Abstract
In this study hydroxylapatite (HA) plasma-sprayed coated Ti-6A1-4V was characterised electrochemicaly, bom under static conditions and cyclic load in two testing environments: Hank’s balanced salt solution (HBSS) and in an isotonic saline solution (0.15 M NaCl). An original method was developed to test these systems under cyclic bending, while immersed in the testing solution.
Samples tested for corrosion-fatigue in Hank’s and isotonic saline solutions were further studied by electrochemical impedance spectroscopy, potentiodynamic polarization and X-ray diffraction. Although no increase in the tendency to corrode was detected in open-circuit corrosion-fatigue experiments, a general tendency to an increase in corrosion kinetics was detected in both a.c and d.c corrosion tests. Structural changes induced by the plasma-spraying procedure or the corrosion-fatigue tests, namely a preferencial dissolution of the coating’s amorphous phase, were also found in X-ray diffraction patterns.
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Reis, R.L., Monteiro, F.J. (1995). Behaviour of HA Coated Ti-6A1-4V under Cyclic Bending in Hank’s and Isotonic Saline Solutions: An Electrochemical and Structural Study. In: Kossowsky, R., Kossovsky, N. (eds) Advances in Materials Science and Implant Orthopedic Surgery. NATO ASI Series, vol 294. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0157-8_12
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DOI: https://doi.org/10.1007/978-94-011-0157-8_12
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