ABSTRACT Schiff base was synthesized and the inhibitive effect for mild steel in 1M HCl solution was investigated by weight loss measurement electrochemical tests . From the weight loss measurements and electrochemical tests it was observed that the inhibition efficiency increases with the increase in the Schiff base concentration and reaches maximum at the optimum concentration. This is further confirmed by the decrease in the corrosion rate. It is found that the system follows Langmuir adsorption isotherm. Key Words: Schiff base Acid corrosion Electrochemical impedance spectroscopy Polarization