Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/31426

TitleHow do titanium and Ti6Al4V corrode in fluoridated medium as found in the oral cavity? An in vitro study
Author(s)Souza, J. C. M.
Barbosa, S. L.
Ariza, E.
Henriques, Mariana
Teughels, W.
Ponthiaux, Pierre
Celis, J. P.
Rocha, L. A.
KeywordsTitanium
Fluoride
Ti6Al4V
Electrochemical tests
Surface analysis
Issue date2015
PublisherElsevier B.V.
JournalMaterials Science and Engineering: C
CitationSouza, J. C. M.; Barbosa, S.; Ariza, E.; Henriques, Mariana; Teughels, W.; Ponthiaux, P.; Celis, J. -P.; Rocha, L. A., How do titanium and Ti6Al4V corrode in fluoridated medium as found in the oral cavity? An in vitro study. Materials Science and Engineering: C, 47, 384-393, 2015
Abstract(s)The purpose of this work was to evaluate the corrosion of commercially pure (CP) titanium and Ti6Al4V in vitro at different F− concentrations regularly found in the oral cavity by using different electrochemical tests and surface analysis techniques. electrochemical impedance spectroscopy (EIS), open circuit potential (OCP) and potentiodynamic polarization tests were associated to advanced characterization techniques such as SEM, EDS, AFM, ICP-MS and XPS. OCP tests revealed a higher reactivity of both CP titanium and Ti6Al4V at 12,300 ppm F− concentration than that recorded at 227 ppm F−. Also, a significant decrease of the corrosion resistance of both materials was noticed by EIS in fluoride solutions.Material loss caused by corrosionwas noticed on titaniumsurfaces by SEM and AFM in the presence of high F− concentration. CP titanium degraded by pitting corrosion while Ti6Al4V suffered fromgeneral corrosion showing micro-cracks on surface. Furthermore, a high release of metallic ions from the test samples after immersion at high F− concentrations was detected by ICP-MS, that can be potentially toxic to oral tissues.
TypeArticle
URIhttp://hdl.handle.net/1822/31426
DOI10.1016/j.msec.2014.11.055
ISSN0928-4931
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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