Study on 1-allyl-3-butylimidazalium Bromine as Corrosion Inhibitor for X65 Steel in 0.5 M HSO Solution

In this paper, the anti-corrosive effect of an ionic liquid named 1-allyl-3-butylimidazalium bromine for X65 steel in 0.5 M H 2 SO 4 has been systematically studied via various electrochemical techniques, containing weight loss experiments, electrochemical tests, scanning electron microscope (SEM), theoretical calculations. The results obtained from weight loss experiments and electrochemical tests displayed that [ABlm]Br served as a mixed-type inhibitor primarily controlling cathode corrosion process and the anti-corrosive efficiency (up to 90.38% at 10 mM) improved with the increase of the concentration. Besides, it was found that the adsorption of the organic molecules on X65 steel substrate followed the Langmuir adsorption isotherm and surface topography of X65 steel was characterized using Scanning electron microscopy (SEM). In addition, theoretical calculations suggested that investigated inhibitor was flat-lying adsorbed on the X65 steel surface.