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Electrochemical hydrogen charging of duplex stainless steel

Journal Contribution - Journal Article

This study evaluates the electrochemical hydrogen charging behavior and interaction between hydrogen and the microstructure of a duplex stainless steel. A saturation level of approximately 650 wppm is reached after 10 d of charging. The data are compared with a model resulting in a diffusion coefficient of 2.1 × 10−14 m2/s. A two-step increase of the concentration is observed and ascribed to saturation of ferrite followed by charging of austenite grains. Microstructural changes are observed during charging, i.e., formation and interaction of dislocations, as a result of the high residual stresses inherent to the production process of duplex stainless steels.

Journal: Corrosion
ISSN: 0010-9312
Issue: 8
Volume: 75
Pages: 880-887
Publication year:2019
Keywords:Diffusion, Duplex stainless steels, Hydrogen absorption, Plastic deformation
CSS-citation score:2
Accessibility:Open