Selective electrolytic removal of metal coating from base...

Details Selective electrolytic removal of metal coating from base... Selective electrolytic removal of metal coating from base...

C - Chemistry, Metallurgy

25

F

204/87

C25F 5/00 (2006.01) H05K 3/06 (2006.01)

Patent

CA 1294238

ABSTRACT OF THE DISCLOSURE Metal coatings are stripped from base-metal substrates in an electrolytic process employing an aqueous solution of alkanesulfonic acid of 1 to 4 carbons as the electrolyte at a concentration of from about 45 to about 70 weight percent, the coated base-metal substrate as the anode, and an electroconductive cathode, by impressing an electromotive force across the solution between the electrodes until the current decreases to zero which occurs when the metal coating on the anodic material is depleted and the base-metal substrate is left exposed.

531903

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