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Citation: ZHANG Yongchun, CHEN Buming, GUO Zhongcheng, LIU Jianhua. Corrosion Resistance of Electrodeposited Al/Pb-Ag Anode During Zinc Electrowinning[J]. Chinese Journal of Applied Chemistry, ;2013, 30(4): 458-463. doi: 10.3724/SP.J.1095.2013.20264 shu

Corrosion Resistance of Electrodeposited Al/Pb-Ag Anode During Zinc Electrowinning

a. Department of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
b. Kunming Hendera of Science and Technology Co. Ltd, Kunming 650106, China

Received Date: 14 June 2012
Revised Date: 27 August 2012

A new anode of Al/Pb-0.23%Ag was prepared from methanesulfonic acid bath by electrodeposition for zinc electrowinning. The results of corrosion test and electrochemical analysis show that the Al/Pb-0.23%Ag anode has a lower corrosion rate,higher corrosion potential and lower corrosion current density,higher electrocatalytic activity as compared to conventional Pb-0.25%Ag anode. The metallographic structure and scanning electron microscopy(SEM) observations show that the Al/Pb-0.23%Ag anode has tiny and dense crystals. X-ray diffraction(XRD) analysis shows that the Al/Pb-0.23%Ag anode has the phase of PbSO₄,α-PbO₂ and β-PbO₂ after 48 h of anodic polarization.
- Al/Pb-0.23% Ag anode,
- corrosion resistance,
- zinc electrowinning,
- oxygen evolution reaction potential
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