Directionally solidified dilute Zn-Mg alloys: Correlation between microstructure and corrosion properties

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dc.citation.volume723
dc.contributor.authorVida, Talita Almeida
dc.contributor.authorConde, Ana
dc.contributor.authorFreitas, Emmanuelle Sá
dc.contributor.authorArenas, Maria Angeles
dc.contributor.authorCheung, Noe
dc.contributor.authorBrito, Crystopher Cardoso de [UNIFESP]
dc.contributor.authorDamborenea, Juan José de
dc.contributor.authorGarcia, Amauri
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.coverageLausanne
dc.date.accessioned2020-09-01T13:21:18Z
dc.date.available2020-09-01T13:21:18Z
dc.date.issued2017
dc.description.abstractZinceMagnesium (Zn-Mg) alloys have been addressed as potential biodegradable biomaterials. These alloys enable to overcome the main drawbacks of Mg, its high corrosion rate and hydrogen evolution. Moreover, homogeneous corrosion degradation is also an interesting issue to ensure the success of load-bearing biodegradable implants. In this work, two directionally solidified dilute alloys, Zn-0.3wt-% Mg and Zn-0.5wt-%Mg were studied. Both alloys having different microstructural morphologies (cellular and dendritic arrays) depending of the distance to the cooling bottom were evaluated to correlate their microstructural features with corrosion properties. Kinetics and corrosion mechanism have been evaluated by means of DC and AC electrochemical techniques in low chloride containing solution, 0.06 M NaCl. Coarser microstructures are shown to promote higher corrosion rate. Like Zn the corrosion mechanism occurs throughout a multistep dissolution process involving the formation of intermediate monovalent Zn-I, and soluble zinc hydroxychloride compounds resulting of the reaction of zincate ions with chloride ions. (C) 2017 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Campinas, UNICAMP, Dept Mfg & Mat Engn, BR-13083860 Campinas, SP, Brazil
dc.description.affiliationCSIC, CENIM, Natl Ctr Met Res, Avda Gregorio del Amo 8, Madrid 28040, Spain
dc.description.affiliationUniv Fed Sao Paulo, UNIFESP, Marine Inst, BR-11030400 Santos, SP, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo, UNIFESP, Marine Inst, BR-11030400 Santos, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)pt
dc.description.sponsorshipCSIC-Spanish National Research Council
dc.description.sponsorshipIDFAPESP: 2012/163282pt
dc.description.sponsorshipIDFAPESP: 2013/15478-3pt
dc.description.sponsorshipIDFAPESP: 2013/23396-7pt
dc.description.sponsorshipIDFAPESP: 2014/50502-5pt
dc.description.sponsorshipIDCSIC-Spanish National Research Council: i-link0944
dc.format.extent536-547
dc.identifierhttps://dx.doi.org/10.1016/j.jallcom.2017.06.228
dc.identifier.citationJournal Of Alloys And Compounds. Lausanne, v. 723, p. 536-547, 2017.
dc.identifier.doi10.1016/j.jallcom.2017.06.228
dc.identifier.issn0925-8388
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/58181
dc.identifier.wosWOS:000407009400069
dc.language.isoeng
dc.publisherElsevier Science Sa
dc.relation.ispartofJournal Of Alloys And Compounds
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectDilute Zn-Mg alloysen
dc.subjectSolidificationen
dc.subjectMicrostructureen
dc.subjectCorrosion behavioren
dc.titleDirectionally solidified dilute Zn-Mg alloys: Correlation between microstructure and corrosion propertiesen
dc.typeinfo:eu-repo/semantics/article
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