Process for chemically shaving and pickling copper rod

Details Process for chemically shaving and pickling copper rod Process for chemically shaving and pickling copper rod

C - Chemistry, Metallurgy

22

F

148/10, 149/14

C22F 1/08 (2006.01) C23G 1/10 (2006.01)

Patent

CA 1308002

ABSTRACT A process for producing copper rod having an improved surface smoothness and substantially no surface oxides, which rod is suitable for drawing or rolling into wire, is disclosed. The process com- prises the steps of forming a bath of molten pure copper, casting the molten copper into a cast bar, conditioning the bar for hot-rolling, hot-rolling the bar to form a hot-rolled rod, cooling the hot- rolled rod and chemically shaving and pickling the hot-rolled rod. The chemical shaving and pickling step is performed with a solution containing con- trolled concentrations of sulfuric acid and hydrogen peroxide. Both the solution and the rod are maintained at elevated temperatures and the duration of the r action is controlled. The inter- related process variables are regulated so that substantially all of the surface oxides and a desired amount of copper are removed from the surface of the hot-rolled rod.

557154

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