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Review of Hydrogen Embrittlement in Metals: Hydrogen Diffusion, Hydrogen Characterization, Hydrogen Embrittlement Mechanism and Prevention
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Xinfeng Li, Xianfeng Ma, Jin Zhang, Eiji Akiyama, Yanfei Wang, Xiaolong Song
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Table 1 Activation energies of various hydrogen traps in steels [3]
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| Trapping sites | Activation energy (kJ mol-1) | | Reversible trapping sites | | Interstitial sites in iron | 4-8 | | Dislocation | 26.4-26.8 | | Lath boundary | 17.8-18.6 | | Austenite/martensite | 22 | | Grain boundary | 17.8-18.6 | | NbC (coherent) | 39-48 | | Irreversible trapping sites | | Ferrite/cementite interface | 66.3-68.4 | | Fe3C interface | 84 | | Al2O3 interface | 79 | | MnS interface | 72 | | NbC (incoherent) | 63-68 |
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