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Passivation Type Call-Out

What different types of passivation are there?. The print call-out says per QQ-P-35 type optional. The material is 304L

Richard Ford
Machine Shop - Albuquerque, NM, USA
July 9, 2009

QQP35 has four types, two of which are recommended for 304.

You can read it at http://assist.daps.dla.mil/quicksearch/

Also note that QQ-P-35C [from DLA] has been replaced by ASTM A967 and SAE/AMS2700 for aerospace, both of which allow citric type passivation as well as the nitric. Let us know if we can help.

Ray Kremer
Stellar Solutions, Inc.

McHenry, Illinois

July 14, 2009

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