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^*, Essi Jäppinen, Timo Saario, Konsta Sipilä, Aki Toivonen

^*Corresponding author for this work

University of Chemical Technology and Metallurgy

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

11 Citations (Scopus)

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

Funding

The funding of this work by the SAFIR 2018 Finnish Research Program on Nuclear Power Plant Safety (2014–2018) is gratefully acknowledged.

Keywords

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

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title = "Effect of lead and applied potential on corrosion of carbon steel in steam generator crevice solutions",

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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T1 - Effect of lead and applied potential on corrosion of carbon steel in steam generator crevice solutions

AU - Bojinov, Martin

AU - Jäppinen, Essi

AU - Saario, Timo

AU - Sipilä, Konsta

AU - Toivonen, Aki

PY - 2019/10/1

Y1 - 2019/10/1

N2 - 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.

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.

KW - Carbon steel

KW - Electrochemical impedance spectroscopy

KW - General corrosion

KW - Steam generator

KW - Stress-corrosion cracking

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VL - 159

JO - Corrosion Science

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ER -

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

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Keywords

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