Show simple item record

dc.contributor.authorSouto, Ricardo Manuel 
dc.contributor.authorIzquierdo Pérez, Javier 
dc.contributor.authorMareci, Daniel
dc.contributor.authorBolat, Georgiana
dc.contributor.authorSantana, Juan José
dc.contributor.authorRodríguez Raposo, Raquel 
dc.contributor.authorFernández-Mérida, Luis 
dc.contributor.authorBurtan, Liviu
dc.contributor.authorTrincă, Lucia Carmen
dc.date.accessioned2020-03-19T17:25:14Z
dc.date.available2020-03-19T17:25:14Z
dc.date.issued2020es_ES
dc.identifier.urihttp://riull.ull.es/xmlui/handle/915/18952
dc.description.abstractBinary Zr-Ti alloys spontaneously develop a tenacious and compact oxide layer when their fresh surface is exposed either to air or to aqueous environments. Electrochemical impedance spectroscopy (EIS) analysis of Zr-45Ti, Zr-25Ti, and Zr-5Ti exposed to simulated physiological solutions at 37 C evidences the formation of a non-sealing bilayer oxide film that accounts for the corrosion resistance of the materials. Unfortunately, these oxide layers may undergo breakdown and stable pitting corrosion regimes at anodic potentials within the range of those experienced in the human body under stress and surgical conditions. Improved corrosion resistance has been achieved by prior treatment of these alloys using thermal oxidation in air. EIS was employed to measure the corrosion resistance of the Zr-Ti alloys in simulated physiological solutions of a wide pH range (namely 3 pH 8) at 37 C, and the best results were obtained for the alloys pre-treated at 500 C. The formation of the passivating oxide layers in simulated physiological solution was monitored in situ using scanning electrochemical microscopy (SECM), finding a transition from an electrochemically active surface, characteristic of the bare metal, to the heterogeneous formation of oxide layers behaving as insulating surfaces towards electron transfer reactions.en
dc.format.mimetypeapplication/pdf
dc.language.isoenes_ES
dc.relation.ispartofseriesMetals, 10, 166 (2020), 15 pp.es_ES
dc.rightsLicencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 Internacional)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es_ES
dc.titleImprovement of the corrosion resistance of biomedical Zr-Ti alloys using a thermal oxidation treatmenten
dc.typeinfo:eu-repo/semantics/article
dc.identifier.doi10.3390/met10020166
dc.subject.keywordZr-Ti binary alloysen
dc.subject.keywordbiomaterialen
dc.subject.keywordsurface modificationen
dc.subject.keywordcorrosion resistanceen
dc.subject.keywordelectrochemical techniquesen


Files in this item

This item appears in the following Collection(s)

Show simple item record

Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 Internacional)
Except where otherwise noted, this item's license is described as Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 Internacional)