Corrosion, mechanical and bioactivity properties of HA-CNT nanocomposite coating on anodized Ti6Al4V alloy

Hydroxyapatite-carbon nanotubes (HA-CNTs) nanocomposite coating was applied by electrophoretic method on anodized Ti alloy to investigate its stability in simulated body fluid (SBF). The biocoating was characterized by using scanning electron microscope (SEM) for microstructure, X-ray diffraction (XRD) for crystallography. The effect of CNTs concentration on the coating properties was also investigated and found out that CNTs up to 5% has various improving effect on the system. It increased corrosion resistance and adhesion of the coating to the substrate and decreased the number of cracks on the coating. The results of the in vitro test showed that the cell viability increased with increasing the concentration of CNTs to 3 wt.% CNTs. [GRAPHICS] .

Automated summary

A hydroxyapatite-carbon nanotubes (HA-CNTs) nanocomposite coating was applied to anodized Ti alloy using an electrophoretic method to investigate its stability in simulated body fluid (SBF). The coating was characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD), and the effect of CNTs concentration on coating properties was studied. The results showed that a CNTs concentration of up to 5% had various improving effects on the corrosion resistance, adhesion, and crack formation of the coating. In vitro tests demonstrated that cell viability increased with increasing CNTs concentration, reaching a maximum at 3 wt.% CNTs.