ELECTROCHEMICAL BEHAVIOR OF ZINC ANODE IN ACIDIC ZINC ELECTROLYTE - INFLUENCE OF LEAD AS AN IMPURITY IN ZINC ANODIC DISSOLUTION

Authors

  • Habiba Kherrab-Boukezzata University of Boumerdes, Faculty of Science, Chemistry Department, 35000, Algeria
  • Naima Ghemmit-Doulache University of Boumerdes, Fibrous Polymers Treatment and Forming Laboratory, Faculty of Technology, 35000, Algeria
  • Moussa Bounoughaz Laboratory of Metallurgy, Nuclear Research Center of Draria, Algiers Algeria
  • Slimane Boutarfaia Laboratory of Metallurgy, Nuclear Research Center of Draria, Algiers Algeria

DOI:

https://doi.org/10.4314/jfas.1142

Keywords:

Zinc electrorefining process, impurity, pure Zn and Zn-1 % wt. Pb anodes, acidic solution, microstructure, anodic corrosion behaviours, passivation.

Abstract

Zinc is common metal used for steel protection. In this work, an alloy Zn-1 % wt. Pb was prepared by fusion at 500°C. The analysis of the corrosion behavior was studied with pure Zn anode as control in aerated solution of 0.9 M ZnSO4.7H2O + 1.63 M H2SO4 at 38°C.The effect of lead impurity on corrosion resistance of zinc anode in zinc electrorefining process was investigated using open circuit potential (OCP), Tafel plots, chronoamperometry at imposed constant anodic potential and electrochemical impedance spectroscopy (EIS) techniques. Samples were characterized by chemical analysis, optic microscope (OM) and X-ray diffraction (XRD). The results show that the lead impurity leads to degradation of the behavior of the alloy due to negative effect on the microstructure. Lead increases the corrosion rate and decreases the corrosion resistance of Zn-1 % wt. Pb alloy.

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Author Biography

Moussa Bounoughaz, Laboratory of Metallurgy, Nuclear Research Center of Draria, Algiers Algeria

This author is retired (no more permanent).

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Published

2022-04-30

How to Cite

KHERRAB-BOUKEZZATA, H.; GHEMMIT-DOULACHE, N.; BOUNOUGHAZ, M.; BOUTARFAIA, S. ELECTROCHEMICAL BEHAVIOR OF ZINC ANODE IN ACIDIC ZINC ELECTROLYTE - INFLUENCE OF LEAD AS AN IMPURITY IN ZINC ANODIC DISSOLUTION. Journal of Fundamental and Applied Sciences, [S. l.], v. 14, n. 2, p. 391–416, 2022. DOI: 10.4314/jfas.1142. Disponível em: https://www.jfas.info/index.php/JFAS/article/view/1142. Acesso em: 30 jan. 2023.

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