High-temperature resistant energy-saving coating for metal

An energy-saving coating and high-temperature-resistant technology, which is applied to coatings and devices for coating liquid on the surface, etc., can solve the problems of attenuation of radiation ability and affecting the service life of coatings, and achieve the effect of no attenuation of radiation ability and good thermal stability

Inactive Publication Date: 2005-02-23
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, SiC will oxidize and decompose under the long-term action of high-temperature heat load, which will attenuate its radiation ability and affect the service life of the coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of aluminum dihydrogen phosphate solution:

[0025] After mixing 12 grams of aluminum hydroxide with a particle size of 500 nanometers and 100 grams of water, add phosphoric acid with a weight concentration of 85%, and heat it to 75°C under stirring to make it react to form an aluminum dihydrogen phosphate solution until the solution is clear So far, its weight concentration is 55%.

[0026] Preparation of modified silicon carbide powder:

[0027] Add 1 gram of coupling agent-gamma aminopropyltriethoxysilane to 40 grams of silica sol solution with a weight content of 25%, and after stirring evenly, add 20 grams of carbonized Silicon powder, to disperse silicon carbide powder evenly. Then, the modified silicon carbide powder with good oxidation resistance and a surface coated with a silicon dioxide film is obtained by suction filtration and drying.

[0028] synthetic paint

[0029] Put 63 parts of alumina sol with a weight concentration of 4% and 24 parts...

Embodiment 2

[0032] Put 40 parts of alumina sol with a weight concentration of 4% and 30 parts of modified silica sol with a weight concentration of 25% into a stirrer, and add 10 parts of the above-mentioned aluminum dihydrogen phosphate solution and 1 part of absolute ethanol while stirring. and 9 parts of modified silicon carbide powder. After uniform stirring, a micron powder coating modified by nano powder is obtained.

[0033] The coating is mixed with water to prepare a coating with a viscosity of 25, which is used on the surface of heat-resistant steel. The method disclosed in the national standard GB4653-84 is used for detection. After a 500h over-temperature test, the coating has no pulverization, no cracks, No peeling, the normal total emissivity is 0.85-0.9.

Embodiment 3

[0035] Put 80 parts of alumina sol with a weight concentration of 4% and 40 parts of modified silica sol with a weight concentration of 25% into a stirrer, and add 2 parts of the above-mentioned aluminum dihydrogen phosphate solution and 1 part of absolute ethanol while stirring. And 15 parts of modified silicon carbide powder. After uniform stirring, a micron powder coating modified by nano powder is obtained.

[0036] Mix the paint with water to prepare a paint with a viscosity of 30, which is used on the surface of ordinary carbon steel. It is tested by the method disclosed in the national standard GB4653-84. After a 500h over-temperature test, the coating has no pulverization, no cracks, No peeling, the normal total emissivity is 0.85-0.9.

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Abstract

Invention this disclose a kind of metal spend and able to bear the energy-conserving coating of high temperature. Invention this adopt organic silane unite pharmaceutical carborundum that surface retrofits as the coating host occasionally, adopt nanometer grade two oxidize silicon sol and alumina sol and high-temperature binder phosphoric acid two hydrogen aluminium, etc. compound one a new-type one as quickly as possible with able to bear high-temperature energy-conservation paint Material. The metal of this invention is used and able to bear the energy-conservation paint Material. The metal of this invention is used and able to bear the energy-conserving coating of high temperature, have quite high radiating rate within the range of very high temperature, have good hot stabilities, it is a kind of good high-temperature coating of metal, can be used in stainless steel, heat-resisting steel and ordinary steel and surface of the long time in high temperature, its radiation ability decay, the service life of the coating is longer by 10-20% than the routine one.

Description

technical field [0001] The invention relates to a coating, in particular to a ceramic coating for metal. Background technique [0002] As we all know, metals will undergo surface oxidation in high-temperature oxidizing atmospheres. Oxidation not only causes metal loss, but also depletes alloy elements in metals, affecting the quality and mechanical properties of metals. The use of metal high-temperature energy-saving ceramic coatings not only strengthens the radiation absorption heat performance, and the thermal efficiency increases significantly, but also protects the metal substrate from high-temperature oxidation and corrosion, effectively prolonging the service life of the equipment. At the same time, due to its simple construction process and low cost, it is increasingly widely used. [0003] SiC is one of the ceramic coating substrates widely used at present, such as the technology disclosed in the 87107902 patent, SiC has a relatively high emissivity in a very high t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14C09D1/00
Inventor 马刘宝黄志荣王学生
Owner EAST CHINA UNIV OF SCI & TECH
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