The Effect of New Pyridazinium-Based Ionic Liquid Derivative as Corrosion Inhibitor for Carbon Steel in 1M HCl Solution

Eco-friendly ionic liquid 1-(2-ethoxy-2-oxoethyl) pyridazinium chloride (EOPC) newly synthesised was tested as corrosion inhibitor of carbon steel (CS) in normal hydrochloric acid solution using, potentiodynamic polarisation electrochemical impedance spectroscopy (EIS) measurements and weight loss method. Gravimetric essays indicate that EOPC inhibits the corrosion of steel. The protection efficiency increases with increasing inhibitors concentration. That EOPC is a good inhibitor and inhibition efficiency reaches 92.80 % at the 10 -3 M of EOPC. Potentiodynamic polarization curves showed that the EOPC affects both cathodic and anodic current and may be classified as mixed type inhibitors in1M HCl. The adsorption of this compound on C-steel surface obeys Langmuir's adsorption isotherm.