Review of Hydrogen Embrittlement in Metals: Hydrogen Diffusion, Hydrogen Characterization, Hydrogen Embrittlement Mechanism and Prevention
Xinfeng Li1,2(), Xianfeng Ma1, Jin Zhang3, Eiji Akiyama4, Yanfei Wang5(), Xiaolong Song2

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Fig.1. a Hydrogen fugacity (fH2) for pure iron in 0.1 M NaOH with different additions of KCN [33]; b total hydrogen concentration of the 3.5NiCrMoV specimens charged electrochemically with hydrogen plotted to fit the regression line for charging in gaseous hydrogen [34]