Corrosion behavior of plasma electrolytically oxidized gamma titanium aluminide alloy in simulated body fluid
By Rodriguez, L. Lara; Sundaram, P. A.
Published in Materials Chemistry and Physics
NULL
2016
Abstract
Abstract Plasma electrolytic oxidized (PEO) ?TiAl 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 ?TiAl. 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.
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