Abstract
The corrosion and dissolution of a newmagnesium-lithium (Mg-Li) alloy was studied using an electrochemical flow cell coupled with inductively coupled plasma - mass spectroscopy (ICP-MS) allowing real-time spectroelectrochemical analysis. The alloy studied is a corrosion resistant Mg-33at. % Li alloy, which possesses a body centered cubic matrix and a homogenous nanostructure. A detailed investigation of the dissolution kinetics of this alloy is important for understanding the origins of its apparently high corrosion resistance. Whilst the alloy composition ratio of Mg:Li is ∼2, it was revealed that the dissolution ratio of metallic Mg:Li in 0.01 M NaCl was ∼3.4 via downstream detection of ions. The deficiency of Li detected in the downstream electrolyte via ICP-MS was attributed to the development of a persistent Li-rich surface film that forms dynamically in the open circuit condition and for applied potentials below ∼-1050 mVAg/AgCl. For potentials positive to ∼-1050 mVAg/AgCl, significant Li ion detection in solution was observed, commensurate with the alloy compositional ratio.
Original language | English |
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Pages (from-to) | C324-C329 |
Number of pages | 6 |
Journal | Journal of the Electrochemical Society |
Volume | 163 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2016 |
Equipment
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Centre for Electron Microscopy (MCEM)
Flame Sorrell (Manager) & Peter Miller (Manager)
Office of the Vice-Provost (Research and Research Infrastructure)Facility/equipment: Facility