Corrosion Study of Ti5Al4V and Ti6Al4V in Different Simulated Body Fluids

  • M. P. NikolovaEmail author
  • E. H. Yankov
Part of the Advanced Structured Materials book series (STRUCTMAT, volume 98)


The (α + β) Ti6Al4V alloy is widely used in different industrial applications and in medicine. The decrease in the content of the α-strengthening element Al in Ti5Al4V as opposed to conventional Ti6Al4V alloy reduces the hardness as Al is a solid solution hardener but simultaneously, the alloy is expected to have lower cytotoxicity, improved plasticity and low precipitation hardening ability at precipitation temperature. The role of the alloying elements and the influence of heat treatment on corrosion resistance of Ti5Al4V and Ti6Al4V alloys have been studied after a short and long-term immersion in Ringer (RS), phosphate buffer saline (PBS) with and without the addition of H2O2, and 5 M HCl at 37 ± 0.1 °C. It has been found out that lower pH and higher Cl concentration in RS make the surface of the alloys more prone to pitting corrosion and showing nobler corrosion potentials at the same time, in contrast to PBS where salt films of insoluble products are formed on some pits. The potentiodynamic polarisation measurements show higher anodic reaction rate after a 30-days’ period of immersion in PBS and H2O2 for both alloys. The dissolution of Ti, Al, and V and oxidation in 5 M HCl are the highest for solution treated Ti6Al4V and Ti5Al4V alloys, while the corrosion rate for the 10-days’ period in the acid was the lowest for the as-received Ti5Al4V.


Ti6Al4V Heat treatment Microstructure Pits SEM-EDS Corrosion behavior 



The study was supported by contract of University of Ruse “Angel Kanchev”, № BG05M2OP001-2.009-0011-C01, “Support for the development of human resources for research and innovation at the University of Ruse “Angel Kanchev”. The project is funded with support from the Operational Program “Science and Education for Smart Growth 2014–2020” financed by the European Social Fund of the European Union.


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Material Science and TechnologyUniversity of Ruse “A. Kanchev”RuseBulgaria

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