Process for removing metal surface oxide

Details Process for removing metal surface oxide Process for removing metal surface oxide

1984-06-13

1985-10-01

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041415, 204144, 204145R, C25B 104, C25F 106

Patent

active

045444625

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

REFERENCES:
patent: 1511967 (1924-10-01), Holland
patent: 3666667 (1972-05-01), Wieczorek
patent: 3900376 (1975-08-01), Copsey et al.
patent: 4264418 (1981-04-01), Wood et al.
"The Galvanic Series" Hanson Van Winkle Mining Co., 1949.

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