Abstract
Influence of impurities included in copper anode upon the anode potential-time curve has been studied. The anode polarization potential during electrolysis at constant temperature and constant current density was measured against a copper reference electrode. Results for sulfur, lead and oxygen are reported.Sulfur included in copoer anode formsβ-Cu2S anode slime during electrolysis. Anode potential is raised and the time to become the passive state is shortened with increase of sulfure content. Lead forms PbSO4slime and its effect on anode potential is similar to sulfur. Behavior of oxygen is complicated. At low bath temperature anode potential depends on oxygen content, but at high bath temperature influenced other factors such as current density etc.Müller's Bedeckungstheorie may be applied at the present investigation.
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