info:eu-repo/semantics/article
Effect of nickel on hydrogen permeation in ferritic/pearlitic low alloy steels
Fecha
2018-02Registro en:
Husby, Hans; Iannuzzi, Mariano; Johnsen, Roy; Kappes, Mariano Alberto; Barnoush, Afrooz; Effect of nickel on hydrogen permeation in ferritic/pearlitic low alloy steels; Pergamon-Elsevier Science Ltd; International Journal of Hydrogen Energy; 43; 7; 2-2018; 3845-3861
0360-3199
CONICET Digital
CONICET
Autor
Husby, Hans
Iannuzzi, Mariano
Johnsen, Roy
Kappes, Mariano Alberto
Barnoush, Afrooz
Resumen
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.