Electropolishing aluminum and aluminum alloys

Details Electropolishing aluminum and aluminum alloys Electropolishing aluminum and aluminum alloys

C - Chemistry, Metallurgy

25

F

204/83.5

C25F 3/20 (2006.01)

Patent

CA 1095456

ABSTRACT OF THE DISCLOSURE A process and bath for electropolishing and brighten- ing aluminum and aluminum alloys. The bath preferably contains from about thirty percent to about ninety-five percent phosphoric acid and from about five percent to about seventy percent of a poly (alkylene ether). A minor amount, generally from about 0.05 to about two percent, of a wetting agent may be added to the bath if desired. The bath forms a protective foamy film over the part being electropolished, thereby protecting the part against chemical attack by the bath. Further, the polyether additives are chemically and thermally stable in the electrolyte under normal bath operating conditions. The bath may be operated at low voltages ranging from about 15 to 100 volts.

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