Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site

World's #1 finishing resource since 1989
No login needed: Chime right in

topic 59109

Trivalent chromium plating VS non-hex chromium plating?



January 3, 2013

Q. We are asking our suppliers for non-hexavalent chromium coating. Is non-hex chromium plating the same as trivalent chromium plating or is trivalent chromium plating a type of non-hexavalent plating?

Isabelle Des
- Montreal


January 1, 2013

A. Hi Isabelle. Although trivalent is non-hexavalent, non-hexavalent doesn't imply trivalent. But are you talking about chrome plating or chromate conversion coating? They are very different things.

There is a very valid reason for telling your suppliers you don't want hexavalent chromate conversion coating: the parts won't pass European RoHS, ELV and other standards, and it leaves carcinogenic hexavalent chromium on parts that can be touched by people.

Chrome plating leaves only chrome metal on the parts, whether they were plated in a trivalent or hexavalent plating bath.

It can be dangerous to tell people what they can and can't do if you don't understand the implications of what you are telling them though. If you can tell us what you are plating, and with what, and why,we can probably say more.

Regards,

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

none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start 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:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA