HOME FAQs BOOKS JOBS: Help Wanted Suggestions you are here: Hotline/Forum => Letter 51013

How to tell gold anodize from gold chromate?

January 20, 2009

How to distinguish gold anodized and gold chromate? And how to confirm the finish is gold chromate?
our supplier make double finish but hard to confirm by visual.

Jin Hang
buyer - Dongguan,Guang Zhou province, China
^- Privately contact this inquirer -^

January 21, 2009

Hi, Jin. A simple V-O-M should do it. The anodized finish will be extremely resistive and the chromated finish will be significantly conductive. Once your inspector has a good feel for it, s/he will probably be able to do it visually with reliability.

Regards,

Ted Mooney, P.E.
finishing.com
Brick, New Jersey

February 3, 2009

Also see Letter 36690 on his site
Can Diphenyl Carbazide method be used to test chromate conversion coatings on alu?

Leo Herringon
- Grand Rapids, MI, USA

March 11, 2009

Usually anodised gold colour is more even and non-conductive and chromate coated gold colour has a bit rainbow colour and not that beaufiful.Chromate conversion coating gold colour is more conductive.

lee leong tee
plating company - malacca, malaysia

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: