Electrochemical Studies on the Corrosion Behavior of Mild Steel in NaCl Aqueous Solutions with  Zinc Ions

Md. Saiful Islam; Masatoshi Sakairi

Research Article Open access CC BY 4.0

Electrochemical Studies on the Corrosion Behavior of Mild Steel in NaCl Aqueous Solutions with Zinc Ions

Journal of Materials Science Research and Reviews · pp. 66–78 · Published 4 Feb 2021

Abstract

The corrosion behaviors of mild steel in NaCl aqueous solution with different Zn2+ concentrations have been investigated electrochemically. The immersion potentials were influenced by the presence of Zn2+ and shifted to the positive direction with increasing the Zn2+ concentration in the solutions. Zn2+ suppressed the current density in both cathodic and anodic polarization, and the inhibition effects increased with increasing the Zn2+ concentrations. The electrochemical impedance spectroscopy (EIS) results showed the highest charge transfer resistance in the Zn-rich solution due to the formation of Zn-layer with the steel surface. The Zn-layer thickness increased, and the area of defects in the oxide film on the steel surface decreased with increasing the Zn2+ concentration. Therefore, it was suggested that the corrosion inhibition ability of mild steel in NaCl aqueous solution significantly improved with increasing the concentration of Zn2+ in the solution.

Mild steel corrosion electrochemical test polarization EIS.

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Md. Saiful Islam, Masatoshi Sakairi (2021). Electrochemical Studies on the Corrosion Behavior of Mild Steel in NaCl Aqueous Solutions with Zinc Ions. Journal of Materials Science Research and Reviews , 66–78.

Affiliations

Md. Saiful Islam — Department of Applied Chemistry and Chemical Engineering, University of Rajshahi, Rajshahi-6205, Bangladesh and Graduate School of Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan.
Masatoshi Sakairi — Faculty of Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan.

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