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  for Metal Finishing since 1989
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Passivation of the Titanium

I am working on the passivation of titanium product using 50% Nitric Acid. I would like to replace it with citric acid if possible. The question is: "Is it possible to do", if YES, at what concentration.

Thank you,

Gene Nadelson
- Brooklyn, New York

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Gene:

Yes, it is possible to passivate your titanium with citric acid formulations. I am not familiar with using straight citric acid , only with proprietary formulations that we can't talk about here. I do not know if just citric acid alone will work. With proprietary formulations we have been able to remove all of the iron from the surface easily at concentrations of 5-10%. We would be happy to discuss this with you if you contact us.

Lee Kremer
Stellar Solutions, Inc.

McHenry, Illinois