No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

Mil-C-5541, Class 1A, Type II RoHS Compliant




I have a customer requesting a Mil-C-5541, Class 1A, Type II Pretreatment process, prior to Powder Coating their parts. They also stipulate the Iridite color is Yellow, and RoHS Compliant. It seems to be a contradiction in terms. I was under the belief that the Chrome is what makes it yellow, and the Chrome which is regulated by RoHS. I have also heard that its possible to add dyes to the clear, but wouldn't that alteration present a problem with compliance to Mil- C-5541?

David Grabowski
president of finishing shop - Fridley, Minnesota
January 29, 2009


I agree, it's a Catch 22, customers are such a pain :-).

Leo Herringon
consultant - Grand Rapids, MI, USA
February 3, 2009



I've seen most of the trivalent chrome processes available on the market and they are all clear with not even a trace of yellow. There is a permanganate process that results in a purple-green coating which offers equivalent protection on some alloys, however, I've never seen a yellow that isn't a downgraded clear!

milt stevenson jr.
Milt Stevenson, Jr.
Syracuse, New York
February 10, 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:

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


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"