Localized electrochemical impedance for characterizing welded areas of dissimilar Al alloys 2024-T3 and 7475-T761 joined by FSW

dc.contributor.authorABREU, C.P. de
dc.contributor.authorCOSTA, I.
dc.contributor.authorMELO, H.G. de
dc.contributor.authorPEBERE, N.
dc.contributor.authorVIVIER, V.
dc.coverageInternacionalpt_BR
dc.creator.eventoEUROPEAN CORROSION CONGRESS, 11thpt_BR
dc.date.accessioned2017-03-24T13:15:26Z
dc.date.available2017-03-24T13:15:26Z
dc.date.eventoSeptember 21pt_BR
dc.description.abstractFriction Stir Welding (FSW) is an efficient way to join high strength aluminum alloys avoiding de-fects that are usually found when conventional techniques are adopted. The aeronautic industry has shown great interest in this welding method, either for joining similar or dissimilar alloys. However, FSW generates different microstructural areas that could give rise to galvanic couplings on the weld-ing area. In the present study, FSW was used to join two similar and dissimilar aluminum alloys, the AA2024 and the AA7475 alloys. To evaluate the effect of the welding process on the corrosion re-sistance of the joined alloys, electrochemical impedance spectroscopy studies, either global or local-ized (LEIS), have been carried out in a low corrosive medium (0.1 M Na2SO4) or with a small addi-tion of chlorides (0.1 M Na2SO4 + 0.001 M NaCl). A gel visualization technique was also employed to detect possible galvanic couplings of the different zones formed during the FSW welding. OCP measurements were also performed on both individual aluminum alloys and on the zones affected by FSW. LEIS investigations were performed at different locations above the different microstructural zones induced by the FSW process on both alloys. Galvanic coupling was clearly evidenced at the interface between the two alloys, contrary to the results reported in literature for the welding of simi-lar alloys, for which no galvanic coupling was evidenced.pt_BR
dc.event.siglaEUROCORRpt_BR
dc.format.extent1pt_BR
dc.identifier.citationABREU, C.P. de; COSTA, I.; MELO, H.G. de; PEBERE, N.; VIVIER, V. Localized electrochemical impedance for characterizing welded areas of dissimilar Al alloys 2024-T3 and 7475-T761 joined by FSW. In: EUROPEAN CORROSION CONGRESS, 11th, September 21, Montpellier, France. <b>Proceedings...</b> p. 1. Disponível em: http://repositorio.ipen.br/handle/123456789/27315.
dc.identifier.orcidhttps://orcid.org/0000-0002-4987-3334
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/27315
dc.local.eventoMontpellier, Francept_BR
dc.rightsopenAccesspt_BR
dc.subjectelectric impedance
dc.subjectelectrochemistry
dc.subjectaluminium alloys
dc.subjectfriction welding
dc.subjectcoupling
dc.subjectelectrochemical corrosion
dc.titleLocalized electrochemical impedance for characterizing welded areas of dissimilar Al alloys 2024-T3 and 7475-T761 joined by FSWpt_BR
dc.typeTexto completo de eventopt_BR
dspace.entity.typePublication
ipen.autorISOLDA COSTA
ipen.autorCAIO PALUMBO DE ABREU
ipen.codigoautor429
ipen.codigoautor10225
ipen.contributor.ipenauthorISOLDA COSTA
ipen.contributor.ipenauthorCAIO PALUMBO DE ABREU
ipen.date.recebimento17-03pt_BR
ipen.event.datapadronizada2016pt_BR
ipen.identifier.ipendoc23659pt_BR
ipen.notas.internasProceedingspt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublication952cc9fe-41a5-443f-b21a-316edc344ec8
relation.isAuthorOfPublication820b2482-4eea-4ef2-bd7c-4538b1a51c90
relation.isAuthorOfPublication.latestForDiscovery820b2482-4eea-4ef2-bd7c-4538b1a51c90
sigepi.autor.atividadeABREU, C.P. de.:10225:730:Spt_BR
sigepi.autor.atividadeCOSTA, I.:429:730:Npt_BR
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