EFFECT OF PHOSPHORIC-ACID ON THE POSITIVE ELECTRODE IN THE LEAD-ACID-BATTERY .2. CONSTANT POTENTIAL CORROSION STUDIES

The effect of H3PO4 on the constant potential corrosion of the positive grid in the lead-acid battery has been studied. The metallurgical and chemical properties of the corrosion products have been examined and correlated with their electrochemical behavior during self-discharge and voltammetric cycling. Low concentrations of H3PO4 in the electrolyte modify the crystal growth of PbO2 on the lead grid, producing a structure which is not readily discharged to PbSO4. © 1979, The Electrochemical Society, Inc. All rights reserved.