Corrosion and antimicrobial property of TiO2/Cu2O and TiO2/Cu2O@CeO2 micro-arc oxidation coatings on Ti-6Al-4V alloys in natural seawater
Microarc oxidation is an effective surface treatment for improving certain properties of metals and their alloys.In this paper,TiO2/Cu2O and TiO2/Cu2O@CeO2 coatings were prepared on Ti-6Al-4V by microarc oxidation.The coatings exhibited good corrosion resistance and antimicrobial properties.X-ray diffraction(XRD),scanning electron microscopy(SEM),and 3D laser confocal were used to characterize the coatings.The properties of TiO2/Cu2O and TiO2/Cu2O@CeO2 coatings were analyzed,including microstructure,surface roughness,corrosion resistance,and antimicrobial properties.The electrochemical results showed that the coatings prepared by microarc oxidation had enhanced corrosion resistance compared to the substrate.The antibacterial properties of TiO2/Cu2O and TiO2/Cu2O@CeO2 coating against Pseudomonas aeruginosa were evaluated by fluorescence microscopy and plate counting.The antibacterial rate of TiO2/Cu2O@CeO2 coating was up to 99.70％.In summary,the TiO2/Cu2O and TiO2/Cu2O@CeO2 coatings prepared by microarc oxidation have a potential application background in the field of marine corrosion protection and biofouling.
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