ELEKTROD FOR ANVENDNING VID ELEKTROKEMISKA PROCESSER, SETT VID TILLVERKNING AV DENSAMMA SAMT CELL FOR ELEKTROLYS AV ALKALIMETALLKLORIDLOSNINGAR FORSEDD MED EN SADAN ELEKTROD

1354897 Anodes for use with Hg cathodes IMPERIAL CHEMICAL INDUSTRIES Ltd 24 Feb 1972 [22 March 1971] 7467/71 Heading C7B [Also in Divisions B2 and H1] An electrode, e.g. for use in electrolysis of alkali metal chloride using a mercury cathode, fuel cells, electro-synthesis or cathodic protection comprises a support member of titanium, zirconium, niobium, tantalum or tungsten or an alloy thereof having a coating consisting of (a) ruthenium dioxide, (b) titanium dioxide, and (c) one or more of tin dioxide, germanium dioxide and oxides of antimony. The coating may be applied as a paint composition of thermally decomposable compounds of ruthenium, e.g. ruthenium trichloride or ruthenium resinate; tin, germanium and/or antimony, e.g. alkoxides, alkoxyhalides or halides; and organo-compounds of titanium, e.g. alkyl titanate or alkyl halotitanate, and an organic liquid, e.g. pentanol, and thereafter heating to at least 350‹ C in an oxidizing atmosphere to convert the metal compounds to the oxides thereof. The coating may be formed by sequential production of a plurality of such layers.