Solubility and Corrosion Inhibition Performance of Imidazoline Solid Inhibitor

An imidazoline solid corrosion inhibitor was prepared by orthogonal test. The solubility and inhibition effect of the solid corrosion inhibitor were evaluated by static glass tube method and weight loss method, respectively. The corrosion inhibition performance of the solid corrosion inhibitor on N80 steel in 5% HCl solution at different temperatures was studied by electrochemical method, and the adsorption behavior of the inhibitor and corrosion morphology of N80 steel were analyzed. The experimental results show that the solid corrosion inhibitor was a slow-release inhibitor, whose dissolution rate decreased gradually with the increase of time, and reached to 0.403 g/h after 72 hours. In 5% HCl solution, the solid corrosion inhibitor could effectively inhibit the corrosion of N80 steel. The inhibition efficiency increased with the decrease of temperature and the increase of inhibitor dosage. The inhibitor was an anodic type inhibitor. The adsorption of the inhibitor on the surface of N80 steel conformed to Langmuir adsorption isotherm, which belonged to monolayer adsorption, and the adsorption mode was mixed adsorption.