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

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

-----

RoHS exemption of Hexavalent Chrome?

2006

We are hardware manufacturer. Some of our products need Zinc plating, then chromate conversion. As I learned from this link -- http://www.pb-free.info/rohsexemptions.htm , exemption was granted to "Hexavalent chromium (CRVI) passivation coatings". When I read further down the page, the application for exemption of "Hexavalent chromium (Cr-VI) in chromate conversion coatings as surface treatment" was withdraw.

I would like to know what is the different between these two treatment?

Lorin Tam
hardware mfgr, - Hong Kong

The page you linked to gives a further link to original documents that should be consulted, Lorin. But the answer is that there is not a long term exemption except in some individual specialized cases (and even those are only a consultant recommendations, not a final rule). The short answer is that you need to convert to hex-free coatings as the whole world is doing.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2006

(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: