Formation of High Corrosion Resistant Nanotubular Layers on Titanium Alloy Ti13Nb13Zr

Abstract

This paper presents results of oxidation tests and corrosion investigations of titanium alloy Ti13Nb13Zr performed at different conditions. The oxide layers have been formed by electrochemical method in 2M H3PO4 + 0.3% HF solution for 30 min. and 1 h at 20 V constant voltage. The corrosion tests have been made by potentiodynamic method in Ringer`s solution at pH ranged between 3 and 7. It has been shown that the nanooxide films, which improve corrosion resistance of titanium alloy Ti13Nb13Zr even if acidic environment, have appeared.

Production and Characterization of the Third-Generation Oxide Nanotubes on Ti-13Zr-13Nb Alloy

“…The obtained porous SWNTs show a morphology very similar to bone tissue structures. The new, additionally produced top SWNTs layer is designed to accelerate the osseointegration process, reduce the risk of the releasing of harmful compounds from the implant into the body, and the occurrence of inflammation [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 25 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 48 , 49 ]. In line with the latest trends in implantology, the layer of oxide nanotubes can be a carrier for drugs delivered to a specific location and enable their controlled release into the body at a specific rate, depending on the size of the SWNTs [ 12 , 29 , 41 ].…”

“…Currently, intensive research is carried out to develop innovative surface modification methods of the biomedical Ti-13Zr-13Nb alloy to increase its bioactivity, biocompatibility, and long-term stability [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ]. Electrochemical modification can carry out additional functionalization of the Ti-13Zr-13Nb alloy surface, increasing its osteoinductive properties for applications in regenerative medicine and intelligent drug delivery systems [ 29 ].…”

“…A self-passive oxide layer on the Ti-13Zr-13Nb alloy surface and its electrochemical properties play an essential role in the long-term implantation [ 15 ]. The biocompatible properties of the Ti-13Nb-13Zr alloy can be additionally improved by creating a porous oxide layer on its surface using electrochemical methods [ 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ]. Obtaining a porous surface of the Ti-13Zr-13Nb alloy enables the development of innovative long-term implants with increased osteoinductive properties.…”

“…Oxide layers on the Ti-13Zr-13Nb substrate formed in two-stage anodization in phosphoric acid (first stage) and the presence of hydrofluoric acid (second stage) were also the subject of their research [ 33 ]. An attempt was made to oxidize the solid and porous Ti-13Zr-13Nb alloy in H 3 PO 4 with the addition of HF to form high corrosion-resistant nanotubular layers [ 34 , 35 ]. The ONTs with controlled morphology, length, and diameter on the Ti-13Nb-13Zr alloy were also obtained by anodizing room temperature in hydrofluoric acid solution [ 36 ], in (NH 4 ) 2 SO 4 + NH 4 F solution [ 37 , 38 , 39 , 40 ], and in ethylene glycol solution with the addition of NH 4 F [ 41 ].…”

Anodic oxidation of the Ti–13Nb–13Zr alloy

“…Anodic treatment of the Ti13Nb-13Zr alloy is not widely described in the accessible literature. Investigations on electropolishing [30], preparation of the nanotubular oxide layers [31][32][33], and plasma electrolytic oxidation were conducted up to now [34][35][36][37][38]. Preparation of thin oxide layers on the Ti-13Nb-13Zr alloy was investigated by voltammetry but up to only 8 V [39,40].…”