HOME FAQs BOOKS JOBS: Help Wanted Suggestions you are here: Hotline/Forum => Letter 32072

Trivalent yellow chromate in place of yellow dichromate

++++

Hi, everyone. I have a question regarding to an application we specify "Coating of zinc on steel with yellow dichromate conversion coating". Our supplier is offering something he describes as "Trivalent yellow chromate". I understand, both specifications are different in spite of both are yellow color. Coating we request is used to protect steel parts intended to conduct electrical current.

Our spec requires parts, after coating, must be able support a Salt spray test as per ASTM B 117.

May we use Trivalent yellow chromate in place of yellow dichromate?

David Vazquez
Siemens E & A - El paso, Texas, US

ANSWER or FOLLOW UP POST an unrelated QUESTION HOT Topics

Disclaimer: It is not possible to 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; some names may be fictitious and some recommendations may be deliberately harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: