Hydrostatic pressure effects on hydrogen permeation in {A514} steel during galvanostatic hydrogen charging
By Xiong, X. L.; Tao, X.; Zhou, Q. J.; Li, J. X.; Volinsky, Alex A.; Su, Y. J.
Published in Corrosion Science
NULL
2016
Abstract
Abstract {A514} offshore structural steel was exposed to hydrostatic pressure ranging from 0.1 to 40 {MPa} to examine hydrogen permeation during galvanostatic hydrogen charging. Hydrostatic pressure decreases the energy barrier for hydrogen absorption and desorption, while increasing hydrogen adsorption. These effects are induced by both steady-state current density and the apparent diffusivity slight increase with hydrostatic pressure. Taking surface effect of hydrogen permeation into account, the intrinsic diffusivity of (3.2
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