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A preparation method for composite anti-corrosion coating on inner wall of garbage incinerator

A waste incinerator and anti-corrosion technology, which is applied in the direction of coating, metal material coating process, liquid chemical plating, etc., can solve the problems of high price, achieve cost utilization, and improve the effect of chlorine corrosion resistance

Active Publication Date: 2021-06-29
JIANGXI SCI & TECH NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this product is expensive. In order to further improve its corrosion resistance and ensure the maximum utilization of capital costs, the present invention proposes Al 2 o 3 / ZrO 2 / Preparation method of Inconel625 composite anti-corrosion coating, in order to further improve its corrosion resistance

Method used

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  • A preparation method for composite anti-corrosion coating on inner wall of garbage incinerator
  • A preparation method for composite anti-corrosion coating on inner wall of garbage incinerator
  • A preparation method for composite anti-corrosion coating on inner wall of garbage incinerator

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Embodiment 1

[0027] First, sand the 20x20x1.2cm Q235 plate with 80#, 200#, 600# sandpaper, remove the surface oxide scale, clean it with ethanol, and dry it naturally.

[0028] Secondly, the Inconel625 wire is surfacing on the surface of the Q235 steel using the cold metal over-surfacing process. Cut the surfacing sample into 10x10x12mm small samples by wire cutting for spare.

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Abstract

The invention discloses an Al material applied to the inner wall of a garbage incinerator 2 o 3 / ZrO 2 / The preparation method of Inconel625 composite anti-corrosion coating, the present invention takes Inconel625 wire material, zirconium oxychloride, aluminum isopropoxide, acetylacetone, yttrium nitrate, isopropanol, dehydrated alcohol etc. as initial raw material, adopts cold metal transition Surfacing technology combined with sol-gel method to prepare Al on the surface of Q235 steel 2 o 3 / ZrO 2 / Inconel625 composite coating to improve the molten salt corrosion resistance of the base material. The analysis of XRD and SEM results shows that after this process, uniform, cracked, micron-thickness Al 2 o 3 / ZrO 2 / Inconel625 composite coating, after NaCl molten salt corrosion at 900 ° C for 24 hours, the corrosion kinetic data of the sample obtained by the weight loss method shows that compared with the single Inconel625 coating sample, Al 2 o 3 / ZrO 2 / Inconel625 composite coating significantly reduces the weight loss of the sample and improves the corrosion resistance of the base material in molten salt.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coating design for the inner wall of a garbage incinerator, and in particular to an Al alloy used in a garbage incinerator 2 O 3 / ZrO 2 Preparation method of / Inconel625 composite anti-corrosion coating. Background technique [0002] The problem of garbage disposal has become more and more serious. Reasonable disposal of garbage and recycling of resources is an imperative development trend. Waste incineration power generation, as an environmental protection, energy-saving and resource-recycling treatment process, has attracted much attention. Chlorine corrosion, sulfur corrosion and other phenomena on the inner walls of heat exchangers and other devices in waste incineration power generation equipment seriously affect the service life of the incinerator and the safety of working conditions. Inconel625 has good corrosion resistance, especially chlorine corrosion and pitting corrosion. It...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/12B23P15/00
CPCB23P15/00C23C18/1216C23C18/1241C23C18/1254
Inventor 白凌云向军淮陈土春江龙发
Owner JIANGXI SCI & TECH NORMAL UNIV
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