Correlating X-ray Computed Tomography Observations with Respiro-metric Measurement of Aluminium Alloy 6063 Corrosion Under FeCl3 Droplets

S. Mahmood; M.p. Bruns; C. Gallagher; S. Virtanen; D.l. Engelberg

doi:10.1016/j.corsci.2023.111704

Correlating X-ray Computed Tomography Observations with Respiro-metric Measurement of Aluminium Alloy 6063 Corrosion Under FeCl₃Droplets

S. Mahmood, M.p. Bruns, C. Gallagher, S. Virtanen, D.l. Engelberg

Materials Engineering

Research output: Contribution to journal › Article › peer-review

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 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 oxygen reduction reaction (ORR) barely takes over as 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.

Original language	English
Article number	111704
Journal	Corrosion Science
Volume	227
Early online date	24 Nov 2023
DOIs	https://doi.org/10.1016/j.corsci.2023.111704
Publication status	Published - 1 Feb 2024

Keywords

X-Ray CT
Computed Tomography
Aluminium Corrosion
6063
Atmospheric corrosion
deoxygenated
Respirometry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.corsci.2023.111704Licence: CC BY

Tomographic Imaging CCPi
Withers, P. (PI), Lee, P. (CoI) & Lionheart, W. (CoI)
29/08/15 → 28/08/20
Project: Research
Next Generation Multi-Dimensional X-ray Imaging
Withers, P. (PI), Burke, G. (CoI), Cernik, R. (CoI), Haigh, S. (CoI), Lee, P. (CoI) & Lionheart, W. (CoI)
1/02/15 → 31/01/20
Project: Research
Structural Evolution across multiple time and length scales
Withers, P. (PI), Cartmell, S. (CoI), Cernik, R. (CoI), Derby, B. (CoI), Eichhorn, S. (CoI), Freemont, A. (CoI), Hollis, C. (CoI), Mummery, P. (CoI), Sherratt, M. (CoI), Thompson, G. (CoI) & Watts, D. (CoI)
1/06/11 → 31/05/16
Project: Research

Cite this

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title = "Correlating X-ray Computed Tomography Observations with Respiro-metric Measurement of Aluminium Alloy 6063 Corrosion Under FeCl3 Droplets",

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 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 oxygen reduction reaction (ORR) barely takes over as 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.",

keywords = "X-Ray CT, Computed Tomography, Aluminium Corrosion, 6063, Atmospheric corrosion, deoxygenated, Respirometry",

author = "S. Mahmood and M.p. Bruns and C. Gallagher and S. Virtanen and D.l. Engelberg",

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doi = "10.1016/j.corsci.2023.111704",

language = "English",

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T1 - Correlating X-ray Computed Tomography Observations with Respiro-metric Measurement of Aluminium Alloy 6063 Corrosion Under FeCl3 Droplets

AU - Mahmood, S.

AU - Bruns, M.p.

AU - Gallagher, C.

AU - Virtanen, S.

AU - Engelberg, D.l.

PY - 2024/2/1

Y1 - 2024/2/1

N2 - 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 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 oxygen reduction reaction (ORR) barely takes over as 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.

AB - 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 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 oxygen reduction reaction (ORR) barely takes over as 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.

KW - X-Ray CT

KW - Computed Tomography

KW - Aluminium Corrosion

KW - 6063

KW - Atmospheric corrosion

KW - deoxygenated

KW - Respirometry

U2 - 10.1016/j.corsci.2023.111704

DO - 10.1016/j.corsci.2023.111704

M3 - Article

SN - 0010-938X

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JO - Corrosion Science

JF - Corrosion Science

M1 - 111704

ER -

Correlating X-ray Computed Tomography Observations with Respiro-metric Measurement of Aluminium Alloy 6063 Corrosion Under FeCl3 Droplets

Abstract

Keywords

UN SDGs

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Projects

Tomographic Imaging CCPi

Next Generation Multi-Dimensional X-ray Imaging

Structural Evolution across multiple time and length scales

Cite this

Correlating X-ray Computed Tomography Observations with Respiro-metric Measurement of Aluminium Alloy 6063 Corrosion Under FeCl₃Droplets