Fabrication, characterisation and investigation of zirconium oxide corrosion behaviour on resistance of zirconium oxide nanotubes in artificial saliva as biological environment

Zirconia nanotubes were prepared in glycerol electrolytes containing fluoride ion and water via anodisation. The systematic study of the influence of anodising parameters (applied voltage and electrolyte temperature) on the zirconia nanotube diameter and their corrosion resistance in the artificial saliva solution as biological medium at 37±1°C have been demonstrated. Nanotubes were characterised by field emission scanning electron microscopy (FE-SEM). The FE-SEM results show that zirconia nanotubes have an outer diameter of 40–120 nm and inner diameter of 10–60 nm. The corrosion properties of samples were examined by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation tests. The results indicate that zirconium oxide nanotubes that were prepared at 50 V and 5°C demonstrate the best corrosion resistance.