Passive film growth and oxide layer restructuring on stainless steel in a high-temperature borate electrolyte

Martin Bojinov (Corresponding author), Petri Kinnunen, Klas Lundgren, Gunnar Wikmark

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    The oxide films formed on AISI 316L(NG) in the temperature range 150-300°C in a simulated light water reactor coolant have been characterised by impedance spectroscopy and ex-situ analysis using Auger electron spectroscopy. The results show that the nature of the barrier layer does not change drastically with temperature, although the growth mechanism of the oxide film is different at 150…300°C than at room temperature. A procedure for the calculation of the kinetic constants of the interfacial reactions, as well as the diffusion coefficients of ionic / electronic defects in the oxide has been developed on the basis of the Mixed-Conduction Model for passive films. The effect of temperature on the parameters has been quantified, and their relevance for the corrosion behaviour of stainless steel in a high-temperature electrolyte is discussed.
    Original languageEnglish
    Title of host publicationPassivation of Metals and Semiconductors, and Properties of Thin Oxide Layers
    Subtitle of host publicationA Selection of Papers from the 9th International Symposium
    EditorsPhilippe Marcus, Vincent Maurice
    Place of PublicationOxford
    PublisherElsevier
    Pages397-402
    ISBN (Print)978-0-444-52224-5
    DOIs
    Publication statusPublished - 2006
    MoE publication typeA4 Article in a conference publication
    Event9th International Symposium on the Passivation of Metals and Semiconductors and the Properties of Thin Oxide Layers, PASSIVITY-9 - Paris, France
    Duration: 27 Jun 20051 Jul 2005
    Conference number: 9

    Conference

    Conference9th International Symposium on the Passivation of Metals and Semiconductors and the Properties of Thin Oxide Layers, PASSIVITY-9
    Abbreviated titlePASSIVITY-9
    Country/TerritoryFrance
    CityParis
    Period27/06/051/07/05

    Keywords

    • stainless steel
    • passive film
    • light water reactor coolant
    • high-temperature borate electrolyte
    • impedance spectroscopy
    • ex-situ analysis
    • conduction mechanism
    • kinetic model

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