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A study of the anodic behavior of horizontal zinc electrodes in KOH solution has shown that the equationholds for concentrations in the range 1-13.8M and passivation times in the range 10-800 sec. The constant k depends on the KOH concentrations and attains a maximum value in the region of 8.5M KOH; i~, the maximum current density attainable without passivation, from a least squares fit is very near zero in all cases. From the linear parts of the curves connecting anode potential and time, values of dE/dT indicate that the conductivity of the anodic product prior to passivation depends on the concentration of the KOH electrolyte. This conductivity passes through a maximum in the same region as that which produces the longest passivation times.

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