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The effect of absorbed hydrogen on the dissolution of steel

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Date

2016-12-01

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Abstract

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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Keywords

Engineering, Materials Science

Citation

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https://dspace-test.anu.edu.au/handle/1885/733716330

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DevOps Pure Testing

Source

Heliyon

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Article

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DOI

10.1016/j.heliyon.2016.e00209

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