The Contribution of Electrochemistry for a Better Understanding of the Degradationby Tribocorrosion of Metallic Implant Materials

Archives of Metallurgy and Materials

article

L. Benea¹ 

[1] Dunarea de Jos University of Galati, Faculty of Engineering, Competences Centre: Interfaces-Tribocorrosion-Electrochemical Systems

关键词: Tribocorrosion;    Biological fluids;    Biomaterials;    Nano composite layer;    Electrochemical methods;   

DOI  :  10.24425/amm.2022.137789

学科分类：物理（综合）

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

In this paper there are presented some results obtained by open circuit potential and electrochemical impedance spectroscopymeasurements from studies performed on the behavior of tribocorrosion on metallic implant biomaterials as: 304L stainless steel,Co/nano-CeO2 nanocomposite layer and Ti6Al4V untreated and oxidized alloy to form a nanoporous TiO2 film. The open circuitpotential technique used in measuring the tribocorrosion process provide information on the active or passive behavior of the investigated metallic biomaterial in the biological fluid, before, during friction and after stopping the friction. Thus it clearly showa better behavior of Co/nano-CeO2 nanocomposite coatings as compared with 304L stainless steel to tribocorrosion degradationin Hank solution; as well the better behavior of nanoporous TiO2 film formed annodically on Ti6Al4V alloy surface as comparedwith untreated alloy to tribocorrosion degradation in artificial saliva Fusayama Meyer. The slight decrease in polarization resistancevalue resulted from electrochemical impedance spectroscopy measured during friction in the case of the Co/nano-CeO2 nanocomposite layer (four times smaller), compared to 304L stainless steel, whose polarization resistance decreased more than 1000 timesduring friction shows the higher sensitivity of stainless steel to degradation by tribocorrosion. The same behavior is observed whencomparing the polarization resistance of untreated titanium alloy recorded during friction that is about 200 hundred times smaller,while the specific polarization resistance of the oxidized alloy with the nanoporous film of titanium oxide, decreases very littleduring friction, highlighting the beneficial effect of modifying the titanium alloy by anodic oxidation to increase its resistance tothe degradation process by tribocorrosion.

【 授权许可】

CC BY-NC