Method of controlling the potential of electrically-...

Details Method of controlling the potential of electrically-... Method of controlling the potential of electrically-...

C - Chemistry, Metallurgy

25

B

204/78.3

C25B 1/04 (2006.01) C25B 15/00 (2006.01) C25B 15/02 (2006.01)

Patent

CA 1171024

- 29 - Abstract of the Disclosure: A method of reducing the overvoltages for hydrogen and oxygen evolution in alkaline water electro- lysers while preventing displacement o the potential of electrically-floating cell components to a region where they are susceptible to corrosion is disclosed. The method comprises adding to the electrolyte between 0.01 and 10 gpl of vanadium ions and controlling the potential of the electrically-floating cell components so as to maintain such potential out of the region where corrosion cracking may occur by simultaneously adding between 0.1 and 20 gpl chromium ions to the electrolyte, or by using an electrical circuitry requiring no external source of power.

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