Cyclic Voltammetric Studies of the Behavior of Pb-0.3%Ag-0.06%Ca Rolled Alloy Anode during and after Zinc Electrowinning

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

doi:10.4028/www.scientific.net/AMR.750-752.2232

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 750-752Cyclic Voltammetric Studies of the Behavior of...

Cyclic Voltammetric Studies of the Behavior of Pb-0.3%Ag-0.06%Ca Rolled Alloy Anode during and after Zinc Electrowinning

Abstract:

In this paper, electrochemical behaviour of Pb0.3%Ag0.06%Ca rolled alloy anode during the 6 days galvanostatic electrolysis in acid zinc sulphate electrolyte solution was investigated with Cyclic Voltammetry (CV) techniques. The phase composition of the anodic oxide layers during the electrolysis was observed using X-Ray Diffraction (XRD). The results revealed that with the increasing electrolysis time, the anodic peak (PbPbSO₄) is mainly present a rise trend in the first day electrolysis, thereafter, almostly keep a constant value. And the anodic peak (PbPbSO₄) gradually moved in the positive direction while the anodic peak (PbSO₄β-PbO₂, PbOα-PbO₂) strongly moved in the negative direction. The cathodic peak (β-PbO₂ and α-PbO₂PbSO₄) and (PbO and PbSO₄Pb) mainly present a rise trend and gradually moved in the negative direction. Besides, the corrosion phase of the anodic oxide layers mainly consist of PbSO₄, Pb, α-PbO₂ and PbS₂O₃. After electrolysis for 3 days, the major phase of the anodic oxide layers is PbSO₄ with a few Pb phase. When the electrolysis reaches the 6th day, the major phase of the anodic oxide layers is also PbSO₄ with a few α-PbO₂ phase. The preferred growth orientation of PbSO₄ is (021) ,(121) and (212) planes.

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Periodical:

Advanced Materials Research (Volumes 750-752)

Pages:

2232-2235

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.750-752.2232

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Online since:

August 2013

Authors:

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

Keywords:

Cyclic Voltammetry (CV), Pb-0.3%Ag-0.06%Ca Alloy Anode, Zinc Electrowinning

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