Corrosion of porous iron electrodes containing metal additives in alkaline batteries

Abstract

Major problems currently associated with alkaline porous iron electrodes include the high rate of selfdischarge and the low utilisation efficiency of the active iron. The corrosion rates of porous iron electrodes electrodeposited with lead, mercury, silver, copper, or sulphur were analysed by the open circuit potential decay, cathodic potentiostatic polarisation, and gasometric methods. It was found that incorporation of elemental sulphur and copper produced the lowest corrosion rates.