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High Density Tungsten Alloy Moisture and Heat Resistant Anticorrosion Coating

A high-density tungsten alloy and anti-corrosion coating technology, which is applied in the direction of anti-corrosion coatings, fire-proof coatings, polyurea/polyurethane coatings, etc., can solve problems such as corrosion, low anti-corrosion performance, and cannot meet the protection requirements of tungsten alloys for moisture and heat resistance. Effect of permeation diffusion and good shielding performance

Active Publication Date: 2019-04-16
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

However, due to the porous nature of the tungsten alloy material itself, there is electroplating residue in the base material after electroplating, which is easy to corrode in a hot and humid environment.
At the same time, the anti-corrosion effect of the coating on the micro-holes and the corners of tungsten alloy parts is poor, which also leads to the anti-corrosion performance of tungsten alloy galvanized / nickel materials is far lower than that of common steel galvanized / nickel materials
A variety of commonly used heavy-duty anti-corrosion coatings with excellent moisture and heat resistance were used for the coating of tungsten alloys, and their moisture and heat resistance was tested. After 48 hours, blisters appeared on the coating surface, and the tungsten alloys were corroded. Steel substrates have more than 500 hours of heat and humidity resistance, and existing coating products cannot meet the protection requirements of tungsten alloys for heat and humidity resistance

Method used

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  • High Density Tungsten Alloy Moisture and Heat Resistant Anticorrosion Coating
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  • High Density Tungsten Alloy Moisture and Heat Resistant Anticorrosion Coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of high-density tungsten alloy heat and humidity resistant anti-corrosion primer: Add 50kg of isopropanol and 32kg of demineralized water into the reaction kettle, add 0.4kg of acetic acid, and the pH value is about 5 after testing. Raise the temperature to 55°C±2°C, slowly add 2kg of heptadecylfluorodecyltriethoxysilane under stirring for 1 hour, and keep it at this temperature for 8 hours after the addition is completed, to prepare a high-density tungsten alloy resistant to heat and humidity Primer.

[0043] (2) Preparation of component A of high-density tungsten alloy heat and humidity resistant anti-corrosion finish: add 20kg of cyclohexanone and 5kg of methyl ethyl ketone into the reaction kettle, heat up to reflux state, add 25kg of epoxy resin 607 in three times, and reflux The state was kept warm for 2 hours to obtain an epoxy resin solution. Add 0.5kg of dispersant BYK-110, 0.15kg of leveling agent BYK-320, 8kg of cyclohexanone, 8kg of methyl e...

Embodiment 2

[0047] (1) Preparation of high-density tungsten alloy heat and humidity resistant anti-corrosion primer: Add 50kg of isopropanol and 40kg of demineralized water into the reaction kettle, add 0.45kg of acetic acid, and the pH value is about 5 after testing. Raise the temperature to 55°C±2°C, slowly add 2.5kg of heptadecylfluorodecyltriethoxysilane under stirring, and take 1 hour to slowly add 2.5kg of heptadecafluorodecyltriethoxysilane. After the addition is completed, keep it at this temperature for 8 hours to prepare a high-density tungsten alloy resistant to heat and humidity. Anti-corrosion primer.

[0048](2) Preparation of component A of high-density tungsten alloy heat and humidity resistant anti-corrosion finish paint: add 23kg of cyclohexanone and 2kg of butanone into the reaction kettle, heat up to reflux state, add 20kg of epoxy resin 607, 5kg in three times Epoxy resin 609 was prepared in a reflux state for 2 hours to obtain an epoxy resin solution. Add 0.4kg of d...

Embodiment 3

[0052] (1) Preparation of high-density tungsten alloy heat and humidity resistant anti-corrosion primer: Add 60kg of isopropanol and 36kg of demineralized water into the reaction kettle, add 0.5kg of acetic acid, and the pH value is about 5 after testing. Raise the temperature to 55°C±2°C, slowly add 2kg of tridecafluorooctyltriethoxysilane under stirring, and take 1 hour to slowly add 2kg of tridecafluorooctyltriethoxysilane. After the addition is completed, keep it at this temperature for 8 hours to prepare a high-density tungsten alloy resistant to heat and humidity. Primer.

[0053] (2) Preparation of component A of high-density tungsten alloy heat and humidity resistant anti-corrosion finish paint: add 20kg of cyclohexanone and 5kg of methyl ethyl ketone into the reaction kettle, heat up to reflux state, add 25kg of epoxy resin 609 in three times, and reflux The state was kept warm for 2 hours to obtain an epoxy resin solution. Add 0.6kg of dispersant BYK-110, 0.2kg of l...

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Abstract

The invention discloses high-density tungsten alloy heat and humidity resistant anticorrosive paint which is composed of priming paint and finishing coat, wherein the priming paint is composed of isopropanol, softened water, fluoroalkyl silane and acetic acid; the finishing coat is composed of a component A and a component B; the component A is composed of epoxy resins, lemon yellow, titanium dioxide, talcum powder, kaolin, mica powder, a dispersing agent, a flatting agent, a mixed solvent and the like; and the component B is composed of polyisocyanates, a mixed solvent and a catalyst. In the using process, the tungsten alloy is subjected to dip-coating treatment by using the priming paint and then coated by the finishing coat. The high-density tungsten alloy subjected to anticorrosive coating can meet the requirement of long-term heat and humidity resistance, so that the tungsten alloy can be used for a long time in a hot and humid environment.

Description

technical field [0001] The invention relates to the field of metal anticorrosion, in particular to a high-density tungsten alloy heat and humidity resistant anticorrosion coating. Background technique [0002] High-density tungsten alloy is a powder metallurgy material with high density, high strength, low expansion coefficient and other characteristics. Tungsten alloy materials have multiple uses in aerospace and military industries, and can be used to produce gyroscopes, submunitions, armor-piercing bombs, balance weight components on various instruments and engines, and shielding materials for nuclear reactors. [0003] Affected by powder metallurgy processing technology, high-density tungsten alloy is a kind of porous material, which is easily corroded in natural environment, especially in hot and humid environment. Studies have shown that the surface of tungsten alloy will be corroded in a hot and humid environment for 24 hours, resulting in black liquid, and the corro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/08C09D175/04C09D5/08C09D7/61C08G18/58
CPCC08G18/58C08K3/22C08K3/34C08K3/346C08K13/02C08K2003/2241C08K2201/014C09D5/08C09D5/18C09D7/61C09D175/04C09D183/08
Inventor 李志宝陈小庆宋欢欢侯继宗王学龙李超宇
Owner 中昊北方涂料工业研究设计院有限公司
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