The roles of Al2Cu and of dendritic refinement on surface corrosion resistance of hypoeutectic Al-Cu alloys immersed in H2SO4

dc.creatorOsorio, WR
dc.creatorSpinelli, JE
dc.creatorFreire, CMA
dc.creatorCardona, MB
dc.creatorGarcia, A
dc.date2007
dc.dateSEP 27
dc.date2014-11-16T06:55:19Z
dc.date2015-11-26T16:20:45Z
dc.date2014-11-16T06:55:19Z
dc.date2015-11-26T16:20:45Z
dc.date.accessioned2018-03-28T23:03:04Z
dc.date.available2018-03-28T23:03:04Z
dc.identifierJournal Of Alloys And Compounds. Elsevier Science Sa, v. 443, n. 41671, n. 87, n. 93, 2007.
dc.identifier0925-8388
dc.identifierWOS:000248736800017
dc.identifier10.1016/j.jallcom.2006.10.010
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/72417
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/72417
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/72417
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1267860
dc.descriptionAl-Cu alloys castings can exhibit different corrosion responses at different locations due to copper content and to the resulting differences on microstructural features and on Al2CU fractions. The aim of this study was to investigate the influence of Al2CU intermetallic particles associated to the dendritic arm spacings on the general corrosion resistance of three different hypoeutectic Al-Cu alloys samples in sulfuric acid solution. The cast samples were produced using a non-consumable tungsten electrode furnace with a water-cooled copper hearth under argon atmosphere. The typical microstructural pattern was examined by using electronic microscopy techniques. In order to evaluate the surface corrosion behavior of such Al-Cu alloys, corrosion tests were performed in a 0.5 M sulfuric acid solution at 25 degrees C by using an electrochemical impedance spectroscopy (EIS) technique and potentiodynamic polarization curves. An equivalent circuit was also used to provide quantitative support for the discussions and understanding of the corrosion behavior. It was found that Al2Cu has a less noble corrosion potential than that of the Al-rich phase. Despite that, dendrite fineness has proved to be more influent on corrosion resistance than the increase on alloy copper content with the consequent increase on Al2CU fraction. (c) 2006 Elsevier B.V. All rights reserved.
dc.description443
dc.description41671
dc.description87
dc.description93
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationJournal Of Alloys And Compounds
dc.relationJ. Alloy. Compd.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectAl-Cu alloys
dc.subjectAl2Cu
dc.subjectcorrosion resistance
dc.subjectmicrostructure
dc.subjectdendritic spacing
dc.subjectUnsteady-state Solidification
dc.subjectAluminum-alloys
dc.subjectIntermetallic Phases
dc.subjectMicrostructure
dc.subjectSn
dc.subjectZn
dc.subjectPolarization
dc.subjectSpecimens
dc.subjectSpacings
dc.subjectAz91d
dc.titleThe roles of Al2Cu and of dendritic refinement on surface corrosion resistance of hypoeutectic Al-Cu alloys immersed in H2SO4
dc.typeArtículos de revistas


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