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Electrochemical Behaviors of Pb–0.3%Ag-0.06%Ca Rolled Alloy Anode during and after Zinc Electrowinning - Tafel Investigations

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Abstract:

In this paper, the oxygen evolution potential and kinetics of Pb–0.3%Ag-0.06%Ca rolled alloy anode during the 15 days electrolysis in acid zinc sulphate electrolyte solution were investigated with galvanostatic polarization curve and Quasi-stationary polarization (Tafel) techniques. The results revealed that the anodic oxygen evolution potential and reaction kinetics varied a lot during the electrolysis for it is a process indicating the formation and stabilization of anodic oxide layer. With the increasing electrolysis time, the potentials (MSE) and overpotentials of oxygen evolution mainly present a declining trend while the electrode surface exchange current density a rising trend.

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Periodical:

Applied Mechanics and Materials (Volumes 401-403)

Pages:

779-782

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.401-403.779

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Online since:

September 2013

Authors:

Hai Tao Yang, Huan Rong Liu, Zhong Cheng Guo, Bu Ming Chen, Yong Chun Zhang, Rui Dong Xu

Keywords:

Oxygen Evolution Kinetics, Pb-03%Ag-006%Ca Rolled Alloy Anode, Quasi-Stationary Polarization, Zinc Electrowinning

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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