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Hydrogen release from carbon steel in chloride solution under anodic polarization
Journal article   Peer reviewed

Hydrogen release from carbon steel in chloride solution under anodic polarization

Yanliang Huang, Xiangju Liu, Qichao Zhang, Yong Xu, Hans-Jorg Kunte and Roland De Marco
International Journal of Hydrogen Energy, Vol.45(4), pp.3307-3315
2020
DOI: https://doi.org/10.1016/j.ijhydene.2019.11.218
url
https://doi.org/10.1016/j.ijhydene.2019.11.218View
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Abstract

carbon steel polarization hydrogen permeation anodic dissolution
The hydrogen permeation current increase was noticed for carbon steel in 0.5 mol/L NaCl solution under strong anodic potentials, which is contrary to the common understanding. Hydrogen permeation under cathodic potentials has been widely studied because of possible hydrogen embrittlement failures of high strength steels in seawater, but investigations of anodic polarization on hydrogen permeation are fairly rare, as the hydrogen evolution reaction shall be retarded. To corroborate the observed phenomenon, experiments were conducted using both as-received and vacuum-annealed sheet specimens. It was verified that the observed phenomena originated from the released hydrogen in traps by metal dissolution under anodic polarization.

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