The corrosion behavior of copper in the presence of 2-amino-4-methylphenylamine (AMPA) has been investigated in 2.0 M HNO3 solution using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and weight loss techniques. Polarization studies showed that this compound act as mixed type inhibitor. Impedance spectroscopy measurement showed that the polarization resistance increased and that the capacitance decreased with the increase in the inhibitive concentration. The adsorption of this compound on the copper surface from the acid solution has been found to obey Langmuir adsorption isotherm. The thermodynamic activation parameters of copper corrosion in 2.0 M HNO3 were determined and discussed. The results obtained from EIS, Tafel and weight loss measurements were in good agreement.
