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Passivation for Stainless 318



October 27, 2008

What type of passivation according to QQ-P-35 should I use for stainless 318?

Anat Gilboa
Engineer - Israel



October 29, 2008

Hi, Anat. MIL-QQ-P-35 is cancelled, but it calls for only nitric and nitric-chromic solutions. Type 318 stainless is not mentioned specifically, but Type VI or Type VII passivation solution is recommended for austenitic steels including type 316 and type 321.

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey


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