Electrode comprising a coated valve metal substrate

Details Electrode comprising a coated valve metal substrate Electrode comprising a coated valve metal substrate

1991-08-23

1994-08-02

Gorgos, Kathryn

Chemistry: electrical and wave energy

Processes and products

204128, 204290F, 427125, 4271263, 4271265, 427226, 427229, 4274193, 427404, C25B 116, C25B 1110

Patent

active

053342933

ABSTRACT:
An electrode which comprises a substrate of a valve metal or an alloy thereof having properties similar to those of the valve metal and a coating comprising an outer layer which comprises RuO.sub.2, an oxide of at least one non-noble metal and at least one other noble metal or oxide thereof and an intermediate layer having a composition different from that of the outer layer and which comprises RuO.sub.2 and an oxide of at least one non-noble metal. The electrode is particularly useful as an anode for an electrolytic cell, eg a chlor-alkali cell, it has a lifetime therein which is greater than the sum of the operational life-times of electrodes which comprise a valve metal substrate and which separately comprise one of the above layers which together form a part of the coating of that electrode.

REFERENCES:
patent: 4530742 (1985-07-01), Carlin

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