Klekotka Marcin, Dąbrowski Jan Ryszard, Rećko Katarzyna
Institute of Biomedical Engineering, Bialystok University of Technology, Wiejska 45C, 15-351 Bialystok, Poland.
Faculty of Physics, University of Białystok, Ciołkowskiego 1L, 15-245 Białystok, Poland.
Materials (Basel). 2020 Mar 28;13(7):1561. doi: 10.3390/ma13071561.
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.
本文介绍了Ti6Al4V植入合金在天然唾液和自制的基于粘蛋白的人工唾液溶液环境中的微动磨损和微动腐蚀过程的体外研究结果。该研究在专门设计的微动销盘试验机上进行，该试验机与一套用于电化学研究的设备相结合。采用开路电位测量和动电位方法进行腐蚀试验。对磨损表面进行微观观察和磨损评估。使用耗散能量和三体方法对结果进行解释。X射线衍射分析表明，氧化钛占摩擦产物的80%以上。特别关注了唾液及其替代品的作用，在某些情况下，它们会导致微动磨损加剧。基于所得结果，提出了一种新的微动腐蚀过程现象学模型。该模型涉及形成一种磨蚀性糊剂，它是金属氧化物和唾液有机成分的组合。
