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The estimation of corrosion behavior of new TiNbTaZr alloys for biomedical applications
Author(s) -
Bărbînţă A. C.,
Mareci D.,
Chelariu R.,
Bolat G.,
Munteanu C.,
Cho K.,
Niinomi M.
Publication year - 2014
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201307294
Subject(s) - dielectric spectroscopy , corrosion , materials science , alloy , polarization (electrochemistry) , scanning electron microscope , electrochemistry , electrical impedance , anode , metallurgy , analytical chemistry (journal) , composite material , chemistry , electrode , chromatography , electrical engineering , engineering
The corrosion behavior of two TiNbTaZr alloys (Ti25Nb8Ta10Zr and Ti21Nb15Ta6Zr) in Dulbecco's minimum essential medium (MEM) are evaluated and its protective ability is compared with that of Cp‐Ti, to ascertain their stability for biomedical application. All the samples were examined using electrochemical techniques: electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization curves. The electrochemical corrosion parameters obtained from the EIS and potentiodynamic polarization curves indicated a typical passive behavior for TiNbTaZr alloys. In addition, scanning electron microscopy was employed to observe the surface morphology after polarization test in MEM solution. Low anodic current density values were obtained from the polarization curves, indicating a typical passive behavior for TiNbTaZr alloys. EIS studies showed high impedance values for all samples, increasing with exposure time. The Ti21Nb15Ta6Zr alloy appears to possess superior corrosion resistance than the Ti25Nb8Ta10Zr alloy and Cp‐Ti in MEM solution.