Magnetic field effects on the corrosion behavior of magnetocaloric alloys LaFe13.9Si1.4Hy under ferromagnetic states
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Author(s)
Type
Journal Article
Abstract
La(Fe,Si)13-based alloys, with giant magnetocaloric effect, still encounter significant degradation issues prior to commercial viability. In this work, the corrosion behavior of ferromagnetic La(Fe,Si)13Hy was investigated with electrochemical linear polarization resistance measurements under conditions with zero, 1 T parallel, and perpendicular magnetic fields, mimicking practical application scenarios. The results demonstrated that both parallel and perpendicular magnetic fields had a suppressive effect on corrosion rates due to the combined influence of magnetohydrodynamic forces and magnetic field gradient forces. The inhibiting efficiency of the parallel field decreased with increasing exposure period, while that of the perpendicular field continued to increase over time. The magnetic field also affected the relative proportion of rust phases, and thereby the protectiveness of the rust layer. This highlights the importance of conducting experiments under service conditions to understand the degradation mechanisms of magnetic cooling devices.
Date Issued
2025-02-25
Date Acceptance
2025-02-03
Citation
Journal of Alloys and Compounds, 2025, 1017
ISSN
0925-8388
Publisher
Elsevier
Start Page
179002
End Page
179002
Journal / Book Title
Journal of Alloys and Compounds
Volume
1017
Copyright Statement
Copyright © 2025 Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies. This is the author’s accepted manuscript made available under a CC-BY licence in accordance with Imperial’s Research Publications Open Access policy (www.imperial.ac.uk/oa-policy)
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Publication Status
Published
Article Number
179002
Date Publish Online
2025-02-04