Thiourea-Formaldehyde Polymer a New and Effective Corrosion Inhibitor for Mild Steel in Hydrochloric Acid Solution

摘要

Thiourea-Formaldehyde polymer (T-F Polymer) was synthesized by microwave method and itsinhibitive action on the corrosion of mild steel (MS) in 1 M HCl was investigated under differentexperimental conditions using weight loss, electrochemical impedance spectroscopy (EIS) andpotentiodynamic polarization technique. These techniques confirmed the adsorption of polymer onmild steel surface. Results obtained showed that the polymer acts as a good corrosion inhibitor for MSin 1 M HCl. It inhibits corrosion by adsorption mechanism. Tafel polarization data revealed that thepolymer acted as mixed-type inhibitor. The adsorption of the inhibitor on mild steel surface obeyed theLangmuir adsorption isotherm.