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

    Research output: Contribution to journalArticleScientificpeer-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 languageEnglish
    Article number108117
    JournalCorrosion Science
    Volume159
    DOIs
    Publication statusPublished - 1 Oct 2019
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Steam generators
    Carbon steel
    Lead
    Corrosion
    Stress corrosion cracking
    Voltammetry
    Electrochemical impedance spectroscopy
    Oxides
    Strain rate
    Oxidation

    Keywords

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

    Cite this

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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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    Effect of lead and applied potential on corrosion of carbon steel in steam generator crevice solutions. / Bojinov, Martin (Corresponding Author); Jäppinen, Essi; Saario, Timo; Sipilä, Konsta; Toivonen, Aki.

    In: Corrosion Science, Vol. 159, 108117, 01.10.2019.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    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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