Synergistic inhibition effect of rare earth cerium(IV) ion and anionic surfactant on the corrosion of cold rolled steel in H2SO4 solution

• DOI: 10.1016/j.corsci.2008.06.026
• Publication Date: 2008-07-04T09:02:16Z
• Authors: Xianghong Li; Shuduan Deng; Hui Fu; Guannan Mu
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract The synergistic inhibition effect of rare earth cerium(IV) ion and anionic surfactant of sodium oleate (C 17 H 33 –COONa, SO) on the corrosion of cold rolled steel (CRS) in H 2 SO 4 solution was first investigated by weight loss and potentiodynamic polarization methods. The results revealed that SO had a moderate inhibitive effect, and the adsorption of SO obeyed the Freundlich adsorption isotherm. For the cerium(IV) ion, it had a negligible effect. However, incorporation of Ce 4+ with SO significantly improved the inhibition performance, and produced strong synergistic inhibition effect. Depending on the results, the synergism mechanism was proposed.