Formation of TiO2 nanoporous layer on the surface of Ti13Nb13Zr titanium alloy treated by ECAP-Conform and Rotary Swaging

Abstract

This paper focuses on the formation of nanoporous layer on the surface of the third-generationbiomedical Ti13Nb13Zr titanium alloy widely used in the biomedical field. First of all, the alloy was asubject to equal channel angular pressing (ECAP) + conform treatment (ECAP-Conform) and RotarySwaging forging. Then the anodic oxidation method with 0.5 wt% HF electrolyte was used to preparea uniformly arranged porous layer on the surface of the samples with the different microstructurefrom EACP-Conform. The features of the formed porous layer were investigated. The effects ofoxidation time and oxidation voltage on the porous morphology of the surface porous layer wereinvestigated in detail. The optimal anodic oxidation parameters for the formation of surface porouslayer were established. The hydrophobic properties of the samples were tested and the contact angleswere calculated. Finally, the weightlessness of body fluid corrosion in Hanks´ solution was simulated.