Molten salt electrowinning anode with coating of fluorine...

Details Molten salt electrowinning anode with coating of fluorine... Molten salt electrowinning anode with coating of fluorine...

C - Chemistry, Metallurgy

25

C

204/23, 204/195.

C25C 7/02 (2006.01) C25C 3/12 (2006.01)

Patent

CA 1257559

MOLTEN SALT ELECTROWINNING METHOD, ANODE AND MANUFACTURE THEREOF ABSTRACT A method of electrowinning a metal such as aluminum from e.g. a cryolite based melt containing alumina employs an anode having as its operative surface a protective coating which is maintained by the presence of constituents of the coating dissolved in the melt. The protective coating is preferably a fluorine-containing cerium oxycompound electro-deposited in-situ from cerium species dissolved in a fluoride-based melt.

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