Femtosecond laser induced periodic nanostructures towards enhanced anti-corrosive property of titanium

Femtosecond laser was employed to induce periodic nanostructures on the surface of titanium to improve its corrosion resistance. The effect of the induced structures on the corrosion resistance of the titanium was investigated. The micromorphology, wetting and microstructural features (e.g., phase content, grain size and grain boundary) and corrosion behavior of the titanium surface before and after femtosecond laser treatment were systematically investigated. The results revealed that femtosecond laser induced periodic nanostructures enhanced the corrosion resistance of the titanium in 3.5 % NaCl solution. The potential mechanisms could be attributted to the low proportion of high-angle grain boundaries (HAGBs), the formation of passive film with higher fraction of TiO2 and the air cushion effect on structured surface, which slows down the corrosion rate.

Automated summary

Femtosecond laser was used to create periodic nanostructures on titanium surface, improving its corrosion resistance. The influence of these induced structures on titanium's corrosion resistance was investigated. The study systematically examined the micro-morphology, wetting, microstructural features, and corrosion behavior of the titanium surface before and after femtosecond laser treatment. Results showed that the induced periodic nanostructures enhanced the corrosion resistance of the titanium in a 3.5% NaCl solution through mechanisms such as the low proportion of high-angle grain boundaries, formation of a passive film with higher TiO2 fraction, and the air cushion effect on the structured surface, which reduced the corrosion rate.