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Exchange of carbonate in my brass banns

I have problems with the carbonate formation in my brass banns, want to know on some type of resin of exchange of ions that it only holds back carbonate of the bath and keeps cianeto (CN)

JORGE VIEIRA
RIO DE JANEIRO, RJ, BRASIL
2003

Hi Jorge. I don't know what 'banns' are; this might be just a typographical error or a translation difficulty though. But the usual way to remove carbonates from brass plating baths is by freezing them out.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2003

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