Correlating X-ray computed tomography observations with respirometric measurement of aluminium alloy 6063 corrosion under FeCl3 droplets

Mahmood S, Bruns M, Gallagher C, Virtanen S, Engelberg DL (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Corrosion Science Elsevier

Book Volume: 227

Article Number: 111704

DOI: 10.1016/j.corsci.2023.111704

Abstract

Corrosion of aluminium alloy 6063-T6 with exposure to simulated steel corrosion products using ferric chloride droplets was investigated. Focus of these experiments was to understand the role of oxygen in the redox process; therefore, samples were exposed to standard atmospheric conditions as well as to oxygen-derived conditions. Respirometric measurements indicate that the hydrogen evolution reaction (HER) is the dominant cathodic reaction. Especially in the initial stages when the corrosion rates are the highest, the HER occurs almost exclusively. At the later stages the oxygen reduction reaction (ORR) barely takes over as the main cathodic reaction. The dissolved volumes and maximum corrosion depths determined with X-ray Computed Tomography (XCT) were more significant for those samples deprived of oxygen. The composition of iron-rich deposits formed consisted of magnetite and maghemite, supporting exposure conditions where reactions were deprived of oxygen.

Authors with CRIS profile

Mark Bruns Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Sannakaisa Virtanen Professur für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)

Involved external institutions

University of Manchester GB United Kingdom (GB) Sellafield GB United Kingdom (GB)

How to cite

APA:

Mahmood, S., Bruns, M., Gallagher, C., Virtanen, S., & Engelberg, D.L. (2024). Correlating X-ray computed tomography observations with respirometric measurement of aluminium alloy 6063 corrosion under FeCl3 droplets. Corrosion Science, 227. https://doi.org/10.1016/j.corsci.2023.111704

MLA:

Mahmood, S., et al. "Correlating X-ray computed tomography observations with respirometric measurement of aluminium alloy 6063 corrosion under FeCl3 droplets." Corrosion Science 227 (2024).

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