Preparation and properties of Ag-carrying micro-arc oxidation ceramic film on pure titanium surface

Abstract

Ag-carrying micro-arc oxidation ceramic film was prepared on the surface of pure titanium by combining micro-arc oxidation and hydrothermal treatment to improve its wettability, corrosion resistance and impart antibacterial properties. The MAO film was characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The hydrophilicity of the film was evaluated by contact angle test. The corrosion resistance of the film was evaluated by electrochemical test, and the antibacterial property was analyzed by the antibacterial property test. The results show that the surface morphology of Ag-carrying MAO film remains volcanic porous structure. Nano-scale Ag particles are evenly distributed around the pores. The surface of Ag-carrying MAO film is mainly TiO2 and nano-Ag particles. The hydrophilicity of the Ag-carrying MAO film is 77.0% higher than that of pure titanium, and 68.2% higher than that of MAO film. The self-corrosion potential of Ag-carrying MAO film increases by 0.44 V and 0.31 V compared with pure titanium and MAO film. The antibacterial rate of MAO film is 32.2%. The antibacterial rate of Ag-carrying micro-arc oxidation MAO film is more than 99.9% and has excellent antibacterial property.

Keywords

• pure titanium
• ag-carrying
• micro-arc oxidation
• corrosion resistance
• antibacterial property