Effect of Ta on the electrochemical behavior of new TiMoZrTa alloys in artificial physiological solution simulating in vitro inflammatory conditions

Abstract

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 VSCE. 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.

Corrosion of Ti35Zr28Nb in Hanks’ solution and 3.5 wt% NaCl solution

“…Cvijović‐Alagić et al studied the electrochemical behaviour of Ti6Al4V, with different microstructures in a simulated bio‐environment. Bălţatu et al studied the effect of Ta on the electrochemical behaviour of Ti5Mo7Zr5‐15Ta in artificial physiological solutions.…”

Electrochemical corrosion behavior of Ti‐10V‐2Fe‐3Al in different corrosive media

“…Although, most of them are studied in physiological solution, few studies are carried out in sea water, acid, and other solutions. The corrosion behavior of most Ti alloys in physiological solution is generally similar . Spontaneous passivation of these alloys in simulated body fluid is noted for most of these alloys.…”

Topical Notions About in Vivo Analysis for Degradable Biomaterials with Utility in Human Body

“…But it is difficult to choose the best alloy and, to do this, we need more in vitro and in vivo experiments such as clinical investigations [16,[20][21][22][23][24][25].…”