Inventors:
Edward L. Cote - Novi MI
Andrew D. Wenzel - Mount Horeb WI
Lance E. Agness - Rowann IN
Assignee:
The Ford Meter Box Company, Inc. - Wabash IN
International Classification:
C23G 102
US Classification:
134 3, 134 1, 134 2, 134 221, 134 2213, 134 2214, 134 2217, 134 2219, 134 26, 134 28, 134 29, 134 36, 134 41, 134 42, 510254, 510375, 510378, 510435, 510480, 510488, 510501
Abstract:
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.