Inhibitory Effect of Newly Synthesized Organic Compound in Corrosion of Aluminum: Electrochemical Investigation

摘要

New synthesized 1-(4-nitrophenyl)-5-amino-1H -tetrazole s inhibitory effect on the corrosion of aluminium (Al) in sulfuric acid was investigated by means of potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). According to electrochemical results, excellent inhibiting properties for SS corrosion in sulfuric acid has been obtained. The adsorption of 1-(4-nitrophenyl)-5-amino-1H -tetrazole onto the Al surface followed the Langmuir adsorption model with the free energy of adsorption ΔG~(0)_(ads) of -11.25 kJ mol~(-1). Quantum chemical calculations were employed to give further insight into the mechanism of inhibition action of 1-(4-nitrophenyl)-5-amino-1H -tetrazole.