Process for removing surface oxides from a metal substrate

Details Process for removing surface oxides from a metal substrate Process for removing surface oxides from a metal substrate

C - Chemistry, Metallurgy

25

F

204/85

C25F 3/06 (2006.01) C23G 1/24 (2006.01) C25F 1/04 (2006.01)

Patent

CA 1247040

Abstract: The present invention provides a process for removing a metal surface oxide from a metallic substrate by contacting the metallic substrate to be cleaned and having the surface oxide layer thereon with a detergent solution to introduce electrons into the surface oxide in contact with the detergent solution and to dissolve the metal surface oxide, which process is characterized in that a metal piece or carbon piece is immersed in the detergent solution in which gaseous hydrogen has been introduced and the metal piece or carbon piece is electrically connected with the metallic substrate to dissolve the metal surface oxide. The metal piece is preferably made of platinum or vanadium. A preferred detergent solution is that having a pH of about 5 to 7 and containing a complexing agent.

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