Effect of sulphide on the corrosion behaviour of AISI 316L stainless steel and its constituent elements in simulated Kraft digester conditions

Iva Betova, Martin Bojinov*, Outi Hyökyvirta, Timo Saario

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    54 Citations (Scopus)

    Abstract

    The electrochemical behaviour of AISI 316L steel and its constituent metals in simulated Kraft digester white liquor at 170 °C has been studied by registering slow scan rate voltammograms and impedance spectra at the corrosion potential. Interpretation of the results in terms of two approaches – the Mixed-Conduction Model for passive films and a two-step dissolution reaction – allowed for the estimation of corrosion currents and polarisation resistances as depending on the material and electrolyte medium. Tentative conclusions on the effect of sulphur-containing species in the white liquor on the corrosion mechanism of the studied materials are drawn.
    Original languageEnglish
    Pages (from-to)1499-1507
    JournalCorrosion Science
    Volume52
    Issue number4
    DOIs
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Stainless steel
    • Cyclic voltammetry
    • EIS
    • Passive films
    • Reactor conditions

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