Treatment of cathodes for use in electrolytic cell

Details Treatment of cathodes for use in electrolytic cell Treatment of cathodes for use in electrolytic cell

C - Chemistry, Metallurgy

25

B

149/15, 204/185

C25B 11/00 (2006.01)

Patent

CA 1249547

ABSTRACT TREATMENT OF CATHODES FOR USE IN ELECTROLYTIC CELL A method of treating the surface of a cathode in order to remove therefrom deposited iron, the cathode comprising a metallic substrate at least part of the surface of which has been activated in order to reduce the hydrogen overvoltage at the cathode when the cathode is used in the electrolysis of water of aqueous solutions, and the method comprising contacting the surface with a liquid medium which reacts with and solubilises the deposited iron. Removal of deposited iron results in a decrease in the hydrogen overvoltage of the cathode. The liquid medium may be an aqueous acidic solution and the cathode may be contacted with the liquid medium in situ in the electrolytic cell.

461599

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