期刊
HELIYON
卷 2, 期 12, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.heliyon.2016.e00209
关键词
Engineering; Materials Science
资金
- Ecole Nationale Superieure de Chimie de Paris, Centre National de la Recherche Scientifique (ENSCP-CNRS)
- Australia Endeavour Award Research Fellowship
- US Air Force Academy [FA7000-13-2-0020]
Atomic hydrogen (H) was introduced into steel (AISI 1018 mild steel) by controlled cathodic pre-charging. The resultant steel sample, comprising about 1 ppmw diffusible H, and a reference uncharged sample, were studied using atomic emission spectroelectrochemistry (AESEC). AESEC involved potentiodynamic polarisation in a flowing non-passivating electrolyte (0.6 M NaCl, pH 1.95) with real time reconciliation of metal dissolution using on-line inductively coupled plasma-atomic emission spectroscopy (ICP-OES). The presence of absorbed H was shown to significantly increase anodic Fe dissolution, as evidenced by the enhanced detection of Fe2+ ions by ICP-OES. We discuss this important finding in the context of previously proposed mechanisms for H-effects on the corrosion of steels.
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