Fig. 2
From: Inhibiting hydrogen embrittlement in ultra-strong steels for automotive applications by Ni-alloying
a Compositional depth-profile, as analyzed by AES, of the as-polished N3. b EIS Nyquist plots of N1 and N3 measured immediately after immersion in a Walpole solution of 0.2 M CH3COONa + 0.185 M HCl. c Electrochemical hydrogen permeation transients with apparent H-diffusivity values (Dapp), measured under an applied cathodic current density of 1 mA cm−2 in a 3.5% NaCl + 0.3% NH4SCN solution in the H-charging side, and applied anodic potential of 270 mVSCE in a 0.1 M NaOH solution in the H-detection side
