The Effects of Nd on Lead Anode for Zinc Electrowinning

Abstract:

Article Preview

A detailed investigation of the effects of Nd on the microstructure, mechanical properties and electrochemical properties of lead anode in 160g.L-1 at 35°C was carried out. Galvanostatic polarization and Chronopotentiometry (CP) were used to study the electrochemical behavior ( such as anodic potential, corrosion rate and the composition of passive film) of the Pb and Pb-Nd anodes. The metallographic structure and passive film morphology of Pb and Pb-Nd anodes were observed and analyzed using polarizing microscope and scanning electronic microscopy (SEM), respectively. The experimental results show the grains become smaller and aggregation of PbxNdy become severe as the content of Nd increases. The addition of Nd enhances the formation of PbO2, inhibits the formation of PbSO4 and PbO and reduces the anodic potential. However, Holes presenting on rough passive film of high Nd content Pb-Nd anodes accelerate the corrosion.

Info:

Periodical:

Advanced Materials Research (Volumes 581-582)

Edited by:

Jimmy (C.M.) Kao, Wen-Pei Sung and Ran Chen

Pages:

1115-1118

Citation:

X. C. Zhong et al., "The Effects of Nd on Lead Anode for Zinc Electrowinning", Advanced Materials Research, Vols. 581-582, pp. 1115-1118, 2012

Online since:

October 2012

Export:

Price:

$38.00

[1] A. Felder, R.D. Prengaman, Lead alloys for permanent anodes in the nonferrous metals industry. JOM-US. 58(10) (2006) 28-31.

DOI: https://doi.org/10.1007/s11837-006-0197-3

[2] A. Tizpar, Z. Ghasemi, Influence of silver on the anodic corrosion and gas evolution of Pb-Sb-As-Se alloys as positive grids in lead acid batteries. APPL SURF SCI. 252(22) (2006) 7801-7808.

DOI: https://doi.org/10.1016/j.apsusc.2005.09.020

[3] B. Monahov, D. Pavlov, D. Petrov, Influence of Ag as alloy additive on the oxygen evolution reaction on Pb/PbO2 electrode. J POWER SOURCES. 85(1) (2000) 59-62.

DOI: https://doi.org/10.1016/s0378-7753(99)00383-3

[4] A. Hrussanova, L. Mirkova, Influence of temperature and current density on oxygen overpotential and corrosion rate of Pb-Co3O4, Pb-Ca-Sn, and Pb-Sb anodes for copper electrowinning: Part I. HYDROMETALLURGY. 72(3-4) (2004) 205-213.

DOI: https://doi.org/10.1016/j.hydromet.2003.07.004

[5] Y. Li, L. X. Jiang, X. J. Lv, et al, Oxygen evolution and corrosion behaviors of co-deposited Pb/Pb-MnO2 composite anode for electrowinning of nonferrous metals. HYDROMETALLURGY. 109(3-4) (2011) 252-257.

DOI: https://doi.org/10.1016/j.hydromet.2011.08.001

[6] Y.B. Zhou, C.X. Yang, W.F. Zhou, et al, Comparison of Pb-Sm-Sn and Pb-Ca-Sn alloys for the positive grids in a lead acid battery. J ALLOY COMPD. 365(1-2) (2004) 108-111.

DOI: https://doi.org/10.1016/s0925-8388(03)00649-2

[7] Liu Fang-qing, Zhang Xin-hua, Ma Min, et al, Effect of Pr and Nd on the Impedance property of anodic Pb(II) film in sulfuric acid solution. Journal of FUDAN University (Natural Science). 47(5) (2008) 650-662.

[8] Hong bo, Jiang Liang-xing, Lv Xiao-jun, et al, Influence of Nd on Pb-Ag alloy for zinc electrowinning. Journal of the Chinese Journal of Nonferrous Metals. 22(4) (2012) 1126-1131.

[9] D. Pavlov, CN Poulieff, E. Klaja, et al, Dependence of the composition of the anodic layer on the oxidation potential of lead in sulfuric acid. J ELECTROCHEM SOC. 116 (1969) 316-319.

DOI: https://doi.org/10.1149/1.2411836

[10] D. Pavlov, N. Iordanov, Growth Processes of the Anodic Crystalline Layer on Potentiostatic Oxidation of Lead in Sulfuric Acid. J ELECTROCHEM SOC. 117 (1970) 1103-1109.

DOI: https://doi.org/10.1149/1.2407747

[11] D. Pavlov, Processes in solid state at anodic oxidation of a lead electrode in H2SO4 solution and their dependence on the oxide structure and properties. Electrochim Acta. 23(9) (1978) 845-854.

DOI: https://doi.org/10.1016/0013-4686(78)87005-4