QQ-P-35 spec & chemical ratio's

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We want to develop a small in-house passivation process to be used for limited qty parts (clinicals).
I have ASTM A967 [link is to spec at TechStreet] but would like a free copy of qq-p-35 so we can get the chemical concentration numbers. We already have a lab being used for electro polish development so the equipment is in place to use for small quick batch process of passivation.

Are the volume % based upon 100% Nitric Acid or are they in ratio to the commercial available 70% solution you purchase from the distributor?

Eric Harmony
medical instruments - Woburn, Massachusetts

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QQ-P-35C can still be freely downloaded [not verified, the site was down] at the Defense Department's ASSIST site (http://assist2.daps.dla.mil/quicksearch/). When last checked, it was identical to SAE's QQ-P-35C [link is to spec at TechStreet].

The volumetric concentrations are based upon the use of 67 wt% HNO₃, Technical Grade Nitric Acid (not 70 % reagent grade). Same for ASTM A380 [link is to spec at TechStreet] & A967.

Ken Vlach
- Goleta, California

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Both the DOD QQ-P-35C [link is to spec at TechStreet] and the AMS-QQ-P-35 [link is to spec at TechStreet] have been canceled and are no longer specifications to be used for passivation.

QQ-P-35c is replaced by ASTM A-967 except for aerospace, which should use AMS 2700B (replacement for AMS QQ-P-35).

Commercial citric acid formulations are an alternative to the nitric formulations.

Lee Kremer
Stellar Solutions, Inc.

McHenry, Illinois

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I just checked for the latest revision for AMS QQ-P-35 And the SAE website is still showing Revision: MAY 1998, I can not find where this has been (Canceled and replaced with AMS-2700 [link is to spec at TechStreet]B) can you please let us know where we may find this information?

Thank you,

Jim Denton
Anodizer - Elkhart, Indiana

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AMS QQ-P-35 was canceled in April of this year by SAE/AMS Committee B, reconfirmed in the September meeting. It was canceled in favor of AMS-2700 [link is to spec at TechStreet]. The cancellation apparently still has not been put through the paperwork at SAE.

Lee Kremer
Stellar Solutions, Inc.
McHenry, Illinois

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Most of my suppliers have their own standard of passivation process and they are not certain whether they conform to the AMS-2700 [link is to spec at TechStreet]B standards. What must I ensure that exist in the passivation process of my suppliers before I declare that it is within the AMS 2700B standards.

Masrurah Marzuki
- Singapore