base material and the color paste, stir and disperse, and the stirring speed is 800 to 1000 revolutions per minute. After dispersing for 4 hours, use a 300-mesh nylon mesh to filter to obtain a phosphate-based high-temperature resistant and anti-corrosion coating.

[0034] The coating is resistant to 900°C and 1000 hours without cracking or peeling off. Neutral salt spray test for 2000 hours The...

Embodiment 2

[0036] Add 250.0g of phosphoric acid into the reactor, add 50.0g of aluminum oxide in batches and several times, the reaction temperature is between 50°C and 102°C, and react to obtain phosphate, add 18.0g of chromium trioxide to the above-mentioned phosphate, 3.0 G molybdic acid, 250g water were stirred to obtain a clear and transparent phosphate base material; in addition, 255g ultrafine chrome green, 5.0g boric acid, 2.0g sodium hexametaphosphate, 3.0g chromium nitrate, 320g water were mixed and ground, and after grinding for 2 hours The fineness of the color paste is measured to be less than 4 microns; after mixing the phosphate base material and the color paste, stir and disperse at a stirring speed of 800 to 1000 revolutions per minute. After dispersing for 4 hours, use a 300-mesh nylon mesh to filter to obtain a phosphate-based high-temperature resistant and anti-corrosion coating.

[0037] The coating is resistant to 900°C and 1200 hours without cracking or peeling off...

Embodiment 3

[0039] Add 230.0g of phosphoric acid into the reactor, add 60.0g of aluminum hydroxide and 8.0g of aluminum oxide in batches in small amounts, the reaction temperature is between 50°C and 102°C, and the reaction will give phosphate. Add 18.0g of aluminum hydroxide to the above phosphate g chromium trioxide, 2.0g potassium dichromate, and 220g water were stirred to obtain a clear and transparent phosphate base material; in addition, 240g ultrafine chrome green, 5.0g boric acid, 4.0g sodium hexametaphosphate, 1.0g chromium nitrate, 2.0g Chromium phosphate, 1.0g of chromium sulfate, and 350g of water are mixed and ground. After grinding for 2 hours, the fineness of the color paste is less than 4 microns; after mixing the phosphate base and color paste, stir and disperse at a stirring speed of 800 to 1000 rpm. After dispersing for 4 hours, use a 300-mesh nylon mesh to filter to obtain a phosphate-based high-temperature resistant and anti-corrosion coating.

[0040] The coating is ...

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Abstract

The invention discloses a phosphate-based high-temperature-resistant anti-corrosion paint and a preparation method thereof. The paint is composed of phosphate, ultra-fine chrome green, boric acid, water, a passivator, a surfactant, and chromic salt. The phosphate is obtained through a reaction of phosphoric acid and a metal oxide containing magnesium, aluminum and zinc, or a reaction of phosphoric acid and a metal hydroxide. The paint provided by the invention is especially suitable to be applied in corrosion protection of metal or alloy under high temperatures and severe environments. The paint is used for protecting engines, exhaust pipes, incinerators, and the like. With the paint, the service lives of equipments can be prolonged.

Description

technical field [0001] The invention relates to the development of a phosphate-based high-temperature resistant and anti-corrosion paint. It is mainly used for high temperature resistance and corrosion protection of aircraft engines, automobile engines, gas turbines, and related components of incinerator combustion chambers. Background technique [0002] With the rapid development of industrial technology, the requirements for the power system are increasing day by day. The power system emits a lot of heat and smoke when it is working, especially when the engine is working, it will produce carbon dioxide, water vapor, acid gas, hydrogen chloride, and a series of nitrogen-containing Oxides and sulfur oxides, the engine combustion chamber and exhaust system are exposed to high temperature, high humidity and corrosive chemical media. In addition, when the incinerator incinerates plastics, such as polytetrafluoroethylene, polyvinyl chloride, polyvinylidene chloride, etc., i...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/08C09D7/12
Inventor 王志强王亚文胡进奔孟军锋王国炜杨康孙哲
Owner 中昊北方涂料工业研究设计院有限公司
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