Dependence of the Composition of the Anodic Layer on the Oxidation Potential of Lead in Sulfuric Acid

Abstract

Potentiostatic oxidations of lead in were performed in the potential range between −900 and +1400 mv (with respect to the mercury/mercury sulfate electrode). The anodic layer was subjected to x‐ray diffraction and chemical analysis. According to the phases present three potential ranges are discerned. From −956 to about −300 mv only is present. From −300 to +900 mv large amounts of and are formed as well as small amounts of , , or orthorhombic and . Above +900 mv the divalent lead compound content decreases, while that of . rapidly increases. Above +1200 mv . is formed.