Synthesis and Corrosion Inhibition Behavior of Novel Amide-Based Quarternary Di-Cationic Surfactants on Carbon Steel in HCl Solutions

The synthesis of di-cationic surfactants were occurred by the reaction of three straight-chain amide derivatives with (2-bromoethyl)trimethylammonium bromide. After characterization of these di-cationic surfactants using FT-IR and NMR, the corrosion inhibition tests were performed at room temperature (25°C) in 1.0, 2.0 and 4.0 M of HCl solutions for different immersion times. Over 92% of corrosion inhibition efficiencies were obtained from the weight loss measurements. As evidence for the preventing of the oxidation on carbon steel, very small amount of corrosion rates were measured from the weight loss values. To establish the inhibition efficiency results in 1.0, 2.0 and 4.0 M of HCl solutions, SEM analysis of the metal coupons used were performed.