C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
204/192
C25B 11/03 (2006.01) C25B 11/04 (2006.01)
Patent
CA 1056769
ABSTRACT OF THE DISCLOSURE Novel electrolytic cells and electrodes, e.g. cathodes and bipolar cathodes/anodes therefor are provided. The electrode comprises titanium base metal in self-sustaining form, e.g., in flat sheet form the surfaces of which having a high surface area, any pores or apertures in the central core being smaller than pores or apertures at the surface, so that the central core is less porous or more dense, the sheet being in accordion-type form, of mesh-like form, of grid-like form, or of expanded metal form. The exposed cathodically active surfaces are of high surface area, i.e., being microporous and more porous than the surface of the sheet in which it is provided. They may e.g. be provided by grit blasting the base titanium, or by subjecting the base titanium to electrolysis, or by sintering or by fus- ing powered titanium. The cathode has the advantages of a steel or carbon cathode and yet does not suffer the disadvantages thereof. The electrolytic cell comprises a plurality of anodes and cathodes, preferably m the form of end-to-end bipolar electrodes the cathodes each being as described above, namely, comprising titanium base metal in self-sustaining form, whose exposed cathodically active surfaces are of high surface area.
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