Corrosion behavior of mild steel in H2SO4 solution with 1,4-di [1′-methylene-3′-methyl imidazolium bromide]-benzene as an ionic liquid

The corrosion inhibition effectiveness of 1,4-di [1′-methylene-3′-methyl imidazolium bromide]- benzene as an ionic liquid on mild steel in 1 M H2SO4 was confirmed using electrochemical methods and surface analysis. The data obtained from EIS and polarization curves indicated the inhibition efficiency is in direct ratio to the inhibitor concentration. Through taking advantage of SEM/EDX and AFM, less corrosion damage was connected to the surface adsorption of the ionic liquid molecules. According to the data extracted from the Langmuir adsorption isotherm, a physisorption mechanism was indicated. Moreover, the EIS data showed the time dependence of inhibition, confirmed by EDX.