Effect of ionic strength on the passivation of zinc electrodes in KOH solutions
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Times to passivation have been measured for zinc electrodes in KOH-KF solutions at room temperature. A linear relationship betweeni andt−1/2 was obtained. The intercept of these lines is interpreted to be a limiting current density. This limiting current density reaches a maximum in solutions 5M in KOH. Beyond this concentration the limiting current density decreases. This phenomenon is explained in terms of the loss of unbound water as the ionic strength of the solution increases.
KeywordsZinc Physical Chemistry Linear Relationship Ionic Strength Solution Increase
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