| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 218650 | Journal of Electroanalytical Chemistry | 2015 | 8 Pages |
•Fabrication and analytical validation of a micro Mg2+ potentiometric sensor.•In-situ electrochemical detection of Mg2+ ions generated from a corroding Mg alloy.•Pre-positioning of micro Mg2+ sensor with high resolution using shear force mode.•Correlation of Al and microstructure distribution in Mg alloys with Mg2+ release.•Precise determination of Mg(OH)2 precipitation time.
Quantitative in-situ and localized analytical methods that can monitor Mg2+ release are central to probe the impact of the microstructure on magnesium alloy corrosion. As such, a potentiometric micro-Mg2+ ion-selective membrane electrode is fabricated, calibrated, characterized and used to selectively monitor the Mg2+ release from different cast Mg AM50 alloys during corrosion. We demonstrate that the local Mg2+ release is tied to the alloy microstructure and its aluminum distribution, indicating a possibility of optimization of the base material corrosion properties.
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