No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

finishing.com -- The Home Page of the Finishing Industry

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

Hexavalent Chromium in Trivalent Passivating Baths?

My name is Tom Rochester and I have written articles on trivalent passivates. Has anyone ever heard of hexavalent chromium being detected in trivalent passivating baths? (I never have.) I am not referring to hexavalent chromium on the parts or the films produced, but actually in the baths themselves. If anyone has heard of this happening, I would appreciate hearing some of the details. Thanks!

Tom Rochester
CTO - Jackson, Michigan, USA
Plating Systems & Technologies, Inc.

plating systems & technologies banner ad

October 13, 2011

December 18, 2011

I met this problem before
because of HNO3, sometimes goes from Cr +3 to Cr +6
this is true
but limit is important up to 3 ppm I remember

Dr Halim Polat
- Istanbul

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

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: