Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

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

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: