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Is Trivalent Chrome Passivation an Electrolytic Process?

November 4, 2008

We want to do trivalent chrome conversion coating for our aluminum aircraft parts. Is TCP process an electrolytic process?
Which reactions take place during trivalent chrome passivation?
Kind regards.

GülsümÖzden
Specialist - Ankara

Trivalent passivation of aluminum is an immersion process. If follows a cleaning and deoxidizing procedure.

Gene Packman
process supplier - Great Neck, New York
November 5, 2008

TCP means trivalent chromium plating. This is done on decorative nickel platings as a decorative finish with insoluble anodes and a rectifier. On the other hand trivalent chromate on aluminium is a dipping process without current.

Emrah Inçal
- Turkey
August 4, 2009

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