Abstract

Equilibrium solubility data for ZnO in KOH are reported for KOH concentraiions up to 14M.Results of passivation time determination for horizontally orientated zinc anodes In alkaline zincate electrolytes are reported. These results are correlated in the form: (i–i1) tp½ = k, where k and i1 depend on [Zn(II)], [OH−] and temperature. Passivation occurs when the [Zn(II)] at the anode is equivalent to the [OH−] of the electrolyte.Overpotential–current density relationships indicate that the charge-transfer reactIon is complicated.

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