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Hydrogen Embrittlement of Nickel Alloy Steels

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We are working on a new review paper on hydrogen embrittlement and sulfide stress cracking (SSC) of nickel-containing low alloy steels (also referred to as nickel alloy steels). Here is a snapshot of one of the figures.

 

SSC nickel LAS
SSC initiation and propagation  mechanism for low and nickel alloy steels  involving transition from active path corrosion (APC) to hydrogen embrittlement (HE). Tensile stress, σ, could be externally applied or a result of residual stresses. After [1].

Where:

Term  Definition  
APC Active Path Corrosion (i.e. pitting corrosion)
HE    Hydrogen Embrittlement

References

  1. Y. Yamane, N. Totsuka, M. Kimura, T. Kurisu, K. Motoda, Y. Nakai, “Effect of Ni on sulfide stress corrosion cracking in low alloy steels”, CORROSION/86, (NACE International, Houston, TX): 1986, Paper 167.