Synthesis of amide-based surfactant inhibitor for carbon steel corrosion protection electrochemical analysis

Abstract

In this paper, a variety of amide-based cationic surfactants were synthesized through the chemical route. Then, the properties of the as-prepared surfactants, such as the surface tension, the minimum surface area, the maximum surface excess and the critical micelle concentration, were investigated. The 1H NMR and FTIR spectra was recorded to determine their structures. The corrosion inhibition capacity of the as-synthesized amide-based surfactants was evaluated on the carbon steel, where the polarization, weight loss and electrochemical impedance experiments were performed. It was demonstrated that the surfactants were immobilized well on the surface of the carbon steel, which could be elaborated with Langmuir adsorption isotherm. The influences of various parameters further were investigated and discussed.