Dimensionally stable anode for molten salt electrowinning and method of electrolysis

Abstract From the Canadian patent

The morphology of a coating of Ce oxyfluoride on a conductive substrate is improved by doping with yttrium lanthanum, praseodymium and,or other rare earth metals other than cerium. Whereas the pure Ce-oxycompound coating shows cracks which frequently extend throughout the entire thickness of the coating, thus exposing finite portions of the substrate to eventual corrosive attack from the environment, the improved coating including the above doping element(s) comprises a substantially impervious structure. Coatings of this nature may be employed with non-consumable anodes in molten aluminum electrowinning cells or as chemical sensors, corrosion protection and other applications.