Titanium-peroxy and peroxide complex functionalities on Ti-6Al-4V alloy effected by modification with active radicals

For the first time, the oxidation of Ti-6Al-4V surface was performed in a liquid environment subjected to ozonation. Based on the XPS spectra collected the oxidative effect of proposed Ti-alloy surface modifica-tion was discussed. It was found a significant increase in the amount of oxygen double-bonded with Ti with simultaneous diminution in C amount. The possible mechanism of the oxidation process is explained as follows: the intensive reaction of ozone with hydroxyl ions present in the reaction elec-trolyte results in the advanced generation of a variety of active radicals occurring in the chain reaction. These reactive species containing oxygen, diffuse to the surface of Ti-alloy, and affects its oxidation with the accompaniment of rebuilding of oxygen bonding with Ti. Within this scenario, the titanium-peroxy and peroxide complexes can be formed on the Ti surface what in part is confirmed by the increased amount of surface oxygen in the surface. (c) 2021 Elsevier Ltd. All rights reserved.

Automated summary

In this study, the oxidation of Ti-6Al-4V surface in a liquid environment subjected to ozonation was investigated. XPS spectra were collected to analyze the oxidative effect of the proposed Ti-alloy surface modification and discussed the possible mechanism of the oxidation process.