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

-----

BLACK CHROMATE ON ALUMINIUM

I need some information about BLACK CHROMATE ON ALUMINIUM.
I need to know if Al has this kind of chromate coating or not and if yes, what is the bath solution contents?

Ali Eskandari
- Iran
May 8, 2008

May 9, 2008

Hi, Ali. In this country (and probably most of the world) few if any chromating shops mix their own black chromating solutions from raw chemicals. Rathr, they buy proprietary (patented or trade-secret) formulations. I think that is what you should do. But you can search through expired patents for formulations. We cannot print any formulations here unless the responder tells us where it is published because we have no practical way of knowing whether it is public knowledge or trade secret. Sorry, and good luck.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

(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: