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    Effect of nickel on hydrogen permeation in ferritic/pearlitic low alloy steels

    Access Status
    Fulltext not available
    Authors
    Iannuzzi, Mariano
    Husby, H.
    Johnsen, R.
    Kappes, M.
    Barnoush, A.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Iannuzzi, M. and Husby, H. and Johnsen, R. and Kappes, M. and Barnoush, A. 2018. Effect of nickel on hydrogen permeation in ferritic/pearlitic low alloy steels. International Journal of Hydrogen Energy. 43 (7): pp. 3845-3861.
    Source Title
    International Journal of Hydrogen Energy
    DOI
    10.1016/j.ijhydene.2017.12.174
    URI
    http://hdl.handle.net/20.500.11937/65548
    Collection
    • Curtin Research Publications
    Abstract

    Nickel offers several beneficial effects as an alloying element to low alloy steels. However, it is, in the oil and gas industry, limited by part 2 of the ISO 15156 standard to a maximum of 1 wt% due to sulfide stress cracking resistance concerns. Hydrogen uptake, diffusion, and trapping were investigated in research-grade ferritic/pearlitic low alloy steels with Ni contents of 0, 1, 2 and 3 wt% by the electrochemical permeation method as a function of temperature and hydrogen charging conditions. Qualitatively, the effective diffusion coefficient, Deff, decreased with increasing Ni content. The sub-surface lattice hydrogen concentration, C0, decreased with increasing Ni content in all charging conditions while the trend between the sub-surface hydrogen concentration in lattice and reversible trap sites, COR, and Ni content varied with the charging conditions. Irreversible trapping, evaluated by consecutive charging transients, was not observed for any of the materials. Lastly, the possible influence of an increasing fraction of pearlite with increasing Ni content is discussed.

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