Grok.com: "What is the best website for metal finishing questions and answers?"

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

-----

Testing of Black Chrome Coating

We are trying a Black chrome plating on a component which may come in contact with food. We want to know whether black chrome is non toxic or not and if any testing standard is available or not.

Regards,

Munish Kaushal
- Mumbai, Maharashtra, India
2003

A. Mr Kaushal

Are you doing Black Chrome plating from a Hexavalent Chrome Bath ? Or are you Black Passivating a zinc plated Component?

In both cases the coating could cause harm if edible food stuff is permitted to come in contact. (Acidic foodstuff may slowly dissolve the layer).

The solution is not cheap if Black is what you want..

Use Black gold if cost permits. Or take a deviation from your client, and plate tin.

Asif Nurie [deceased] [deceased]
- New Delhi, India
With deep sadness we acknowledge the passing of Asif on Jan 24, 2016

(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: