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US 2003/0111093 A1Published application
Method for treating brass
OwnerEdward L. Cote, Andrew D. Wenzel +1inventors
InventorsEdward L. Cote, Andrew D. Wenzel, Lance E. Agness
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Abstract
Brass articles having leachable lead are contacted with an aqueous caustic solution that contains a chelating agent. The brass article can optionally be post-treated by contacting them with an aqueous solution containing hydrogen peroxide.
Claims9
A method of treating brass articles to reduce leachable lead therein which comprises the steps of:
- contacting a brass article with a primary treatment solution to reduce leachable lead therein, the primary treatment solution comprising an aqueous caustic solution containing a chelating agent;
- and contacting the brass article with a post-treatment solution after being contacted with the primary treatment solution, said post-treatment solution comprising an aqueous solution containing hydrogen peroxide.
Dependencies are inferred from the claim text.