Premium
Effect of Ta on the electrochemical behavior of new TiMoZrTa alloys in artificial physiological solution simulating in vitro inflammatory conditions
Author(s) -
Bălţatu S.,
Vizureanu P.,
Mareci D.,
Burtan L. C.,
Chiruţă C.,
Trincă L. C.
Publication year - 2016
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.201609041
Subject(s) - passivation , dielectric spectroscopy , corrosion , materials science , electrochemistry , polarization (electrochemistry) , oxide , chemical engineering , metallurgy , composite material , chemistry , electrode , layer (electronics) , engineering
The present study explores the microstructural characteristics and electrochemical responses of different TiMoZrTa alloys designed for biomedical implantation. The alloys corrosion resistance (potentiodynamic polarization and electrochemical impedance spectroscopy) was determined in acidified Ringer's solution at 37 °C. The pH was adjusted to 3.6 in order to reproduce the pathological state. The new materials formed spontaneously a passivation oxide film on their surface, and they remained stable for polarizations up to +1.0 V SCE . No evidence of localized breakdown of the oxide layers was registered even when higher positive polarizations than those encountered in the human body were applied.