Corrosion behavior of plasma electrolytically oxidized gamma titanium aluminide alloy in simulated body fluid.

Author(s) Rodriguez, L.; Sundaram, P.A.
Journal Mater Chem Phys
Date Published 2016 Sep 15
Abstract

Plasma electrolytic oxidized (PEO) γTiAl alloy samples were electrochemically characterized by open circuit potential (OCP), cyclic polarization and electrochemical impedance spectroscopy (EIS) to evaluate their corrosion resistance in simulated body fluid (SBF) in order to gauge their potential for biomedical applications. Experimental results through OCP and cyclic polarization studies demonstrated the protective nature and the beneficial effect of the PEO coatings on γTiAl. The PEO surface increased corrosion resistance of these surface modified alloys. EIS data indicated the presence of an underlying compact oxide layer with surface pores represented by two domes in the Nyquist plots. Electrical equivalent circuits to describe the EIS results are proposed.

DOI 10.1016/j.matchemphys.2016.06.034
ISSN 0254-0584
Citation L Rodriguez L, Sundaram PA. Corrosion behavior of plasma electrolytically oxidized gamma titanium aluminide alloy in simulated body fluid. Mater Chem Phys. 2016;181:67-77.

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