Effect of heat treatment of magnesium alloy substrates on corrosion resistance of a hybrid organic-inorganic sol-gel film

The influence of heat treatment of magnesium alloy substrates on corrosion resistance of a sol¿gel coating has been assessed during immersion tests in 0.6 M NaCl aqueous solution. Relative differences in the chemical nature of the layers were quantified by scanning electron microscopy (SEM) and ener...

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Detalles Bibliográficos
Autores: Diaz, L., García Galván, Federico, Llorente, Irene, Jiménez-Morales, Antonia, Galván Sierra, Juan Carlos, Feliú Jr., S.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/128192
Acceso en línea:http://hdl.handle.net/10261/128192
Access Level:acceso abierto
Palabra clave:AZ32
Sol Gel film
Corrosion
Magnesium alloy
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spelling Effect of heat treatment of magnesium alloy substrates on corrosion resistance of a hybrid organic-inorganic sol-gel filmDiaz, L.García Galván, FedericoLlorente, IreneJiménez-Morales, AntoniaGalván Sierra, Juan CarlosFeliú Jr., S.AZ32Sol Gel filmCorrosionMagnesium alloyThe influence of heat treatment of magnesium alloy substrates on corrosion resistance of a sol¿gel coating has been assessed during immersion tests in 0.6 M NaCl aqueous solution. Relative differences in the chemical nature of the layers were quantified by scanning electron microscopy (SEM) and energy dispersive analysis of X-ray (EDX). Corrosion behaviour was evaluated by Electrochemical Impedance Spectroscopy (EIS) and hydrogen evolution measurement. Long-term immersion testing show that the sol¿gel/heat treated AZ61 substrate exhibits a superior anti-corrosion property in comparison with the sol¿gel/non-heated substrate. In contrast, no significant changes have been observed between the heated and non-heated samples in the case of the sol¿gel coated AZ31 substrates. A link was found between lower O/Si atomic ratios observed by EDX analysis on the sol¿gel coatings after the preparation process and reduced corrosion upon the coated substrates. Heat-treatment increased the protective properties of the passive film on the surface of the AZ61 substrate and hence inhibited magnesium dissolution and hydrophilic group formation during coating preparation.Peer ReviewedRoyal Society of Chemistry (UK)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]20152016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/128192reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1039/c5ra16785jSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1281922026-05-22T06:33:51Z
dc.title.none.fl_str_mv Effect of heat treatment of magnesium alloy substrates on corrosion resistance of a hybrid organic-inorganic sol-gel film
title Effect of heat treatment of magnesium alloy substrates on corrosion resistance of a hybrid organic-inorganic sol-gel film
spellingShingle Effect of heat treatment of magnesium alloy substrates on corrosion resistance of a hybrid organic-inorganic sol-gel film
Diaz, L.
AZ32
Sol Gel film
Corrosion
Magnesium alloy
title_short Effect of heat treatment of magnesium alloy substrates on corrosion resistance of a hybrid organic-inorganic sol-gel film
title_full Effect of heat treatment of magnesium alloy substrates on corrosion resistance of a hybrid organic-inorganic sol-gel film
title_fullStr Effect of heat treatment of magnesium alloy substrates on corrosion resistance of a hybrid organic-inorganic sol-gel film
title_full_unstemmed Effect of heat treatment of magnesium alloy substrates on corrosion resistance of a hybrid organic-inorganic sol-gel film
title_sort Effect of heat treatment of magnesium alloy substrates on corrosion resistance of a hybrid organic-inorganic sol-gel film
dc.creator.none.fl_str_mv Diaz, L.
García Galván, Federico
Llorente, Irene
Jiménez-Morales, Antonia
Galván Sierra, Juan Carlos
Feliú Jr., S.
author Diaz, L.
author_facet Diaz, L.
García Galván, Federico
Llorente, Irene
Jiménez-Morales, Antonia
Galván Sierra, Juan Carlos
Feliú Jr., S.
author_role author
author2 García Galván, Federico
Llorente, Irene
Jiménez-Morales, Antonia
Galván Sierra, Juan Carlos
Feliú Jr., S.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv AZ32
Sol Gel film
Corrosion
Magnesium alloy
topic AZ32
Sol Gel film
Corrosion
Magnesium alloy
description The influence of heat treatment of magnesium alloy substrates on corrosion resistance of a sol¿gel coating has been assessed during immersion tests in 0.6 M NaCl aqueous solution. Relative differences in the chemical nature of the layers were quantified by scanning electron microscopy (SEM) and energy dispersive analysis of X-ray (EDX). Corrosion behaviour was evaluated by Electrochemical Impedance Spectroscopy (EIS) and hydrogen evolution measurement. Long-term immersion testing show that the sol¿gel/heat treated AZ61 substrate exhibits a superior anti-corrosion property in comparison with the sol¿gel/non-heated substrate. In contrast, no significant changes have been observed between the heated and non-heated samples in the case of the sol¿gel coated AZ31 substrates. A link was found between lower O/Si atomic ratios observed by EDX analysis on the sol¿gel coatings after the preparation process and reduced corrosion upon the coated substrates. Heat-treatment increased the protective properties of the passive film on the surface of the AZ61 substrate and hence inhibited magnesium dissolution and hydrophilic group formation during coating preparation.
publishDate 2015
dc.date.none.fl_str_mv 2015
2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/128192
url http://hdl.handle.net/10261/128192
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1039/c5ra16785j
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Royal Society of Chemistry (UK)
publisher.none.fl_str_mv Royal Society of Chemistry (UK)
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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