No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

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

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

Silver anodes turn black

I am a supplier of silver anodes to different companies and I have my own melting shop to make these. But I regularly get complaints, that after introducing anode in bath, a few hours later there is some black ingredient coming out from the anode. The crucible which we use for melting silver is made of graphite. Are we using the right crucible or should we use silicon carbide crucible? And also, does graphite get concentrated with silver and result in contaminating the tank? Or is there some other reason for black formation? The most important thing is the testing shows purity of 99.9% .

Darshan Bothra
manufacturer of silver anodes - Chennai, Tamilnadu, India
September 11, 2011

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

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: