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topic 5384

Where Can I get Specifics on Citric Acid Passivation?


I am currently using a nitric acid/sodium dichromate three bath passivation system and I would like some information on citric acid passivation.

Maggie Osler
- Cleveland, Ohio



We manufacture Citric acid passivation chemicals. Please contact us for further details and information, or go to the linked web site. Best regards, Lee Kremer Stellar Solutions, Inc.

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Lee Kremer
Stellar Solutions, Inc.
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McHenry, Illinois
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Take a look in ASTM A967 [link by ed. to spec at TechStreet] . There are five Citric acid based procedures for simple passivation. Our company uses a proprietary Citric based chelating solution that provides superior test results over Nitric, Phosphoric and simple Citric processes but unless you are in the semi conductor or pharmaceutical business you don't have a need for such sophisticated processes. The simple ambient Citric process test higher on ESCA than 20% Nitric!

- Downey, California

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