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Nanometer metal ceramic coating

A nano-cermet and nano-ceramic technology, applied in anti-corrosion coatings, anti-fouling/underwater coatings, coatings, etc., can solve the problem of not being able to effectively improve boiler heating uniformity, affecting equipment heat exchange efficiency, and low blackness of metal materials, etc. problems, to achieve enhanced wear resistance, improved thermal shock resistance, and improved self-lubricating properties

Inactive Publication Date: 2020-11-17
北京麦特斯普瑞防腐工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to solve the flue gas corrosion and ash powder abrasion of the four tubes of the boiler, the main technology adopted at present is thermal spraying metal coating, and the metal hot-melt spraying is applied on the surface of the equipment through professional equipment, but this technology has the following disadvantages. First, the coating It is not dense, and corrosive gases such as hydrogen sulfide in the flue gas have strong permeability, and can penetrate into the surface of the equipment through the gaps of the thermal sprayed metal coating to strongly corrode the equipment; The ash powder and the coke formed in it are easy to adhere, forming thick ash or coke, which affects the heat exchange efficiency of the equipment, and the long-term adhesion of the coke is easy to cause molten salt corrosion, which is the main reason for the equipment to burst ; Third, the blackness of metal materials is relatively low, which cannot effectively improve the heating uniformity of the boiler, and basically has no energy-saving effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A nano-cermet coating, composed of raw materials according to weight percentage: 5.35 parts of nano-silicon nitride, 10 parts of hexagonal boron nitride, 3.55 parts of nano-aluminum nitride, 0.73 parts of activated magnesium oxide, 5.2 parts of molybdenum modified zirconia, nano 3.7 parts of silicon carbide, 1.33 parts of cerium oxide, 4.2 parts of chromium oxide, 2 parts of molybdenum disulfide, 4.14 parts of nano-tungsten carbide, 3.72 parts of nickel powder, 1.58 parts of titanium powder, 3.7 parts of high temperature resistant emulsion, 36.1 parts of inorganic nano-modified adhesive 14.7 parts of water, of which 36.1 parts of inorganic nano-modified adhesives are prepared by reacting 12.6 parts of zirconium sol, 17.3 parts of silica sol, 4.5 parts of aluminum sol, and 1.7 parts of lithium hydroxide in a high-temperature reactor. The reaction temperature is 78 ℃.

Embodiment 2

[0017] A nano-cermet coating, composed of raw materials according to weight percentage: 5.5 parts of nano-silicon nitride, 10 parts of hexagonal boron nitride, 3.5 parts of nano-aluminum nitride, 1 part of activated magnesium oxide, 5 parts of molybdenum-modified zirconia, nano 5 parts of silicon carbide, 1 part of cerium oxide, 4.2 parts of chromium oxide, 2 parts of molybdenum disulfide, 4.5 parts of nano-tungsten carbide, 3.5 parts of nickel powder, 1.8 parts of titanium powder, 3.5 parts of high temperature resistant emulsion, 35 parts of inorganic nano-modified adhesive 14.5 parts of water, wherein the inorganic nano-modified adhesive is prepared by reacting 15 parts of zirconium sol and 20 parts of silica sol in a high-temperature reactor, and the reaction temperature is 75°C.

Embodiment 3

[0019] A nano-cermet coating, which is composed of raw materials according to weight percentage: 2 parts of nano-silicon nitride, 10 parts of hexagonal boron nitride, 5 parts of nano-aluminum nitride, 5 parts of activated magnesium oxide, 10 parts of molybdenum modified zirconia, nano 10 parts of silicon carbide, 1 part of cerium oxide, 5 parts of chromium oxide, 5 parts of molybdenum disulfide, 3 parts of nano-tungsten carbide, 5 parts of nickel powder, 2 parts of titanium powder, 5 parts of high temperature resistant emulsion, 20 parts of silica sol, 12 parts of water share.

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PUM

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Abstract

The invention provides a nanometer metal ceramic coating, belonging to the field of environment-friendly coatings. The nanometer metal ceramic coating is prepared from the following raw materials in parts by weight: 20-45 parts of a nanometer ceramic filler, 20-45 parts of a binder, 5-15 parts of nanometer metal powder and 10-20 parts of water. Compared with the prior art, the nanometer metal ceramic coating has excellent corrosion resistance, high blackness, good energy-saving effect, good surface self-lubricating effect, high contamination resistance, small possibility in falling and cracking, and no influence on heat transfer of four pipes of a boiler.

Description

technical field [0001] The invention relates to the field of environmental protection coatings, in particular to a nano-cermet coating. Background technique [0002] In order to solve the flue gas corrosion and ash powder abrasion of the four tubes of the boiler, the main technology adopted at present is thermal spraying metal coating, and the metal hot-melt spraying is applied on the surface of the equipment through professional equipment, but this technology has the following disadvantages. First, the coating It is not dense, and corrosive gases such as hydrogen sulfide in the flue gas have strong permeability, and can penetrate into the surface of the equipment through the gaps of the thermal sprayed metal coating to strongly corrode the equipment; The ash powder and the coke formed in it are easy to adhere, forming thick ash or coke, which affects the heat exchange efficiency of the equipment, and the long-term adhesion of the coke is easy to cause molten salt corrosion,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/10C09D7/61C09D5/16
CPCC09D1/00C09D5/10C09D5/1687Y02P20/10
Inventor 王广涛
Owner 北京麦特斯普瑞防腐工程有限公司
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