... is Oxidation, Reduction occurs at the Cathode), or AnOx Red Cat (Anode Oxidation, Reduction Cathode), or OIL RIG (Oxidation is Loss ... , Reduction is Gain of electrons), or Roman Catholic and Orthodox (Reduction - Cathode, anode - Oxidation), or LEO the lion says GER ( ... is Reduction)This process is widely used in metals refining. For example, in copper refining, copper anodes, an intermediate ...