THE INHIBITION EFFECT OF ZINC AND SILICATE IONS ON PITTING CORROSION INDUCED BY CERIUM(III) IONS OF CARBON STEEL IN SODIUM CHLORIDE SOLUTION

Qiongwei Li ()
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Qiongwei Li: State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, P. R. China

Surface Review and Letters (SRL), 2021, vol. 28, issue 01, 1-15

Abstract: Pitting corrosion of carbon steel in sodium chloride solution induced by Ce3+ and the synergistic inhibition effects of Ce3+ and Zn2+/SiO32− were investigated using in-situ observation and electrochemical methods. The results showed that the presence of Ce3+ could result in severe pitting corrosion and a positive shift in the corrosion potential. It was found that individual Ce3+, Zn2+, or SiO32− had low inhibition efficiencies, whereas the combination of Ce3+ and Zn2+ or SiO32− proved to be highly effective in inhibiting the development of pits in two different ways and in enhancing the corrosion resistance. The pitting corrosion and inhibition mechanisms were discussed based on the results.

Keywords: Carbon steel; pitting corrosion; precipitation inhibitor; potentiodynamic polarization; EIS (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X20500389

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