A kind of surface anti-corrosion method of metal substrate

A metal substrate and coating technology, applied in metal material coating process, coating, melt spraying and other directions, can solve the problems of poor adhesion between the coating and the surface of the stainless steel substrate, large difference in thermal expansion coefficient, and spalling of spray coating. , to achieve the effect of improving high temperature oxidation resistance and corrosion resistance, excellent wear resistance, and reducing processing temperature

Active Publication Date: 2020-03-27
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coefficient of thermal expansion of the ceramic coating and stainless steel is quite different, and the adhesion between the coating and the surface of the stainless steel substrate is poor, and cracks are prone to occur, resulting in peeling off of the sprayed coating.

Method used

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  • A kind of surface anti-corrosion method of metal substrate
  • A kind of surface anti-corrosion method of metal substrate
  • A kind of surface anti-corrosion method of metal substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1) Decontamination, sand blasting and ultrasonic cleaning pretreatment on the surface of 304 stainless steel substrate

[0048] Decontamination: The 304 stainless steel substrate is ultrasonically cleaned with acetone, hydrochloric acid and deionized water for 5 minutes in sequence, and dried in an oven at 40°C for 30 minutes.

[0049] Sandblasting: Fix the 304 stainless steel substrate on the support platform, and use corundum sand with a particle size of 20 mesh for sandblasting. Adjust the air source pressure of the jet to 0.5MPa, adjust the power of the sandblasting machine to 2.5KW, keep the angle between the sandblasting gun mouth and the surface of the stainless steel substrate at 40 degrees, and keep the distance at 8cm.

[0050] Cleaning: The stainless steel substrate after sandblasting was ultrasonically cleaned with acetone, alcohol, and deionized water for 5 minutes in sequence, and dried in a 40°C oven for 30 minutes after the ultrasonic wave was completed....

Embodiment 2

[0058] (1) Decontamination, sand blasting and ultrasonic cleaning pretreatment on the surface of 304 stainless steel substrate

[0059] Decontamination: The 304 stainless steel substrate is ultrasonically cleaned with acetone, hydrochloric acid and deionized water for 8 minutes in sequence, and dried in an oven at 45°C for 40 minutes.

[0060] Sandblasting: Fix the 304 stainless steel substrate on the support platform, and use corundum sand with a particle size of 22 mesh for sandblasting. Adjust the air source of the jet to 0.7Mpa, adjust the power of the sandblasting machine to 3.6KW, keep the angle between the sandblasting muzzle and the surface of the stainless steel substrate at 45 degrees, and keep the distance at 10cm.

[0061] Cleaning: The substrate after sandblasting was ultrasonically cleaned with acetone, alcohol, and deionized water for 8 minutes in sequence, and then dried in an oven at 45°C for 40 minutes after ultrasonication was completed.

[0062] (2) Prepar...

Embodiment 3

[0069] (1) The surface of the 304 stainless steel substrate is pretreated by decontamination, sandblasting, and ultrasonic cleaning

[0070] Decontamination: 304 stainless steel substrates were ultrasonically cleaned with acetone, hydrochloric acid and deionized water for 12 minutes in sequence, and dried in an oven at 50°C for 45 minutes.

[0071] Sand blasting: Fix the 304 stainless steel base material on the support platform, and use corundum sand with a particle size of 23 mesh for sand blasting. Adjust the air source pressure of the jet to 0.8MPa, adjust the power of the sandblasting machine to 4.0KW, keep the angle between the sandblasting gun mouth and the surface of the stainless steel substrate at 50 degrees, and keep the distance at 11cm.

[0072] Cleaning: The substrate after sandblasting was ultrasonically cleaned with acetone, alcohol, and deionized water for 12 minutes in sequence, and then dried in a 50°C oven for 45 minutes after the ultrasonic wave was complet...

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Abstract

The invention belongs to the technical field of corrosion prevention of stainless steel surfaces, and particularly relates to a surface anti-corrosion method of a metal substrate. According to the surface anti-corrosion method, a multicomponent alloy penetration technique is adopted on the basis of a plasma spraying technique, so that a zinc-titanium alloy carburizing layer is formed on the surface of the stainless steel substrate, and the binding force of a Zn-Ti-Al2O3 hot spray coating and the surface of the substrate is greatly increased; by adopting the zinc-titanium alloy carburizing layer, the corrosion effect caused by the existence of ceramic coating pores can be reduced, and the anti-corrosion capability of the spray coating is increased. Therefore, the binding force of the spray coating prepared by adopting the technical scheme and the surface of the stainless steel substrate is large, so that the spray coating is difficult to peel off, and the high-temperature oxidation and corrosion resistant performance of the metal substrate is improved.

Description

technical field [0001] The invention belongs to the technical field of stainless steel surface anticorrosion, and in particular relates to a method for surface anticorrosion of a metal substrate. Background technique [0002] Although stainless steel generally has good corrosion resistance in the air, stainless steel does not have good corrosion resistance under any working conditions. In engineering applications, the local corrosion of stainless steel is extremely harmful because of its concealment and suddenness (Zhang Yong, et al.Relationship of the yttrium compounds with the alloying method in ods ferritic stainless steel. Journal of RareEarths.1995.13( 4):305-307), should be extra vigilant. Therefore, the research and improvement of stainless steel surface anticorrosion is of great significance in this field. [0003] At present, the anti-corrosion methods of stainless steel mainly include painting, galvanizing or coating by thermal spraying technology on the surface ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/06C23C4/134C23C4/18
CPCC23C4/06C23C4/134C23C4/18
Inventor 聂铭黄丰董重里
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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