Abstract
The anti-corrosion properties of Ti 44Ni 47Nb 9 shape memory alloy in simulated body fluids including 0.9% NaCl, Hank's and artificial saliva solutions at pH 2.4, 5.4 and 7.4 are investigated by electrochemical measurements. X-ray photoelectron spectroscopy (XPS) is used to characterize the composition and in-depth distribution of the passive films on the alloy as well as their compositional changes before and after linear polarization measurement with the aim to reveal the corrosion mechanism of the Ti 44Ni 47Nb 9 alloy. The open circuit potential (OCP) increases after adding Nb to TiNi alloy. In 0.9% NaCl solutions, the OCP decreases with increasing pH value and it is contrary for artificial saliva solution. Linear polarization results show that pH values and corrosion solutions have different effect on corrosion behaviour of Ti 44Ni 47Nb 9 alloy. The XPS results verify that after linear polarization the passive film forms on the surface of Ti 44Ni 47Nb 9 consisting of TiO 2 and Nb 2O 5. The experimental results prove that the electrochemical corrosion behaviour of TiNi alloy is improved after adding Nb. This implies that Ti 44Ni 47Nb 9 alloy may be used as a promising implant material.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
