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Pitting on antique brass finishing

hi
we are doing antique brass on zammak buckle but we found pitting on it,how to remove it ?

our process is
cleaning,dipping,copper ,brass,antique and then finishing

regards

Tariq Malik
plating shop employ - Pakistan
April 24, 2010

April 26, 2010

Hi, Tariq. It isn't clear what kind of pits you are speaking of or at what step they originated. Get back to us.

Regards,

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

April 29, 2010

pittings are hard and small dots , they appear after brass and become more prominent after antique finish.

regards
Tariq

Tariq Malik
- Pakistan

April 29, 2010

Hi, Tariq. It surprises me that these "dots" are not present after copper plating, but only after brass plating. But if that is indeed the case, it seems that they are particles that are not being filtered out. Is there a filter on the brass plating tank? Do you use anode bags on the anode baskets? Is this cyanide brass plating?

Regards,

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

First of two simultaneous responses --

The quality of replies normally is directly related to the amount and quality of the information provided. You have said zero.zero about solutions, times, amperage, and temperatures.
If those do not make a difference to you, you will probably have to live with problems.

James Watts
- Navarre, Florida
April 29, 2010

Second of two simultaneous responses --

yes this is cyanide brass plating, filter is present in brass plating bath but we don't use anode bags.

regards

Tariq
- Pakistan
April 30, 2010

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