8Louthan M R, Gaskey G T, Donovan J A, et al. Hydrogen embrittlement of metals [J]. Mater Sci Eng, 1972,10 : 357- 368.
9Zakroczymski T. Entry transport and absorption of hydrogen in low temperature plasma nitrided austenitic stainless steel[J]. Corrosion, 1985,41 : 485-498.