Fretting and Fretting Corrosion Processes of Ti6Al4V Implant Alloy in Simulated Oral Cavity Environment

Abstract

The paper presents the results of in vitro studies of fretting and fretting corrosion processes of Ti6Al4V implant alloy in the environment of natural saliva and self-made mucin-based artificial saliva solutions. The study was performed on a specially designed fretting pin-on-disc tester, which was combined with a set used for electrochemical research. The open circuit potential measurements and potentiodynamic method were used for corrosion tests. The worn surfaces were subjected to microscopic observations and an evaluation of wear. Results were interpreted using the dissipated energy and third-body approaches. The X-ray diffraction analysis showed that titanium oxides constitute over 80% of the friction products. Special attention was paid to the role of saliva and its substitutes, which in certain cases can lead to the intensification of fretting wear. On the basis of the received results, a new phenomenological model of fretting corrosion processes was proposed. This model involves the formation of an abrasive paste that is a combination of metal oxides and the organic components of saliva.

Fretting-corrosion Apparatus with Low Magnitude Micro-motion (≤5 µm): Development and Preliminary Outcome

“…These differences were within the expectation since the amplitude used in this study is only 25-fold smaller than 50 µm. Furthermore, compared to the results reported by Klekotka et al [52], our OCP evolution showed fewer uctuations, and the worn surface had less damage despite the fact that a similar adhesive wear mode was observed, which might also be because the researchers investigated the fretting performance under a much larger movement amplitude (100 µm). Even though these previous studies were conducted under different conditions, comparisons made in this section are to con rm that the results derived from our customized set-up are reasonable and valid.…”

Influence of dilution and addition of soda water on the corrosion resistance of orthodontic wires immersed in artificial saliva in presence of Copper Barrel, a hard drink

“…Mindivan et al have studied the Microstructure and tribocorrosion properties of pulsed plasma nitrided cast CoCr alloy for dental implant applications [5]. Fretting and fretting corrosion processes of Ti6Al4V implant alloy in simulated oral cavity environment have been investigated by Klekotka et al [6]. The effect of Cudoping on the corrosion behavior of NiTi alloy arch wires under simulated clinical conditions has been reported by Wang et al [7].…”