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Page 6 of 27 Liu et al. Microstructures 2023;3:2023020 https://dx.doi.org/10.20517/microstructures.2023.02
Figure 2. Evolution of the passive film on 2,205 duplex stainless steel [25] . (Open access). (A) The surface morphology changes within
600 min and (B) a schematic diagram of the passive film evolution.
Hydrostatic pressure is inevitable when considering the use of deep-sea counterparts. On the one hand,
hydrostatic pressure decreases the Nyquist impedance and Cr O proportion of the passive film
2
3
[Figure 4D] . These changes indicate that hydrostatic pressure may reduce the compactness of the passive
[37]
film . On the other hand, potentiodynamic results show that hydrostatic pressure promotes the hydrogen
[37]
evolution reaction by accelerating hydrogen adsorption on the metal surface and inhibiting the transfer of
H molecules . However, the changes to the passive film due to hydrostatic pressure have not been
[37]
2
adequately investigated. Therefore, elucidating the relationship between the changes in the passive film and
the hydrogen evolution reaction may help clarify the mechanism. Cui et al. used the High Field Model and
