stainless steel sensibilization test, ASTM A262 is needed, thanks

[Tiquibola]

One of the first corrosion problems relating with welding is the intergranullar attack in the ZAT (zone affected thermally). The carbon is combined with chrome to form chromo carbides in the grain boundary at 425-900ºC. The area nearest to the carbides has lower chrome amount. When the carbides net is continue, the zone impoverished in chrome around the grains coulb be selectively attacked, resulting in intergranullar corrosion. This phenomenon is called stainless steel sensibilization.

ASTM A262 gives you the test to be done to demonstrate if stainless steel is sensibilizated.

[Nabilia]

A 262 – 02 Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels

[link Point to another website Only the registered members can access]

[Tiquibola]

Nabilia, many thanks for the standard. I can contribut with my knowlegde about stainless sensibilization. If you or anybody needs information o experience let me know. Thanks again.