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Oxidation behaviour of amorphous steel: impact on electromagnetic properties

Alejandro Garza-Caballero (Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León , Nuevo Léon, Mexico)
Gina Idárraga-Ospina (Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León , Nuevo Léon, Mexico)
Nora A. García-Gomez (Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León , Nuevo Léon, Mexico)
Francisco Aurelio Pérez-González (Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León , Nuevo Léon, Mexico)
Maribel De-la-Garza-Garza (Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León , Nuevo Léon, Mexico)
Alfredo Artigas (Departamento de Ingeniería Metalúrgica, Universidad de Santiago de Chile , Santiago, Chile)
Alberto Monsalve (Departamento de Ingeniería Metalúrgica, Universidad de Santiago de Chile , Santiago, Chile)
Rafael Colás (Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León , Nuevo Léon, Mexico)
Nelson Federico Garza-Montes-de-Oca (Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León , Nuevo Léon, Mexico)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 2 May 2017

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Abstract

Purpose

High silicon amorphous steels are gaining preference as the material of choice for the fabrication of the core of low and medium power electrical transformers because they present a better electromagnetic behaviour compared to that offered by common grain-oriented and non-oriented high silicon steels. This study aims to investigate the effects that the environmental conditions present during the high temperature annealing of cores exert on the surface oxidation and electromagnetic changes experienced by a commercial amorphous steel alloy.

Design/methodology/approach

The effect of environmental impact on the correct development of annealing practices during the manufacture process of amorphous steel cores used in distribution transformers was studied by the development of an oxidation reactor. With this installation, it was possible to simulate environmental conditions that could affect the surface of magnetic cores made from amorphous steel.

Findings

It was found that: the surface oxidation of amorphous steels affects their electromagnetic behaviour, environmentally induced surface degradation can be modelled at laboratory scale and oxide formation does not affect the amorphous condition of the alloy.

Originality/value

The effect of surface oxidation induced by the existence of water vapour in the annealing process of cores made from amorphous steels and its impact on the electromagnetic behavior of these alloys has been barely studied.

Keywords

Acknowledgements

The authors would like to thank the research fund 238232 of the National Council for Science and Technology (CONACYT), the Mexican program for lecturer formation and development (PRODEP), Universidad Autónoma de Nuevo Leon (UANL) and Universidad de Santiago de Chile for the facilities provided to develop this investigation.

Citation

Garza-Caballero, A., Idárraga-Ospina, G., García-Gomez, N.A., Pérez-González, F.A., De-la-Garza-Garza, M., Artigas, A., Monsalve, A., Colás, R. and Garza-Montes-de-Oca, N.F. (2017), "Oxidation behaviour of amorphous steel: impact on electromagnetic properties", Anti-Corrosion Methods and Materials, Vol. 64 No. 3, pp. 340-346. https://doi.org/10.1108/ACMM-09-2015-1577

Publisher

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Emerald Publishing Limited

Copyright © 2017, Emerald Publishing Limited