Jinendra Singh Chauhan1 and D. K. Gupta2
1Sagar Institute of research and Technology Bhopal (M.P.), India-462041.
2Institute of Excellence in Higher Education, Bhopal (M.P.), India-462041.
A B S T R A C T
The use of Betalains Cu corrosion behavior was tested in aerated aqueous solutions of KCl for different pH values. Polarization resistance (Rp) measurements, Polarization curves and AC impedance technique were used to obtain experimental data. Betalains found to exhibit cationic type in acidic media solution of KCl. The impedance spectra and curves at different potentials showed that the corrosion process of metal was characterized by two distinguishable capacitance loops. The charge transfer resistance Rt and polarization resistance, Rp values calculated from the interpretation of Nyquist and Bode plots were in agreement with the results of the other techniques.
Keywords: Betalains, Polarization resistance, Nyquist and Bode plots.