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Curated with aloha by
Ted Mooney, P.E. RET
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PICKLING PROBLEM FOR BRASS SHEETS
2003
Sir,
I am facing difficulty in pickling brass sheets up to the expectation of our customers. The sheets after sulfuric acid pickling are somewhat reddish & blackish also (specially for brass sheets containing impurities like lead, tin, aluminium etc.) I do not want to use nitric acid due to its fuming nature. Which chemical should I use to avoid water stains on the sheets?
Please suggest.
Sarabjot Singh- India
You probably need an oxidizing agent; sulfuric acid won't do that. A mix of sulfuric acid and hydrogen peroxide may solve your problem without requiring the use of nitric acid. This mixture is available as a proprietary which includes stabilizers to keep the hydrogen peroxide from spontaneously degenerating.
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Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2003
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