subjected to cyclic thermal loading in corrosive environments (3.5 wt% NaCl and Ringer
Thermogravimetric measurement versus temperature is perfumed to obtain forward and
reverse martensitic transformation temperatures.
Electrochemical Avesta cell is used to study corrosion behavior of NiTi alloy under thermal
cycling in absence of mechanical loading. Electrochemical Impedance Spectroscopy and cyclic
voltammetry measurements are used to study corrosion behavior at different temperatures
The change in corrosion rate during phase transformations are being investigated. An
equivalent circuit model is used to calculate the electrochemical parameters from EIS
measurements for forward and reverse martensitic transformations. The results shows the
breakdown of passive oxide film on the surface with martensitic transformation. This
breakdown would be an origin for fatigue crack initiation and an explanation for fatigue lifetime
reduction of NiTi in corrosive environments.