Abstract
The corrosion behavior of newly fabricated γ-TiAl alloy was studied using electrochemical impedance spectroscopy (EIS) and cyclic potentiodynamic polarization (CPP) techniques. The γ-TiAl alloy was produced from powder with compositions of Ti-48Al-2Cr-2Nb processed using electron beam melting (EBM) technique. The corrosion behavior of the bulk alloy was investigated in 1 M HCl solution for different immersion times and temperatures. The experimental results suggest that the fabricated alloy exhibits good resistance to corrosion in acid solution at room temperature. The results also indicate that with an increase in immersion time and solution temperature, the corrosion potential (Ecorr) shifts to a higher positive value, resulting in an increase in corrosion current (jcorr) and consequently a decrease in the corrosion resistance (Rp) of the alloy.
Highlights
The need for increasing the performance and efficiency of engines has led to a huge demand for advanced materials in the aerospace and automobile industry
We investigated the γ-TiAl in chloride solution and found that the formation of an oxide layer is responsible for the excellent corrosion behavior [9]
Potentiodynamic polarization analysis was done on γ-TiAl alloy in 1 M HCL acidic solution in order to check the effect of increasing temperature on its corrosion
Summary
The need for increasing the performance and efficiency of engines has led to a huge demand for advanced materials in the aerospace and automobile industry. The electrochemical studies of produced γ-TiAl alloy were performed in an aerated 1 M HCl solution at different periods of exposure using potentiodynamic polarization measurement.
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