Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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

The authoritative public forum
for Metal Finishing since 1989
-----

Any difference between Dichromate and Trichromate?

Sir/Madam:

I work in Ship Repair Facility here in Japan. Our facility can perform dichromate finishes, and Japanese companies only do trichromate. What is the difference?

Ruben Delarosa
Production Specialist - Yokosuka, Japan
March 7, 2008

Hi, Ruben. When individual words are presented with limited context it can be difficult or impossible to know what they mean. Dichromate is Cr₂O₇^-2 Trichromate would be, what, Cr₃O₁₀^-2? I don't think such an anion exists.

My suspicion is that someone somewhere is telling you that you should be using RoHS compatible trivalent "chromate", not "trichromate". Good luck

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
March 10, 2008

(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: