A study of corrosion inhibition of steel AISI-SAE 1020 in CO2-brine using surfactant Tween 80

[摘要] Surfactant inhibitors also called active surface agents are molecules composed of a polar hydrophilic group and a non-polar hydrophobic group, with characteristics of adsorption on metal surfaces, high efficiency of inhibiting, low price, low toxicity and easy production. In this work, the corrosion inhibition was study by CO2steel AISI-SAE 1020 with the addition of 0.01M Tween 80 surfactant to a brine solution (3% NaCl). Electrochemical Impedance Spectroscopy and potentiodynamic polarization testing investigated the phenomenon. The results revealed that the surfactant studied acts as an excellent corrosion inhibitor and inhibition efficiency (E%) increases with increasing fluid velocity. The morphology of the steel surface after exposure to the solution of 3% NaCl with and without surfactant indicates the inhibition phenomenon is due to the adsorption of the surfactant molecules, which insulate the surface of the corrosive medium and reduces the attack surficial.

[发布机构] Universidad Pedagógica y Tecnológica de Colombia (UPTC), Tunja, Colombia^1

[效力级别] 化学

[关键词] Adsorption on metals;Corrosion inhibition;Corrosive medium;Fluid velocities;Hydrophilic groups;Hydrophobic groups;Inhibition efficiency;Surfactant molecules