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Effect of added porosity on a novel porous Ti-Nb-Ta-Fe-Mn alloy exposed to simulated body fluid

dc.contributor.authorGuerra C.
dc.contributor.authorSancy M.
dc.contributor.authorWalczak M.
dc.contributor.authorMartínez C.
dc.contributor.authorRinguedé A.
dc.contributor.authorCassir M.
dc.contributor.authorHan J.
dc.contributor.authorOgle K.
dc.contributor.authorde Melo H.G.
dc.contributor.authorSalinas V.
dc.contributor.authorAguilar C.
dc.date.accessioned2020-09-02T22:19:30Z
dc.date.available2020-09-02T22:19:30Z
dc.date.issued2020
dc.identifier10.1016/j.msec.2020.110758
dc.identifier.citation111, , -
dc.identifier.issn09284931
dc.identifier.urihttps://hdl.handle.net/20.500.12728/4761
dc.descriptionPorous titanium materials have gained interest as prosthesis materials due to their similar mechanical properties to the human bone, biocompatibility, and high corrosion resistance. The presence of pores in the metal matrix implies a decrease in the elastic modulus and an increase in the active area, perhaps improving the osseointegration. Corrosion resistance is a critical consideration as corrosion may lead not only to mechanical failure but also the release of ions and/or particles to the bloodstream. In this work, a novel Ti-Nb-Ta-Fe-Mn alloy with varying percentage of porosity (25, 31 and 37 v/v%) was exposed to simulated body fluid (SBF) at 37 °C and its corrosion resistance was investigated using electrochemical techniques and surface analysis as a function of exposure time. Open circuit potential and polarization curves revealed that the effect of porosity was mainly on the shift of the corrosion potential to more negative values with a slight increase in the anodic current. A passive range was also observed, which was not influenced either by increased exposure time or increased porosity. Therefore, a change in the surface specific area could have taken place during the exposure, which is not necessarily related to a corrosion process. Moreover, a typical porous electrode behavior was identified by electrochemical Impedance spectroscopy, without any significant change over time. No release of metal ions was detected by on line ICP-AES, either at the open circuit potential or upon polarizing the samples up to 2 V vs. SCE, whereas only traces elements (Fe and Mn 1 nmol/s cm2) were detected in the electrolyte accumulating all released ions during 30 days of exposure. Additionally, the surface analysis showed thickening of the oxide layer with exposure time. Therefore, the stability of the passive layer and low release of ions indicate that the porous alloys are suitable for further study as prosthesis materials. © 2020 Elsevier B.V.
dc.language.isoen
dc.publisherElsevier Ltd
dc.subjectElectrochemical
dc.subjectJoint implants
dc.subjectPorous electrode
dc.subjectTi-based alloys
dc.subjectAtomic emission spectroscopy
dc.subjectBiocompatibility
dc.subjectBody fluids
dc.subjectCorrosion resistance
dc.subjectCorrosion resistant alloys
dc.subjectElectrochemical corrosion
dc.subjectElectrochemical electrodes
dc.subjectElectrochemical impedance spectroscopy
dc.subjectElectrolytes
dc.subjectFailure (mechanical)
dc.subjectIron alloys
dc.subjectMetal implants
dc.subjectMetal ions
dc.subjectMetals
dc.subjectNiobium alloys
dc.subjectPorosity
dc.subjectProsthetics
dc.subjectSurface analysis
dc.subjectTantalum alloys
dc.subjectTitanium alloys
dc.subjectCorrosion potentials
dc.subjectElectrochemical
dc.subjectElectrochemical techniques
dc.subjectJoint implants
dc.subjectOpen circuit potential
dc.subjectPorous electrodes
dc.subjectSimulated body fluids
dc.subjectTi based alloy
dc.subjectManganese alloys
dc.titleEffect of added porosity on a novel porous Ti-Nb-Ta-Fe-Mn alloy exposed to simulated body fluid
dc.typeArticle


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