The electrochemical behaviour of titanium dissolution and passivation in HCl was examined with and without the SCN − anions using potentiodynamic polarisation, electrochemical impedance spectroscopy, and current transients techniques. The nature of the Ti oxide film was characterised by utilising XPS and SEM tools. The corrosion current i corr , the critical passivation current i cc , and the passive current i pass values increased significantly when the HCl concentration, scan rate, and temperature were raised. On the contrary, the addition of SCN − anions decreases the i corr value, indicating that the Ti dissolution was inhibited as a result of SCN − adsorption on the Ti surface. The inhibition efficiency increased with increasing the concentration of SCN − . However, SCN − anions lead to destabilised passivity in the passive zone. The formation of the Ti oxide film is a diffusion-controlled operation, as shown by the i-t curves. According to the XPS measurements, the passive oxide coating consists mainly of TiO 2 and less of Ti 2 O 3 .
High entropy alloys are a new type of multi-component material with improved mechanical properties that could be useful in medical implants. The corrosion behavior of a biomedical Ti 70 Zr 20 Nb 7.5 Ta 2.5 alloy was examined and matched with that of commercial Ti and the traditional biomaterial Ti6Al4V in arti cial saliva. Moreover, the impact of different pH and concentrations of uoride ions on the corrosion behavior of Ti 70 Zr 20 Nb 7.5 Ta 2.5 was also investigated. The E corr decreases in the following order: Ti 70 Zr 20 Nb 7.5 Ta 2.5 > Ti6Al4V > Ti. The steady state potential of the OCP, indicates that the corrosion resistance decreases in the same order: Ti 70 Zr 20 Nb 7.5 Ta 2.5 > Ti6Al4V > Ti. The Ti 70 Zr 20 Nb 7.5 Ta 2.5 immersed in saliva at low pH (pH 2.0) and a high uoride ion concentration (2000 ppm) suffers from cracking and exhibits the lowest resistance to corrosion compared to the sample immersed in the saliva without and with low concentrations of uoride ions (0-1000 ppm) and at high pH values (5.0 and 7.0). This data reveals that if the uoride ion concentrations are enhanced or the pH falls, the alloy corrosion resistance reduces. The EIS data shows that the passive layer is made up of a duplex outer and inner oxide layer and that the alloy's resistance to corrosion in uoride-containing solutions has been signi cantly reduced. Additionally, the data demonstrates that a Ti 70 Zr 20 Nb 7.5 Ta 2.5 alloy's corrosion resistance rises with increasing immersion time with and without uoride ions. According to the X-ray photoelectron spectroscopy investigation, the protective passive oxides include TiO 2 , ZrO 2 , Nb 2 O 5 , and Ta 2 O 5 . The alloy Ti 70 Zr 20 Nb 7.5 Ta 2.5 can be considered as a promising material suitable for usage as a biomaterial among all the materials tested in this work.
Because of their superior biocompatibility, chemical stability, and mechanical strength, Ti and Ti - based alloys are commonly utilized in orthopaedic dentistry. In Ringer’s solution (RS), the corrosion behavior of the Ti70Zr20Nb7.5Ta2.5 (T70Z20N7.5T2.5) alloy was examined as an alternative potential material for Ti and Ti6Al4V (T6A4V) in medical applications. The corrosion resistance was evaluated utilizing potentiodynamic polarization curves (PPCs), electrochemical impedance spectroscopy (EIS), and open circuit potential techniques (OCP), supplemented by XRD and SEM surface analysis. The T70Z20N7.5T2.5 alloy has the highest resistance to corrosion since it has the most stable passive state in addition to the lowest corrosion current (Icorr) and the highest corrosion potential (Ecorr) in comparison with that of T6A4V and Ti. Furthermore, it was also looked at how different annealing temperatures (600, 800, and 1000 ºC) and immersion times (one, two, and three weeks) affected the corrosion behaviour of T70Z20N7.5T2.5. In comparison to the other samples, the T70Z20N7.5T2.5 alloy annealed at 800 ºC demonstrated superior resistance to corrosion (the lowest Icorr and Ipass). While that annealed at 1000 ºC has the lowest resistance to corrosion (highest Icorr and Ipass) as a result of the passive layer dissolution. The same results are confirmed using the OCP measurements. The passive film is composed of an inner and outer oxide layer, according to the EIS measurements. Meanwhile, the PPCs data demonstrates that the resistance to corrosion of the alloy is higher without immersion than it is with immersion and for a shorter immersion time. These results entirely agree with those of the EIS and OCP measurements of the alloy at the same immersion times. It was found that the T70Z20N7.5T2.5 system consisted of α and β phases. An X-ray structural study indicated a mixture of body centred –cubic β-Ti and hexagonal close-packed α-Ti (main phase, with a grain size of about 5.35 nm). Therefore, among all the materials evaluated in this work, the T70Z20N7.5T2.5 alloy can be considered a promising material suitable for use as a biomaterial.
Because of their superior biocompatibility, chemical stability, and mechanical strength, Ti and Ti -based alloys are commonly utilized in orthopaedic dentistry. In Ringer ' s solution (RS), the corrosion behavior of the Ti 70 Zr 20 Nb 7.5 Ta 2.5 (T 70 Z 20 N 7.5 T 2.5 ) alloy was examined as an alternative potential material for Ti and Ti 6 Al 4 V (T 6 A 4 V) in medical applications. The corrosion resistance was evaluated utilizing potentiodynamic polarization curves (PPCs), electrochemical impedance spectroscopy (EIS), and open circuit potential techniques (OCP), supplemented by XRD and SEM surface analysis. The T 70 Z 20 N 7.5 T 2.5 alloy has the highest resistance to corrosion since it has the most stable passive state in addition to the lowest corrosion current (I corr ) and the highest corrosion potential (E corr ) in comparison with that of T 6 A 4 V and Ti. Furthermore, it was also looked at how different annealing temperatures (600, 800, and 1000 ºC)and immersion times (one, two, and three weeks) affected the corrosion behaviour of T 70 Z 20 N 7.5 T 2.5 . In comparison to the other samples, the T 70 Z 20 N 7.5 T 2.5 alloy annealed at 800 ºC demonstrated superior resistance to corrosion (the lowest I corr and I pass ). While that annealed at 1000 ºC has the lowest resistance to corrosion (highest I corr and I pass ) as a result of the passive layer dissolution. The same results are con rmed using the OCP measurements. The passive lm is composed of an inner and outer oxide layer, according to the EIS measurements. Meanwhile, the PPCs data demonstrates that the resistance to corrosion of the alloy is higher without immersion than it is with immersion and for a shorter immersion time. These results entirely agree with those of the EIS and OCP measurements of the alloy at the same immersion times. It was found that the T 70 Z 20 N 7.5 T 2.5 system consisted of α and β phases. An X-ray structural study indicated a mixture of body centred -cubic β-Ti and hexagonal close-packed α-Ti (main phase, with a grain size of about 5.35 nm). Therefore, among all the materials evaluated in this work, the T 70 Z 20 N 7.5 T 2.5 alloy can be considered a promising material suitable for use as a biomaterial.
High entropy alloys are a new type of multi-component material with improved mechanical properties that could be useful in medical implants. The corrosion behavior of a biomedical Ti70Zr20Nb7.5Ta2.5 alloy was examined and matched with that of commercial Ti and the traditional biomaterial Ti6Al4V in artificial saliva. Moreover, the impact of different pH and concentrations of fluoride ions on the corrosion behavior of Ti70Zr20Nb7.5Ta2.5 was also investigated. The Ecorr decreases in the following order: Ti70Zr20Nb7.5Ta2.5 > Ti6Al4V > Ti. The steady state potential of the OCP, indicates that the corrosion resistance decreases in the same order: Ti70Zr20Nb7.5Ta2.5 > Ti6Al4V > Ti. The Ti70Zr20Nb7.5Ta2.5 immersed in saliva at low pH (pH 2.0) and a high fluoride ion concentration (2000 ppm) suffers from cracking and exhibits the lowest resistance to corrosion compared to the sample immersed in the saliva without and with low concentrations of fluoride ions (0-1000 ppm) and at high pH values (5.0 and 7.0). This data reveals that if the fluoride ion concentrations are enhanced or the pH falls, the alloy corrosion resistance reduces. The EIS data shows that the passive layer is made up of a duplex outer and inner oxide layer and that the alloy's resistance to corrosion in fluoride-containing solutions has been significantly reduced. Additionally, the data demonstrates that a Ti70Zr20Nb7.5Ta2.5 alloy's corrosion resistance rises with increasing immersion time with and without fluoride ions. According to the X-ray photoelectron spectroscopy investigation, the protective passive oxides include TiO2, ZrO2, Nb2O5, and Ta2O5. The alloy Ti70Zr20Nb7.5Ta2.5 can be considered as a promising material suitable for usage as a biomaterial among all the materials tested in this work.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.