Dip Coated of Al2O3 and Graphene Thin Films on 316L Stainless Steel: Tribocorrosion Behaviours

Doping ceramic particles to the substrate surface via dip coating is a very efficient method. By optimizing the variables of this method, the properties of the substrate material (such as wear, corrosion, tribocorrosion) can be improved. Metallic materials with improved these properties are frequently preferred especially in the biomedical field. Considering the invasive implant groups, high surface resistance is required against corrosion and wear mechanisms. The synergistic effect of these two mechanisms can be examined by tribocorrosion experiments. In this study, the tribocorrosion performance of 316 L susbtrate material doped with different ceramic particles (graphene, Al2O3) has been compared. Simulated body fluid (SBF) and 0.9 wt% NaCl were used as tribocorrosion test solutions. As a result of the tests, it has been determined that the corrosive effect is more dominant for the tribocorrosion mechanism in the SBF (more aggressive environment in terms of ion concentration) environment. There is more mass loss in the untreated sample due to adhesive wear. As a result of the synergistic effect of corrosion and wear mechanisms, maximum mass loss was detected in the untreated sample. The wear and corrosion resistance contribution of graphene and alumina (Al2O3) particles is very close in quantitative terms.