Schiff base N-[(2-chloroquinolin-3-yl) methylidene ]-2-methylaniline (CQM) was synthesized, and its inhibitive effect for mild steel in 1M HCl solution was investigated by weight loss measurement and 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 a maximum at the optimum concentration. This is further confirmed by the decrease in corrosion rate. It is found that the system follows Langmuir adsorption isotherm.

Subject
Acids, Corrosion rate, Metal surfaces, Adsorption, Adsorption isotherms, Nyquist plots, Metals, Inhibition efficiency, Weight loss, Weight loss analysis, Corrosion inhibitors, Steel, Corrosion protection
Keywords:
Schiff base, Acid corrosion, Electrochemical impedance spectroscopy, Polarization
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2011
Association for Materials Protection and Performance (AMPP)
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