Preparation of Imidazoline Corrosion Inhibitor by Catalytic Oxidation Based on Computer Aided Technology

Alkyl imidazoline corrosion inhibitor was prepared with Cocinic and diethylenetriamine (DTA) as reactant and xylene as water carrier. The relationship between the preparation process, molecular structure and the corrosion inhibition performance of boiler water system was studied by computer aided technology. The results showed that temperature, reaction time and reactant ratio were the key factors affecting the yield. Carbon steel corrosion inhibition rate of alkyl imidazoline derivatives in boiler water can reach more than 80%. The corrosion inhibitor has a strong inhibitory effect on the dissolution process of the corrosion anode and the depolarization process of the cathode, so it can be considered as a mixed corrosion inhibitor of carbon steel based on the anode. The reason of corrosion inhibition is that the corrosion inhibitor adsorbs on the surface of carbon steel and forms a thin film, effectively blocking the contact between the steel surface and water.