Corrosion prevention method of stainless steel weld joint or bent area

A bending area, stainless steel technology, applied in the direction of welding equipment, auxiliary welding equipment, welding/cutting auxiliary equipment, etc., can solve the problems of intergranular corrosion in the grinding area, reduce the service life of parts, and shorten the cycle, so as to achieve the service life The effect of improving, increasing the service life and avoiding intergranular corrosion
CN106181586AInactive Publication Date: 2016-12-07SHAANXI AIRCRAFT CORPORATION
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHAANXI AIRCRAFT CORPORATION
Publication Date
2016-12-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to surface treatment technology, and relates to an anticorrosion method for stainless steel weld seams or bending areas. It is characterized in that the anti-corrosion steps are as follows: determine the intergranular corrosion area A of the material; perform mechanical grinding on the intergranular corrosion area A of the material; grind the intergranular corrosion area A of the material; carry out pickling and passivation treatment on the parts. The invention proposes an anti-corrosion method for stainless steel welds or bending areas, which greatly increases the anti-corrosion ability of 1Cr18Ni9Ti stainless steel in salt spray and hot and humid environments, avoids intergranular corrosion of parts again, and improves the use of parts life.
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Description

technical field

[0001] The invention belongs to surface treatment technology, and relates to an anticorrosion method for stainless steel weld seams or bending areas. Background technique

[0002] The stainless steel material 1Cr18Ni9Ti disclosed in "Aeronautical Materials Technology" (2012) published by Aviation Industry Press is a general-purpose chromium-nickel austenitic stainless steel with a carbon content of ≤0.12%, and reducing the carbon content to below 0.03% can fundamentally solve the intergranular problem. Corrosion, adding titanium to the steel is to prevent the tendency of intergranular corrosion of general austenitic steel after heat preservation in the range of 500-800 ℃. This steel has good resistance to uniform corrosion of oxidative acid, but poor resistance to stress corrosion. In the case where resistance to intergranular corrosion is not required, heat treatment is generally not required after welding. During welding or bending, at a high temperature o...

Claims

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