Imi Kynoch Limited

Marston Palmer Limited

Peter C Hayfield

A titanium or niobium electrode substrate (which may be copper or steel cored) having on its surface a painted and fired anodically active layer for example of a platinum group metal, there being an interlayer of tantalum or an alloy containing more than 50% tantalum in metallic form between the anodically active layer and the substrate. The tantalum metal gives enhanced corrosion resistance and acid undermining resistance to titanium substrates and eases the manufacture of painted and fired niobium substrate electrodes. The electrode may be an elongate rod having longitudinally extending protuberances along the length of the rod and around the circumference, the spacing and height of the protuberances being such that a straight line connecting the peaks of two adjacent protuberances does not intersect with the body of the electrode so that the protuberances protect the anodically active coating from damage during installation and operation of the electrode.

Electrode with anode active layer

An electrode particularly useful in hypochlorite cells operating at low temperatures or in metal winning cells in which the electrode comprises a titanium substrate with a platinum metal coating and an intermediate coating of substoichiometric tantalum oxide.

Growing community of inventors

Church Garth, United Kingdom

Peter C Hayfield