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Rhodium plating problem: not white anymore

Q. Hello sir,

I am facing a rhodium plating problem.

Please can you let us know the procedure how to do rhodium please we just require the whiteness; that's the problem we are facing please.

Thank you.

Regards,

Aman Mehta
- Mumbai, India
October 2, 2008
publicly reply to Aman Mehta

Q. Hello sir
Even I am facing the same problem with my rhodium solution; it is new.

Pavan soni
- Shahada, Maharashtra
July 22, 2011
publicly reply to Pavan soni

A. Hi, Pavan. The supplier of your rhodium plating solution can probably help you with what operating condition is causing the problem. But thread 42108 addresses the issue in pretty good depth. Good luck.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
publicly reply to Ted Mooney

I plate the rhodium for a year and always add rhodium to maintain the rhodium level by using AMPERE MINUTE. So I do not need to count the Amperes to add rhodium into the bath.

Now I got serious problem about my plating. My rhodium is not white anymore. It's turn to be grey color. Could you please explain to me about this problem and what is the solution?

I afraid that my rhodium is run out. What will be if rhodium run out. What is the result from this plating?

Thanks a lot for your kindness.

Bear Chiang
plating shop - Thailand
March 9, 2011
publicly reply to Bear Chiang

Metallic contamination will cause rhodium to plate gray.

Neil Bell
Albuquerque, New Mexico
publicly reply to Neil Bell

Rhodium solution gets easily contaminated with metallics. You can carbon treat your rhodium solution to remove the metallic contamination. Top up your rhodium content after carbon treatment.

SK Cheah
- Penang, Malaysia
publicly reply to SK Cheah

Some metallic contaminants can be removed from rhodium solution using potassium ferrocyanide ⇦ on eBay or Amazon [affil links] and filtering but carbon treatment will only remove organic contamination.

Neil Bell
Albuquerque, New Mexico
publicly reply to Neil Bell

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