Improvement of corrosion resistance of carbon steel in hydrochloric acid medium by 3,6-bis(3-pyridyl)pyridazine

摘要: Corrosion inhibition of carbon steel in normal hydrochloric acid solution at 30°C by new pirydazine derivative, namely 3,6-bis(3-pyridyl) pyridazine (3-PYP) has been studied a series known techniques such as weight loss, polarisation and electrochemical impedance spectroscopy (EIS). The experimental results have showed that this organic compound revealed good corrosion the efficiency is increased with inhibitor concentration. Potentiodynamic suggested it mixed type inhibitor. Two time constants determined charge-transfer adsorption inhibitor, respectively, can be readily outlined. 3-PYP on surface, 1 M HCl solution, obeyed to Temkin's isotherm very high negative value standard Gibbs free energy δ G ° ads (chemisorption). Quantum chemical calculations X-ray photoelectron (XPS) analysis were carried out establish mechanism medium presence 3,6-bis(3-pyridyl)pyridazine (3-PYP).