Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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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

Sheetal Patel
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
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,

Sheetal Patel
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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