A condensation product (CP) was successfully synthesized from reaction of dimethyl amino benzaldehyde and aniline giving yields of 80%. The compound was characterized by Fourier Transform Infrared (FTIR) Spectroscopy. The corrosion inhibiting property of the CP on mild steel in HCl solution were investigated by the weight loss measurements, electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR). The concentrations of CP were varied from 1 x 10-3 M to 5 x 10-3 M. The inhibition efficiencies obtained from all the methods employed were in good agreement where the percentage of inhibition efficiencies increased with concentration of CP. Results showed that CP was the better inhibitor with inhibition efficiency of 90% at 5 x 10-3 M additive concentration. This is likely due to the effect of its large molecular size, higher number of electroactive heteroatoms and bigger p-electron cloud of the conjugated double bond system.
condensation product, Corrosion inhibitor, Hydrochloric acid, Mild steel
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