Oxygen-enhanced dissolution corrosion of austenitic stainless steel 316 L in static lead-bismuth eutectic at 500 °C

Eloa Lopes Maia, Aleksandr Tsybanev, Serguei Gavrilov, Valentyn Tsisar, Jun Lim, Iris De Graeve

    Research outputpeer-review

    Abstract

    The corrosion process of 316 L austenitic stainless steel in liquid lead-bismuth eutectic at 500°C with dissolved oxygen concentrations ranging from below 10−11 to 10−5 wt% was investigated. The maximum dissolution corrosion damage and the highest oxygen consumption during the experiments occurred at intermediate dissolved oxygen concentrations (10−7 and 10−6 wt%). An assumption of a governing role of Fe3O4 equilibrium and diffusion-limited processes on the steel surface explains quantitatively this observation. The proposed mechanism suggests that oxygen-enhanced dissolution is a result of the combination of solid steel dissolution and the oxidation of dissolved steel constituents in the liquid metal bulk.

    Original languageEnglish
    Article number112224
    Number of pages9
    JournalCorrosion Science
    Volume236
    DOIs
    StatePublished - 1 Aug 2024

    ASJC Scopus subject areas

    • General Chemistry
    • General Chemical Engineering
    • General Materials Science

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