Universal Journal of Chemistry(CEASE PUBLICATION) Vol. 2(5), pp. 76 - 85
DOI: 10.13189/ujc.2014.020502
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Effect of Phase Composition on the Anodic Dissolution and Passivation of Zinc-based Alloys

Viktor I. Korobov , Lina V. Petrenko ^*, Veronika V. Poltavets
Department of Chemistry, Oles Honchar Dnipropetrovsk National University, 49010 Dnipropetrovsk, Ukraine

ABSTRACT

The influence of phase composition on the anodic behavior of electrolytic zinc-based alloys in alkaline solutions was investigated. The following materials were studied: Zn-Sn alloys consisting solely of Zn and Sn crystallites in a mechanical mixture, Zn-Fe, Zn-Co, and Zn-Ni alloys consisting of both solid solutions and intermetallic compounds. The anodic behavior of low-alloy solid solutions is similar to that of pure Zn. Solid-solution alloys consisting of an-phase had a distinctive feature: the descent of the anode current prior to the complete passivation takes place at more positive potentials compared to pure zinc and its mechanical mixtures. The same sequence of anodic dissolution and passivation of zinc alloys as for the pure zinc anode polarization were observed during anodic polarization of both solid solutions and intermetallic phases of zinc alloys. Alloying led to a change in the thermodynamic and kinetic characteristics of anodic processes. Typical peaks of anodic behavior of Zn and Sn were observed on the voltammetry curves of a broad range of heterogeneous Zn-Sn alloys. Peak currents depended on the alloy composition. The dependence between the alloy phase composition and the corresponding electrochemical behavior can be used in determination of the phase composition.

KEYWORDS
Electrolytic Zinc Alloys, Phase Composition, Anodic Behavior, Alkaline Solutions

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Viktor I. Korobov , Lina V. Petrenko , Veronika V. Poltavets , "Effect of Phase Composition on the Anodic Dissolution and Passivation of Zinc-based Alloys," Universal Journal of Chemistry(CEASE PUBLICATION), Vol. 2, No. 5, pp. 76 - 85, 2014. DOI: 10.13189/ujc.2014.020502.

(b). APA Format:
Viktor I. Korobov , Lina V. Petrenko , Veronika V. Poltavets (2014). Effect of Phase Composition on the Anodic Dissolution and Passivation of Zinc-based Alloys. Universal Journal of Chemistry(CEASE PUBLICATION), 2(5), 76 - 85. DOI: 10.13189/ujc.2014.020502.