The Ford Meter Box Company, Inc.

Lance E Agness

Andrew Wenzel

Edward L Cote

Brass articles having leachable lead are contacted with an aqueous caustic solution that contains a chelating agent. A brass article can optionally be post-treated by contacting it with an aqueous solution containing anazole.

Method for treating brass

Brass articles having leachable lead are contacted with an aqueous caustic solution having a pH of about 10 to about 14 that contains a chelating agent. During contact, the brass articles can be sonicated. The brass articles can be optionally pretreated by contacting them with an aqueous solution containing an organic carboxylic acid and an inorganic per-salt. The brass article can optionally further be post treated by contacting them with an aqueous solution containing sodium persulfate.

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Wabash, IN, United States of America

Lance E Agness