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Electrochemical characterization of cobalt-based alloys using the mini-cell system

2007Journal article Restricted access
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dc.contributor.authorNascimento, M. Lúcia
dc.contributor.authorMueller, Wolf-Dieter
dc.contributor.authorCarvalho, Ana C.
dc.contributor.authorTomás, Helena
dc.date.accessioned2019-07-09T08:58:10Z
dc.date.available2019-07-09T08:58:10Z
dc.date.issued2007
dc.description.abstractThe aim of this work was to investigate the electrochemical behavior of cobaltbased alloys of different compositions using the mini-cell system (MCS) and to test the sensitivity of this technique in the detection of variations in the electrochemical behavior caused by the different compositions of cobalt-based alloys. Methods. The electrochemical measurements were performed on two cobalt-based alloys, having a small content of gold (B¨arlight and Gold Core); one cobalt–platinum–ruthenium alloy (Porta Smart) and one classical Co-based alloy (Wironit), in two different electrolytes, 1% NaCl and phosphate buffered solution (PBS). Results. Based on I versus E curves, enhanced pitting corrosion capability was observed for the cobalt-based alloys, especially for those with lower chromium content and with the addition of a small amount of gold. The alloying of Co with Pt and Ru (Porta Smart), and the standard Co-based alloy do not show any critical instability; in contrast, a small addition of Au enhanced the pitting corrosion activity and reduced the corrosion stability. For higher alloy stability, a minimum 30% atomic ratio of chromium in the alloy composition is necessary. Furthermore, it was shown that MCS has sensitivity for the qualitative comparison of the alloys as well as in the electrochemical characterization of each alloy. Significance. Electrochemical measurements are essential to assess the quality of an alloy. MCSmighthelpinunderstandingtheroletheelementsplayintheelectrochemicalbehavior of the alloys and at the same time contribute to the selection of the alloys in terms of their quality,evenbeforemorecomplextestsinvitroorinvivoareapplied,andmightreducethe costs for materials research.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationNascimento, M. L., Mueller, W. D., Carvalho, A. C., & Tomás, H. (2007). Electrochemical characterization of cobalt-based alloys using the mini-cell system. Dental Materials, 23(3), 369-373.pt_PT
dc.identifier.doi10.1016/j.dental.2006.01.026pt_PT
dc.identifier.issn0109-5641
dc.identifier.urihttp://hdl.handle.net/10400.13/2463
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.subjectCobalt-based alloyspt_PT
dc.subjectDental materialspt_PT
dc.subjectCorrosionpt_PT
dc.subjectElectrochemical techniquespt_PT
dc.subjectCyclic voltammetrypt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleElectrochemical characterization of cobalt-based alloys using the mini-cell systempt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage373pt_PT
oaire.citation.startPage369pt_PT
oaire.citation.titleDental Materialspt_PT
oaire.citation.volume23(3)pt_PT
person.familyNameTomás
person.givenNameHelena
person.identifier556975
person.identifier.ciencia-id4D14-D31E-A8BE
person.identifier.orcid0000-0002-7856-2041
person.identifier.ridE-5991-2010
person.identifier.scopus-author-id6508104177
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication3a747114-6ab9-454b-985b-00cbf792e273
relation.isAuthorOfPublication.latestForDiscovery3a747114-6ab9-454b-985b-00cbf792e273

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