Effect of chloride on the oxides on low-alloyed steel in conditions of a lightwater reactor pressure vessel cladding flaw

M Bojinov (Corresponding Author), E Nowak, Timo Saario, Konsta Sipilä, M Stanislowski

    Research output: Contribution to journalArticleScientificpeer-review

    6 Citations (Scopus)

    Abstract

    Strain-induced corrosion cracking in low alloyed steels has been extensively investigated during the last decades. One finding from recent investigations is that small amounts of chlorides tend to increase the cracking susceptibility of such materials. The present paper investigates the effect of chloride addition on oxide films on low-alloyed steel in conditions simulating those in a cladding flaw of a light water reactor pressure vessel under oxygenated high-temperature water conditions. The films were studied by in-situ electrochemical impedance spectroscopy andmixed potential measurements, coupled to ex-situ characterization of the formed oxides by microscopic and surface analytical techniques. The impedance data were quantitatively interpreted by themixed-conductionmodel for oxide films to yield estimates for the main kinetic and transport parameters of oxide growth and restructuring. On the basis of the experimental data and calculation results, it can be concluded that the effect of chloride on low-alloyed steel oxide is moderate, concerns mostly the processes at the inner layer/coolant interface and is to a major extent reversible
    Original languageEnglish
    Pages (from-to)C177-C187
    JournalJournal of the Electrochemical Society
    Volume161
    Issue number4
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Steel
    Pressure vessels
    Oxides
    Chlorides
    Defects
    Oxide films
    Light water reactors
    Stress corrosion cracking
    Electrochemical impedance spectroscopy
    Coolants
    Kinetics
    Water
    Temperature

    Keywords

    • Low-alloyed steel
    • boiling water reactor
    • cladding flaw
    • chloride addition
    • electrochemical impedance spectroscopy
    • kinetic model

    Cite this

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    title = "Effect of chloride on the oxides on low-alloyed steel in conditions of a lightwater reactor pressure vessel cladding flaw",
    abstract = "Strain-induced corrosion cracking in low alloyed steels has been extensively investigated during the last decades. One finding from recent investigations is that small amounts of chlorides tend to increase the cracking susceptibility of such materials. The present paper investigates the effect of chloride addition on oxide films on low-alloyed steel in conditions simulating those in a cladding flaw of a light water reactor pressure vessel under oxygenated high-temperature water conditions. The films were studied by in-situ electrochemical impedance spectroscopy andmixed potential measurements, coupled to ex-situ characterization of the formed oxides by microscopic and surface analytical techniques. The impedance data were quantitatively interpreted by themixed-conductionmodel for oxide films to yield estimates for the main kinetic and transport parameters of oxide growth and restructuring. On the basis of the experimental data and calculation results, it can be concluded that the effect of chloride on low-alloyed steel oxide is moderate, concerns mostly the processes at the inner layer/coolant interface and is to a major extent reversible",
    keywords = "Low-alloyed steel, boiling water reactor, cladding flaw, chloride addition, electrochemical impedance spectroscopy, kinetic model",
    author = "M Bojinov and E Nowak and Timo Saario and Konsta Sipil{\"a} and M Stanislowski",
    note = "Project code: 85630",
    year = "2014",
    doi = "10.1149/2.004404jes",
    language = "English",
    volume = "161",
    pages = "C177--C187",
    journal = "Journal of the Electrochemical Society",
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    Effect of chloride on the oxides on low-alloyed steel in conditions of a lightwater reactor pressure vessel cladding flaw. / Bojinov, M (Corresponding Author); Nowak, E; Saario, Timo; Sipilä, Konsta; Stanislowski, M.

    In: Journal of the Electrochemical Society, Vol. 161, No. 4, 2014, p. C177-C187.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Effect of chloride on the oxides on low-alloyed steel in conditions of a lightwater reactor pressure vessel cladding flaw

    AU - Bojinov, M

    AU - Nowak, E

    AU - Saario, Timo

    AU - Sipilä, Konsta

    AU - Stanislowski, M

    N1 - Project code: 85630

    PY - 2014

    Y1 - 2014

    N2 - Strain-induced corrosion cracking in low alloyed steels has been extensively investigated during the last decades. One finding from recent investigations is that small amounts of chlorides tend to increase the cracking susceptibility of such materials. The present paper investigates the effect of chloride addition on oxide films on low-alloyed steel in conditions simulating those in a cladding flaw of a light water reactor pressure vessel under oxygenated high-temperature water conditions. The films were studied by in-situ electrochemical impedance spectroscopy andmixed potential measurements, coupled to ex-situ characterization of the formed oxides by microscopic and surface analytical techniques. The impedance data were quantitatively interpreted by themixed-conductionmodel for oxide films to yield estimates for the main kinetic and transport parameters of oxide growth and restructuring. On the basis of the experimental data and calculation results, it can be concluded that the effect of chloride on low-alloyed steel oxide is moderate, concerns mostly the processes at the inner layer/coolant interface and is to a major extent reversible

    AB - Strain-induced corrosion cracking in low alloyed steels has been extensively investigated during the last decades. One finding from recent investigations is that small amounts of chlorides tend to increase the cracking susceptibility of such materials. The present paper investigates the effect of chloride addition on oxide films on low-alloyed steel in conditions simulating those in a cladding flaw of a light water reactor pressure vessel under oxygenated high-temperature water conditions. The films were studied by in-situ electrochemical impedance spectroscopy andmixed potential measurements, coupled to ex-situ characterization of the formed oxides by microscopic and surface analytical techniques. The impedance data were quantitatively interpreted by themixed-conductionmodel for oxide films to yield estimates for the main kinetic and transport parameters of oxide growth and restructuring. On the basis of the experimental data and calculation results, it can be concluded that the effect of chloride on low-alloyed steel oxide is moderate, concerns mostly the processes at the inner layer/coolant interface and is to a major extent reversible

    KW - Low-alloyed steel

    KW - boiling water reactor

    KW - cladding flaw

    KW - chloride addition

    KW - electrochemical impedance spectroscopy

    KW - kinetic model

    U2 - 10.1149/2.004404jes

    DO - 10.1149/2.004404jes

    M3 - Article

    VL - 161

    SP - C177-C187

    JO - Journal of the Electrochemical Society

    JF - Journal of the Electrochemical Society

    SN - 0013-4651

    IS - 4

    ER -