Effect of lead and applied potential on corrosion of carbon steel in steam generator crevice solutions

Martin Bojinov; Essi Jäppinen; Timo Saario; Konsta Sipilä; Aki Toivonen

doi:10.1016/j.corsci.2019.108117

Effect of lead and applied potential on corrosion of carbon steel in steam generator crevice solutions

Martin Bojinov (Corresponding Author), Essi Jäppinen, Timo Saario, Konsta Sipilä, Aki Toivonen

BA2F04 Nuclear reactor materials

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

General corrosion behavior and stress corrosion cracking (SCC) susceptibility of carbon steel in simulated steam generator crevices are probed by voltammetry and electrochemical impedance spectroscopy, coupled to ex-situ characterization of the formed oxides and slow strain rate tests. Impedance spectra are interpreted using the Mixed-Conduction Model allowing for the extraction of oxidation and corrosion release rates. The results indicate a beneficial effect of lead on both general corrosion and SCC susceptibility of carbon steel near the corrosion potential. At anodic potentials, the negative effect of Pb on localized corrosion susceptibility is secondary to that of the applied potential.

Original language	English
Article number	108117
Journal	Corrosion Science
Volume	159
DOIs	https://doi.org/10.1016/j.corsci.2019.108117
Publication status	Published - 1 Oct 2019
MoE publication type	A1 Journal article-refereed

Keywords

Carbon steel
Electrochemical impedance spectroscopy
General corrosion
Steam generator
Stress-corrosion cracking

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10.1016/j.corsci.2019.108117

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Bojinov, M., Jäppinen, E., Saario, T., Sipilä, K., & Toivonen, A. (2019). Effect of lead and applied potential on corrosion of carbon steel in steam generator crevice solutions. Corrosion Science, 159, [108117]. https://doi.org/10.1016/j.corsci.2019.108117

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abstract = "General corrosion behavior and stress corrosion cracking (SCC) susceptibility of carbon steel in simulated steam generator crevices are probed by voltammetry and electrochemical impedance spectroscopy, coupled to ex-situ characterization of the formed oxides and slow strain rate tests. Impedance spectra are interpreted using the Mixed-Conduction Model allowing for the extraction of oxidation and corrosion release rates. The results indicate a beneficial effect of lead on both general corrosion and SCC susceptibility of carbon steel near the corrosion potential. At anodic potentials, the negative effect of Pb on localized corrosion susceptibility is secondary to that of the applied potential.",

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AU - Toivonen, Aki

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AB - General corrosion behavior and stress corrosion cracking (SCC) susceptibility of carbon steel in simulated steam generator crevices are probed by voltammetry and electrochemical impedance spectroscopy, coupled to ex-situ characterization of the formed oxides and slow strain rate tests. Impedance spectra are interpreted using the Mixed-Conduction Model allowing for the extraction of oxidation and corrosion release rates. The results indicate a beneficial effect of lead on both general corrosion and SCC susceptibility of carbon steel near the corrosion potential. At anodic potentials, the negative effect of Pb on localized corrosion susceptibility is secondary to that of the applied potential.

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