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-----What is the precautionary measure for red rusting on stainless steel 316?
November 6, 2009
I am the student of Chemical engineering. & right now I am working on this topic, that's why I want to know.
Thanks,
Sheetal
student - Rajkot, Gujarat, India
Hi, Sheetal. I'm not positive that I understand your question, but I believe that you are thinking of "passivation of stainless steel".
Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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November 6, 2009
November 28, 2009
I need to know the passivation of S.S. 316 against red rust, which can be for longer period of time.
Here I am sending you the photographs for your reference.

Awaiting for your reply,
Thanks,
student - Rajkot, Gujarat, India
Passivation can be performed with nitric acid or citric acid. Relevant documents include QQ-P-35C (canceled) [link is to free spec at Defense Logistics Agency, dla.mil]c and ASTM ASTM A967.

Ray Kremer
Stellar Solutions, Inc.
McHenry, Illinois

December 7, 2009
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