Ionic liquid as an effective green inhibitor for acid corrosion of aluminum composite: experimental and theoretical considerations

Abstract Results of anticorrosive performance ionic liquid 1-methyl-1-propyl-piperidinium bromide (MPPB) on corrosion 6061Al-10vol% SiC composite (Al-MMC) in 0.05 M HCl solution. Electrochemical techniques were adopted to study and inhibition rates. Experiments conducted the temperature range 308–323 K by varying concentrations MPPB. Conditions standardized accomplish maximum efficiency. Kinetic parameters evaluated. fitted into various adsorption isotherm models they best Langmuir isotherm. Using data from isotherms, thermodynamic calculated. The surface morphology was examined energy-dispersive X-ray spectroscopy (EDAX), atomic force microscope (AFM), scanning electron (SEM). FTIR–spectra diffraction (XRD) studies performed reaffirm Adsorption inhibitor mechanistic aspects supported supplemented quantum chemical calculations using density functional theory (DFT). investigation revealed that percentage efficiency (% IE) improved with increase concentration MPPB, while it decreased a rise temperature. Maximum 60% observed 400 ppm MPPB at 308 K. acted as mixed inhibitor, obeyed model, mode physisorption. Quantum validated results study. Graphical abstract