Effective green corrosion inhibition of aluminium using analgin in acidic medium: an experimental and theoretical study

摘要

The anti-corrosion potency of analgin on the corrosion of aluminum in 0.5 M HCl solution was examined at various concentrations and temperatures (298-328 K) through methods viz., weight loss studies, potentiodynamic polarization techniques, electrochemical impedance spectroscopy (EIS), computational studies and AFM studies. PDP data reveal that all analgin acts as a significant mixed-type effect at high inhibitor concentrations of 4000 ppm. EIS data reveal better adsorption of analgin on aluminum surface at increased inhibitor concentrations reaching a maximum efficiency of 92% at 4000 ppm. Analgin was inclined toward the Langmuir adsorption-isotherm. Furthermore, molecular dynamics simulations have been performed to illustrate the most conceivable adsorption configuration between the inhibitor and metal surface.