Investigating the passivity and dissolution of a corrosion resistant Mg-33at.%Li alloy in aqueous chloride using online ICP-MS

Lifeng Hou, Massimo Raveggi, Xiao-Bo Chen, Wanqiang Xu, Kevin J. Laws, Yinghui Wei, Michael Ferry, Nick Birbilis

Research output: Contribution to journalArticleResearchpeer-review

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 languageEnglish
Pages (from-to)C324-C329
Number of pages6
JournalJournal of the Electrochemical Society
Volume163
Issue number6
DOIs
Publication statusPublished - 2016

Cite this

Hou, Lifeng ; Raveggi, Massimo ; Chen, Xiao-Bo ; Xu, Wanqiang ; Laws, Kevin J. ; Wei, Yinghui ; Ferry, Michael ; Birbilis, Nick. / Investigating the passivity and dissolution of a corrosion resistant Mg-33at.%Li alloy in aqueous chloride using online ICP-MS. In: Journal of the Electrochemical Society. 2016 ; Vol. 163, No. 6. pp. C324-C329.
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title = "Investigating the passivity and dissolution of a corrosion resistant Mg-33at.{\%}Li alloy in aqueous chloride using online ICP-MS",
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.",
author = "Lifeng Hou and Massimo Raveggi and Xiao-Bo Chen and Wanqiang Xu and Laws, {Kevin J.} and Yinghui Wei and Michael Ferry and Nick Birbilis",
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journal = "Journal of the Electrochemical Society",
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Investigating the passivity and dissolution of a corrosion resistant Mg-33at.%Li alloy in aqueous chloride using online ICP-MS. / Hou, Lifeng; Raveggi, Massimo; Chen, Xiao-Bo; Xu, Wanqiang; Laws, Kevin J.; Wei, Yinghui; Ferry, Michael; Birbilis, Nick.

In: Journal of the Electrochemical Society, Vol. 163, No. 6, 2016, p. C324-C329.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Investigating the passivity and dissolution of a corrosion resistant Mg-33at.%Li alloy in aqueous chloride using online ICP-MS

AU - Hou, Lifeng

AU - Raveggi, Massimo

AU - Chen, Xiao-Bo

AU - Xu, Wanqiang

AU - Laws, Kevin J.

AU - Wei, Yinghui

AU - Ferry, Michael

AU - Birbilis, Nick

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