The Use of Conducting Polyaniline as Corrosion Inhibitor for Mild Steel in Hydrochloric Acid

摘要

Sulfonated chitosan (S-CTS) doped polyaniline (PANI) was synthesized by 渢emplate-freemethodsuccessfully, and it is reported as corrosion inhibitor for the first time. The corrosion inhibitionproperty of PANI was demonstrated for mild steel in acidic environment using weight loss test, Tafelpolarization, electrochemical impedance spectroscopy (EIS), scanning electronic microscope (SEM)and adsorption isotherm. The results revealed S-CTS doped PANI had excellent corrosion inhibitionfor mild steel in 0.5 M hydrochloric acid media and its inhibitive efficiency was more than 92.3% evenwith a low concentration of 40 mg/L.