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Electrochemical study and microstructural characterization of titanium experimental binary alloys in 3 concentrations (Ti-5Zr, Ti-10Zr, Ti-15Zr) as a function of artificial saliva and simulator body fluid

Grant number: 14/23575-1
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): May 01, 2015
Effective date (End): April 30, 2016
Field of knowledge:Health Sciences - Dentistry - Oral and Maxillofacial Surgery
Principal researcher:Leonardo Perez Faverani
Grantee:Bruna Regina Gomes Morais
Home Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil


The aim of this in vitro study will be to evaluate the corrosive and microstructural behavior of Ti-Zr alloy with or without surface treatment. The hypothesis to be tested is that the surface treatment (double acid etching) and the test alloy (Ti-5Zr, Ti-10Zr and Ti-15Zr) will create a pattern of corrosion different from those observed on machined-surface and other alloys tested (cpTi and Ti-6Al-4V). For electrochemical test (n=3) 48 discs of cpTi, Ti-6Al-4V, Ti-5Zr, Ti-10Zr and Ti-15Zr will be fabricate and submitted to pattern tests as open circuit potential, electrochemical impedance spectroscopy (EIS) and potenciodynamic tests will be conducted in simulated body fluid (SBF) or artificial saliva. The corrosion current density (Icorr), the passivation current density (Ipass), corrosion potential (Ecorr), capacitance (Cdl) and polarization resistance (Rq) of Ti oxide layer will be determined. The surface of the discs will be characterized by scanning electron microscope (SEM), white-light interferometry, energy dispersive spectroscope (EDS) and Vickers hardness. The energy dispersive spectroscope (EDS) will evaluate the composition of oxides created on the Ti surface. The data will be submitted to the appropriated statistical analysis with 5% of significance.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CORDEIRO, JAIRO M.; FAVERANI, LEONARDO P.; GRANDINI, CARLOS R.; RANGEL, ELIDIANE C.; DA CRUZ, NILSON C.; NOCITI JUNIOR, FRANCISCO H.; ALMEIDA, AMANDA B.; VICENTE, FABIO B.; MORAIS, BRUNA R. G.; BARAO, VALENTIM A. R.; ASSUNCAO, WIRLEY G. Characterization of chemically treated Ti-Zr system alloys for dental implant application. Materials Science & Engineering C-Materials for Biological Applications, v. 92, p. 849-861, NOV 1 2018. Web of Science Citations: 6.

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