Evolution of hydrogen at dissolving magnesium surfaces

By Gerald S. Frankel, Alejandro Samaniego, Nick Birbilis. 2013

367 citations recorded by the source corpus.

The origin of hydrogen evolved at dissolving magnesium surfaces, including those subjected to anodic polarisation, remains a topical issue. In this work, a critical appraisal of existing theories is presented, along with data from simultaneous polarisation and hydrogen collection tests. The observations invalidate mechanisms invoking the presence of univalent Mg+. A combined experimental and thermodynamic analysis suggests that the ability of magnesium to support the cathodic reaction is enhanced during dissolution as the result of an increase in the exchange current density for the hydrogen evolution reaction, This mechanism can also explain high rates of hydrogen evolution in aluminium pits.

Subfields: Biomaterials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/b038ee70c31c4df985d1c51fef4f4009da12c5e7

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In Biomaterials

In Materials Chemistry

Citations in the corpus

Clarifying the decisive factors for utilization efficiency of Mg anodes for primary aqueous batteries (2019, background): “[45] to collect the gas during galvanostatic polarization of Mg.”
Fundamentals and advances in magnesium alloy corrosion (2017, background): “20 shows how an Evans diagram of the Mg dissolution and HER half reactions could be affected if i0,H,Mg increases due to anodic polarization [62].”