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Nitric Acid Passivation Procedure

Hi, I am working in sterile area I want to know the procedure of passivation of new stainless steel GRADE 316L holding vessels of capacity 100 liter with nitric acid also give the concentration and volume of final solution required for passivation.

THANKS

KHURRAM AHMED
ASSISTANT MANAGER - KARACHI, PAKISTAN
August 5, 2008

Nitric acid passivation procedures are easily found in the old mil spec QQ-P-35C [link is to free spec at Defense Logistics Agency, dla.mil] or either of its replacement specs ASTM A967 or AMS2700.

You may also use citric acid based passivation.

Ray Kremer
Stellar Solutions, Inc.

McHenry, Illinois

August 26, 2008

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