Abstract

The nucleation and growth of pits on battery zinc alloy electrodes in commercial (standard) Leclanché and related electrolytes has been studied quantitatively using both potentiodynamic and potentiostatic techniques. Pit numbers, volumes, surface areas and distributions have been determined by optical microscopy. The effect on pitting kinetics of pH, NH + 4 ions and various anions: Br −, Cl −, ClO − 4 and SO 2− 4, has also been investigated. A theory is provided which acts as a basis for interpreting the observed time dependence of the pitting current density at constant potential and deviations of the real system from the idealized model are discussed.

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