Abstract
The aim of this study was to investigate the influence of different process parameters as chemical composition, the pH value and immersion time on the corrosion of the some TiMoNb alloys, using different electrochemical techniques such as: cyclic voltammetry, open circuit potential (OCP) measurement, polarization curves and electrochemical impedance spectroscopy (EIS). The alloys were analyzed in the natural pH of the Ringer solution, but also with an acidic modification of the solution (ph = 4) and a basic modification (ph = 8). The more acidic values of pH, the more evident are differences between corrosion behavior of titanium-based alloys depending on their chemical compositions and immersion times.
Highlights
Titanium and its alloys are intensively studied in dental medicine due to their excellent biocompatibility, corrosion resistance and relatively low density [1]
The purpose of this study is to highlight the influence of different process parameters, such as pH of the electrochemical medium, chemical composition of alloys, immersion time on the corrosion behavior of investigated alloys
The results of the electrochemical tests highlighted the relationship between corrosion parameters (EOCP, Ecorr, icorr, Rp, R) and process parameters (Nb/Mo ratio, pH and immersion time (IT))
Summary
Titanium and its alloys are intensively studied in dental medicine due to their excellent biocompatibility, corrosion resistance and relatively low density [1]. Attempts to use titanium in the manufacture of implants date from the 1930 [2]. Metals such as Zr, Mo, Ni, Nb, Ta are elements that may be present in titanium alloys, as they exhibit excellent biocompatibility and belong to the group of non-toxic metals in their interaction with living tissue. These elements are the most suitable alloying elements that can be added to decrease the modulus of elasticity without compromising its mechanical resistance [3,4]. The use of molybdenum is still controversial, but some studies have shown that some Mo-containing Ti alloys can have adequate mechanical compatibility and good cytotoxic compatibility such as Ti-Mo, Ti-Mo-Ta, Ti-Mo-Zr-Fe [8-
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