Effectiveness of some Nonionic Surfactants As Corrosion Inhibitors for Carbon Steel in Hydrochloric Acid Solution

Abstract

The corrosion inhibition characteristics of the synthesized (I, II and III) nonionic surfactants on carbon steel corrosion in 1 M acid chloride have been investigated at 30 oC by potensiodynamic polarization. The obtained results show that compound I has the best efficiency at concentration 0.08 mmol/L while compound III is the best inhibitor at higher concentrations. The surface parameters of each synthesized surfactant were calculated from its surface tension including the critical micelle concentration (CMC), effectiveness of surfactant (π), maximum surface excess (Γmax) and the minimum surface area (Amin).