Kinetic parameters of the oxidation of zirconium alloys in simulated WWER water: Effect of KOH content

Martin Bojinov (Corresponding Author), Wei Cai, Petri Kinnunen, Timo Saario

    Research output: Contribution to journalArticleScientificpeer-review

    7 Citations (Scopus)

    Abstract

    The pre-transition oxides formed on two different types of zirconium alloys (Zircaloy 4 and E110) have been characterised in situ using electrochemical impedance spectroscopy (EIS) in high-temperature electrolyte simulating WWER conditions at 310 °C. To obtain a correlation between the oxide film thickness, the oxide growth rate and the impedance parameters, the EIS data have been fitted to a transfer function derived from the mixed-conduction model for oxide films, allowing for the contribution of both an inner, barrier type of oxide and a more defective outer layer. The values of the total oxide film thickness based on the model calculations have proved to be in a good agreement with the values measured from the cross-section micrographs of the specimens using scanning electron microscopy. The main kinetic and transport parameters characterising the oxidation process have been estimated and discussed with regard to the effect of KOH content and alloy type on the mechanism of conduction through the formed oxide.
    Original languageEnglish
    Pages (from-to)45 - 54
    Number of pages10
    JournalJournal of Nuclear Materials
    Volume378
    Issue number1
    DOIs
    Publication statusPublished - 2008
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    zirconium alloys
    Zirconium alloys
    Kinetic parameters
    Oxides
    Oxide films
    oxide films
    Oxidation
    oxidation
    oxides
    Water
    kinetics
    impedance
    Electrochemical impedance spectroscopy
    water
    Film thickness
    film thickness
    conduction
    transfer functions
    spectroscopy
    Electrolytes

    Keywords

    • zirconium alloys
    • nuclear reactors
    • fuel cladding corrosion
    • anodic oxide film
    • oxidation
    • oxide films
    • PWR
    • WWER

    Cite this

    @article{12976ac8756a49f7a31ec7050a064176,
    title = "Kinetic parameters of the oxidation of zirconium alloys in simulated WWER water: Effect of KOH content",
    abstract = "The pre-transition oxides formed on two different types of zirconium alloys (Zircaloy 4 and E110) have been characterised in situ using electrochemical impedance spectroscopy (EIS) in high-temperature electrolyte simulating WWER conditions at 310 °C. To obtain a correlation between the oxide film thickness, the oxide growth rate and the impedance parameters, the EIS data have been fitted to a transfer function derived from the mixed-conduction model for oxide films, allowing for the contribution of both an inner, barrier type of oxide and a more defective outer layer. The values of the total oxide film thickness based on the model calculations have proved to be in a good agreement with the values measured from the cross-section micrographs of the specimens using scanning electron microscopy. The main kinetic and transport parameters characterising the oxidation process have been estimated and discussed with regard to the effect of KOH content and alloy type on the mechanism of conduction through the formed oxide.",
    keywords = "zirconium alloys, nuclear reactors, fuel cladding corrosion, anodic oxide film, oxidation, oxide films, PWR, WWER",
    author = "Martin Bojinov and Wei Cai and Petri Kinnunen and Timo Saario",
    year = "2008",
    doi = "10.1016/j.jnucmat.2008.04.014",
    language = "English",
    volume = "378",
    pages = "45 -- 54",
    journal = "Journal of Nuclear Materials",
    issn = "0022-3115",
    publisher = "Elsevier",
    number = "1",

    }

    Kinetic parameters of the oxidation of zirconium alloys in simulated WWER water : Effect of KOH content. / Bojinov, Martin (Corresponding Author); Cai, Wei; Kinnunen, Petri; Saario, Timo.

    In: Journal of Nuclear Materials, Vol. 378, No. 1, 2008, p. 45 - 54.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Kinetic parameters of the oxidation of zirconium alloys in simulated WWER water

    T2 - Effect of KOH content

    AU - Bojinov, Martin

    AU - Cai, Wei

    AU - Kinnunen, Petri

    AU - Saario, Timo

    PY - 2008

    Y1 - 2008

    N2 - The pre-transition oxides formed on two different types of zirconium alloys (Zircaloy 4 and E110) have been characterised in situ using electrochemical impedance spectroscopy (EIS) in high-temperature electrolyte simulating WWER conditions at 310 °C. To obtain a correlation between the oxide film thickness, the oxide growth rate and the impedance parameters, the EIS data have been fitted to a transfer function derived from the mixed-conduction model for oxide films, allowing for the contribution of both an inner, barrier type of oxide and a more defective outer layer. The values of the total oxide film thickness based on the model calculations have proved to be in a good agreement with the values measured from the cross-section micrographs of the specimens using scanning electron microscopy. The main kinetic and transport parameters characterising the oxidation process have been estimated and discussed with regard to the effect of KOH content and alloy type on the mechanism of conduction through the formed oxide.

    AB - The pre-transition oxides formed on two different types of zirconium alloys (Zircaloy 4 and E110) have been characterised in situ using electrochemical impedance spectroscopy (EIS) in high-temperature electrolyte simulating WWER conditions at 310 °C. To obtain a correlation between the oxide film thickness, the oxide growth rate and the impedance parameters, the EIS data have been fitted to a transfer function derived from the mixed-conduction model for oxide films, allowing for the contribution of both an inner, barrier type of oxide and a more defective outer layer. The values of the total oxide film thickness based on the model calculations have proved to be in a good agreement with the values measured from the cross-section micrographs of the specimens using scanning electron microscopy. The main kinetic and transport parameters characterising the oxidation process have been estimated and discussed with regard to the effect of KOH content and alloy type on the mechanism of conduction through the formed oxide.

    KW - zirconium alloys

    KW - nuclear reactors

    KW - fuel cladding corrosion

    KW - anodic oxide film

    KW - oxidation

    KW - oxide films

    KW - PWR

    KW - WWER

    U2 - 10.1016/j.jnucmat.2008.04.014

    DO - 10.1016/j.jnucmat.2008.04.014

    M3 - Article

    VL - 378

    SP - 45

    EP - 54

    JO - Journal of Nuclear Materials

    JF - Journal of Nuclear Materials

    SN - 0022-3115

    IS - 1

    ER -