Synthesis and corrosion inhibition of advanced aliphatamidyl alkyl imidazoline

carbon steel;  hydrogen sulfide;  Imidazoline;  Corrosion inhibitors

Using organic fatty acids and diethylenetriamine as raw materials, an advanced aliphatamidamidoalkyl imidazoline compound was synthesized, and its corrosion inhibition effect on carbon steel in HCl-H2S brine system was studied by static weight loss method and potentiodynamic scanning polarization curve method. The results show that for carbon steel in HCl-H2S brine medium, the compound is a corrosion inhibitor with excellent performance, and its corrosion inhibitor efficiency increases with the increase of concentration, and is not greatly affected by temperature changes, which is a hybrid corrosion inhibitor mainly based on anodic control. The corrosion inhibitor is superior to foreign products of the same type in performance.