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dc.contributor.authorFeliú Jr., S.-
dc.contributor.authorMaffiotte, C.-
dc.contributor.authorSamaniego, Alejandro-
dc.contributor.authorGalván Sierra, Juan Carlos-
dc.contributor.authorBarranco, Violeta-
dc.date.accessioned2014-05-06T09:21:19Z-
dc.date.available2014-05-06T09:21:19Z-
dc.date.issued2011-
dc.identifier.citationApplied Surface Science 267(20): 8558-8568 (2011)es_ES
dc.identifier.issn0169-4332-
dc.identifier.urihttp://hdl.handle.net/10261/96220-
dc.description.abstractThe purpose of this study has been to advance in knowledge of the chemical composition, structure and thickness of the thin native oxide film formed spontaneously in contact with the laboratory atmosphere on the surface of freshly polished commercial AZ31 and AZ61 alloys with a view to furthering the understanding of protection mechanisms. For comparative purposes, and to more fully describe the behaviour of the native oxide film, the external oxide films formed as a result of the manufacturing process (as-received condition) have been characterised. The technique applied in this research to study the thin oxide films (thickness of just a few nanometres) present on the surface of the alloys has basically been XPS (X-ray photoelectron spectroscopy) in combination with ion sputtering. Corrosion properties of the alloys were studied in 0.6 M NaCl by measuring charge transfer resistance values, which are deduced from EIS (electrochemical impedance spectroscopy) measurements after 1 h of exposure. Alloy AZ61 generally showed better corrosion resistance than AZ31, and the freshly polished alloys showed better corrosion resistance than the alloys in as-received condition. This is attributed to a combination of (1) higher thickness of the native oxide film on the AZ61 alloy and (2) greater uniformity of the oxide film in the polished condition. The formation of an additional oxide layer composed by a mixture of spinel (MgAl2O4) and MgO seems to diminish the protective properties of the passive layer on the surface of the alloys in as-received conditiones_ES
dc.description.sponsorshipfinancial support for this work from the Ministry of Science and Innovation of Spain (MAT 2009-13530es_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.rightsopenAccesses_ES
dc.subjectMagnesium alloyses_ES
dc.subjectNative oxide filmes_ES
dc.subjectChemistry and structurees_ES
dc.subjectCorrosion propertieses_ES
dc.subjectXPSes_ES
dc.titleEffect of the chemistry and structure of the native oxide surface film on the corrosion properties of commercial AZ31 and AZ61 alloyses_ES
dc.typeArtículoes_ES
dc.identifier.doi10.1016/j.apsusc.2011.05.014-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.apsusc.2011.05.014es_ES
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