Inhibition Effect of Some Cationic Surfactants on the Corrosion of Carbon Steel in Sulphuric Acid Solutions: Surface and Structural Properties

• Published in: International journal of electrochemical science 2014-05, Vol.9 (5), p.2237-2253
• Main Authors: Hazazi, O.A., Abdallah, M., Gad, E.A.M.
• Format: Article
• Language: English
• Subjects: Carbon steel; corrosion inhibitors; structural properties; surface activity
• ISSN: 1452-3981; 1452-3981
• DOI: 10.1016/S1452-3981(23)07923-3

The inhibition effect of three synthesized molecules of cationic surfactants namely, 2-(hexyloxy) -N, N, N-tris (2-hydroxyethyl) -2-oxoethanaminium chloride (compound I), 2-(dodecyloxy) -N, N, N-tris (2-hydroxyethyl) -2-oxoethanaminium chloride (compound II), and 2-(octadecyloxy) -N, N, N-tris (2- hydroxyethyl) -2-oxoethanaminium chloride (compound III)on the corrosion of carbon steel(Type L- 52) in 0.5MH2SO4 solution was investigated.The inhibition action of these surfactants was studied by weight loss , and potentiodynamic anodic polarization techniques. The percentage inhibition efficiency increases with increasing the inhibitor concentration and decreasing temperature. The adsorption of inhibitors on the steel surface obeys Langmuir adsorption isotherm. It was found that, the cationic surfactants compounds provides a good protection to steel against pitting corrosion in chloride containing solutions. Some surface properties has been determined and explained. The structural study proves that the degree of surfactants packing is more than 0.33 which indicated that the surfactants has rod or cylindrical shape.