Ethylbenzotriazolium bromide ionic liquid: A new water soluble inhibitor for corrosion of mild steel in acid media

Abstract

The inhibiting effect of 1-ethyl-3-ethylbenzotriazolium bromide ionic liquid, [C2Et]Br, on the corrosion behaviour of mild steel in 5 wt. % HCl was investigated by using various techniques such as weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy. All studies showed that the increase in inhibition efficiency and decrease in the corrosion rate by increasing the inhibitor concentration. Polarization measurements indicated that the [C2Et]Br acted essentially as a mixed-type inhibitor. The electrochemical impedance study showed that corrosion inhibition took place by adsorption.