Influence of incremental rate of anodising current on roughness and electrochemical corrosion of oxide film on titanium alloy Ti–10V–2Fe–3Al

Abstract

In this study, the influence of incremental rate of anodising current V IR on the crystal structure, surface roughness and corrosion resistance of anodic oxide films on Ti-10V-2Fe-3Al was studied using Raman spectroscopy, atomic force microscopy (AFM), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation. The results showed that the surface roughness, crystal structure and electrochemical corrosion behaviour of anodic oxide films were remarkably affected by different V IR with regard to the change in the rate of anodising voltage. In addition, results of EIS and potentiodynamic polarisation revealed that the film that formed at V IR of 0?50 A min 21 had the highest corrosion resistance. Quantitative AFM characterisation showed good correlation between surface roughness and EIS results. Furthermore, results of Raman spectroscopy showed that the relative intensity of anatase and rutile had a tendency to increase with a decrease in V IR before reaching 0?50 A min 21 .

Influence of Electrolyte Temperature on Morphology and Properties of Composite Anodic Film on Titanium Alloy Ti-10V-2Fe-3Al

“…Figure 6 shows the voltage-time curve for composite anodic films fabricated in the electrolyte at different electrolyte temperatures. Usually, the curve can be divided into three stages [36]: (i) the voltage linear increases (0~4 min), (ii) the voltage fluctuates to stability (4~10 min) and (iii) the voltage reaches a stable value (10~65 min). This phenomenon is attributed to the change of the resistance during the growth of the film.…”

Electrochemical stability of binary TiNb for biomedical applications

“…This hypothesis was confirmed in the scanning carried out at 60 d of immersion, where the electrical behavior showed two time constants for titanium, niobium and for the Ti-40Nb alloy. This time constant has been interpreted as being the result of an outer surface layer of the film, according to the bi-layer oxide model [38], where the outer layer is less compact and/or porous than the inner layer [39]. Thus, by the analysis of R p values, titanium showed superior corrosion resistance.…”

Antibacterial potential associated with drug-delivery built TiO2 nanotubes in biomedical implants

“…Physical and chemical treatments for Ti have been proposed in order to obtain surfaces with better biocompatibility. Among these techniques, anodization has been recognized for improving wear and corrosion resistance, as well as increasing TiO 2 surface roughness and surface porosity, with varying thicknesses (Liu et al 2012). In addition, it is considered a methodology that easily reproduces results, being accessible and inexpensive, and also able to facilitate researchers to test their properties with different scientific bases (Awad et al 2017).…”

“…The anodization electrochemical parameters significantly affect film growth behavior and properties. Such features include the type of solution used as electrolyte, reagent concentration, temperature, electrical parameters, anodizing time and solution stirring speed (Liu et al 2004; Cui et al 2009; Liu et al 2012). The anode potential and the electric current can alter the anion transfer process during anodization, as well as determining thickness, surface morphology and microstructure of the anodic coatings (Awad et al 2017; Kunrath et al 2018).…”