In situ spatiotemporal solute imaging of metal corrosion on the example of magnesium

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In situ spatiotemporal solute imaging of metal corrosion on the example of magnesium. / Wagner, Stefan; Hummel, Christina; Santner, Jakob; Puschenreiter, Markus; Irrgeher, Johanna; Wenzel, Walter W.; Borisov, Sergey M.; Prohaska, Thomas.

in: Analytica chimica acta, Jahrgang 1212.2022, Nr. 15 June, 339910, 06.05.2022.

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

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Wagner, Stefan ; Hummel, Christina ; Santner, Jakob ; Puschenreiter, Markus ; Irrgeher, Johanna ; Wenzel, Walter W. ; Borisov, Sergey M. ; Prohaska, Thomas. / In situ spatiotemporal solute imaging of metal corrosion on the example of magnesium. in: Analytica chimica acta. 2022 ; Jahrgang 1212.2022, Nr. 15 June.

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@article{bc34b3cd57344783a8438bf5d7dec1c4,
title = "In situ spatiotemporal solute imaging of metal corrosion on the example of magnesium",
abstract = "Visualization and quantification of corrosion processes is essential in materials research. Here we present a new approach for 2D spatiotemporal imaging of metal corrosion dynamics in situ. The approach combines time-integrated Mg 2+ flux imaging by diffusive gradients in thin films laser ablation inductively coupled plasma mass spectrometry (DGT LA-ICP-MS) and near real-time pH imaging by planar optodes. The parallel assessment of Mg 2+ flux and pH distributions on a fine-structured, bare Mg alloy (b-WE43) showed intense Mg dissolution with Mg 2+ flux maxima up to 11.9 ng cm −2 s −1 and pH increase >9 during initial corrosion (≤15 min) in aqueous NaNO 3 solution (c = 0.01 mol L −1). The techniques visualized the lower initial corrosion rate in buffered synthetic body fluid (Hank's balanced salt solution; pH 7.6) compared to unbuffered NaNO 3 (pH 6.0), but precise localization of Mg corrosion remains challenging under these conditions. To further demonstrate the capability of DGT LA-ICP-MS for spatiotemporal metal flux imaging at the microscale, a coated Mg alloy (c-WE43) with lower reactivity was deployed for ≤120 min. The high spatial resolution (∼10 μm × 80 μm) and low limits of detection (≤0.04 ng cm −2 s −1, t = 60 min) enabled accurate in situ localization and quantification (U rel = 20%, k = 2) of distinct Mg 2+ flux increase, showing micro-confined release of Mg 2+ from surface coating defects on c-WE43 samples. The presented approach can be extended to other metal species and applied to other materials to better understand corrosion processes and improve material design in technological engineering. ",
author = "Stefan Wagner and Christina Hummel and Jakob Santner and Markus Puschenreiter and Johanna Irrgeher and Wenzel, {Walter W.} and Borisov, {Sergey M.} and Thomas Prohaska",
note = "Publisher Copyright: {\textcopyright} 2022 The Authors",
year = "2022",
month = may,
day = "6",
doi = "10.1016/j.aca.2022.339910",
language = "English",
volume = "1212.2022",
journal = "Analytica chimica acta",
issn = "0003-2670",
publisher = "Elsevier",
number = "15 June",

}

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TY - JOUR

T1 - In situ spatiotemporal solute imaging of metal corrosion on the example of magnesium

AU - Wagner, Stefan

AU - Hummel, Christina

AU - Santner, Jakob

AU - Puschenreiter, Markus

AU - Irrgeher, Johanna

AU - Wenzel, Walter W.

AU - Borisov, Sergey M.

AU - Prohaska, Thomas

N1 - Publisher Copyright: © 2022 The Authors

PY - 2022/5/6

Y1 - 2022/5/6

N2 - Visualization and quantification of corrosion processes is essential in materials research. Here we present a new approach for 2D spatiotemporal imaging of metal corrosion dynamics in situ. The approach combines time-integrated Mg 2+ flux imaging by diffusive gradients in thin films laser ablation inductively coupled plasma mass spectrometry (DGT LA-ICP-MS) and near real-time pH imaging by planar optodes. The parallel assessment of Mg 2+ flux and pH distributions on a fine-structured, bare Mg alloy (b-WE43) showed intense Mg dissolution with Mg 2+ flux maxima up to 11.9 ng cm −2 s −1 and pH increase >9 during initial corrosion (≤15 min) in aqueous NaNO 3 solution (c = 0.01 mol L −1). The techniques visualized the lower initial corrosion rate in buffered synthetic body fluid (Hank's balanced salt solution; pH 7.6) compared to unbuffered NaNO 3 (pH 6.0), but precise localization of Mg corrosion remains challenging under these conditions. To further demonstrate the capability of DGT LA-ICP-MS for spatiotemporal metal flux imaging at the microscale, a coated Mg alloy (c-WE43) with lower reactivity was deployed for ≤120 min. The high spatial resolution (∼10 μm × 80 μm) and low limits of detection (≤0.04 ng cm −2 s −1, t = 60 min) enabled accurate in situ localization and quantification (U rel = 20%, k = 2) of distinct Mg 2+ flux increase, showing micro-confined release of Mg 2+ from surface coating defects on c-WE43 samples. The presented approach can be extended to other metal species and applied to other materials to better understand corrosion processes and improve material design in technological engineering.

AB - Visualization and quantification of corrosion processes is essential in materials research. Here we present a new approach for 2D spatiotemporal imaging of metal corrosion dynamics in situ. The approach combines time-integrated Mg 2+ flux imaging by diffusive gradients in thin films laser ablation inductively coupled plasma mass spectrometry (DGT LA-ICP-MS) and near real-time pH imaging by planar optodes. The parallel assessment of Mg 2+ flux and pH distributions on a fine-structured, bare Mg alloy (b-WE43) showed intense Mg dissolution with Mg 2+ flux maxima up to 11.9 ng cm −2 s −1 and pH increase >9 during initial corrosion (≤15 min) in aqueous NaNO 3 solution (c = 0.01 mol L −1). The techniques visualized the lower initial corrosion rate in buffered synthetic body fluid (Hank's balanced salt solution; pH 7.6) compared to unbuffered NaNO 3 (pH 6.0), but precise localization of Mg corrosion remains challenging under these conditions. To further demonstrate the capability of DGT LA-ICP-MS for spatiotemporal metal flux imaging at the microscale, a coated Mg alloy (c-WE43) with lower reactivity was deployed for ≤120 min. The high spatial resolution (∼10 μm × 80 μm) and low limits of detection (≤0.04 ng cm −2 s −1, t = 60 min) enabled accurate in situ localization and quantification (U rel = 20%, k = 2) of distinct Mg 2+ flux increase, showing micro-confined release of Mg 2+ from surface coating defects on c-WE43 samples. The presented approach can be extended to other metal species and applied to other materials to better understand corrosion processes and improve material design in technological engineering.

UR - http://www.scopus.com/inward/record.url?scp=85130080520&partnerID=8YFLogxK

U2 - 10.1016/j.aca.2022.339910

DO - 10.1016/j.aca.2022.339910

M3 - Article

VL - 1212.2022

JO - Analytica chimica acta

JF - Analytica chimica acta

SN - 0003-2670

IS - 15 June

M1 - 339910

ER -