On the development and application of an in-house fabricated Mg2+ ion selective microelectrode (ISME) for assessing mg corrosion

S. H. Salleh, N. Birbilis, M. Musameh, K. Venkatesan, S. Thomas

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A solid-contact Mg2+ ion-selective microelectrode (ISME) usually consists of a carbon fiber coated with conducting polymer, such as electropolymerized 3, 4 ethylenedioxythiopene (PEDOT), in contact with the ion-selective membrane. PEDOT is typically electrochemically deposited onto the carbon fibers from rather expensive ionic liquid based dopants. Herein, Mg2+ ISMEs were assembled using a commercially available Mg2+ ionophore-containing solution and PEDOT electrochemically deposited from sodium p-toluenesulfonate, thus providing a simple and inexpensive method to develop Mg2+ ISMEs. The ISME fabricated by this procedure is successfully able to respond to Mg2+ ion concentrations arising from pure Mg during free corrosion and also galvanic corrosion (when Mg is coupled to pure iron).

Original languageEnglish
Pages (from-to)C771-C776
Number of pages6
JournalJournal of the Electrochemical Society
Issue number11
Publication statusPublished - 1 Jan 2018

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