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Internal oxidation and formation of Si/Al-enriched oxide bands in the scale of electrical steel grades

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Hofler, Thomas, Linder, Bernhard, Angeli, Gerhard, Gierl-Mayer, Christian, Danninger, Herbert and Auinger, Michael (2021) Internal oxidation and formation of Si/Al-enriched oxide bands in the scale of electrical steel grades. Corrosion Science, 187 . 109502. doi:10.1016/j.corsci.2021.109502

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Official URL: http://dx.doi.org/10.1016/j.corsci.2021.109502

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Abstract

Oxidation during steel hot rolling is responsible for various surface defects. Local enrichments of oxygen-affine alloying elements such as silicon or aluminium can cause such defects by complicating oxide scale removal. In this paper, correlations between the temperature profile during oxidation and enrichment formation in electrical steels are investigated. Diffusion and reaction simulations using the numerical Crank-Nicolson-scheme are evaluated by comparing them to laboratory-scale oxidized samples. Furthermore, analytical approximations (spectral methods) are investigated as an alternative approach, focusing on trade-offs between accuracy and calculation times. A link between heating periods during oxidation and Si/Al-rich bands in the scale was established.

Item Type: Journal Article
Subjects: T Technology > TN Mining engineering. Metallurgy
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Steel alloys, Oxidation, Corrosion and anti-corrosives, Materials at high temperatures
Journal or Publication Title: Corrosion Science
Publisher: Elsevier
ISSN: 0010-938X
Official Date: 15 July 2021
Dates:
DateEvent
15 July 2021Published
4 May 2021Available
26 April 2021Accepted
Volume: 187
Article Number: 109502
DOI: 10.1016/j.corsci.2021.109502
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
844607Österreichische ForschungsförderungsgesellschaftUNSPECIFIED

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