Synergistic corrosion inhibition effect of thiazolyl-based ionic liquids between anions and cations for copper in HCl solution

The synergistic corrosion inhibition performance of 3, 3′-Diethylthiadicarbocyanine iodide (DI) and Thioflavin T (TT) for copper in 0.1 M HCl solution was investigated by electrochemical methods , weight loss tests and SEM . Besides, through the thermodynamics and kinetics analysis , the effects of temperature and concentration were explored. The XPS was also applied to study synergistic inhibition mechanism between anions and cations of ionic liquid . The results indicated that the inhibitor molecules interacted with copper forming protective film to inhibit corrosion by physical and chemical adsorption , also the organic cations and halogen ions had synergistic corrosion inhibition. With theoretical calculation and molecular dynamics simulation, the experiment validity was further assessed.