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Adsorption and anticorrosion behaviour of an imine compound on low carbon steel in HCl solution at different potentials

Abstract The inhibition capability of an imine compound named (2-methoxyphenyl)-N-(2-(phenylthio)phenyl)methanimine (MPM) on low carbon steel corrosion in HCl solution was investigated at various concentrations and temperatures by using electrochemical and microscopic techniques. The electrochemical results revealed that the inhibition efficiency increases with an increase in the MPM concentration, and MPM has provided 98.8% protection for 120 h. Electrochemical studies at different potentials showed that electrostatic effects have an important role on the adsorption of MPM on the metal surface. scanning electron microscopy and energy-dispersive X-ray spectroscopy results also confirmed that MPM has reduced the corrosive effect of HCl.