油酸咪唑啉缓蚀剂HS11对20钢在减黏顶水介质中缓蚀性能评价

Corrosion Inhibition Effect of Oleic Acid and Diethyletriamine HS11 on 20 Steel in Aqueous Medium of Visbreaking Column Top

针对加工高酸高硫原油对常减压蒸馏塔顶冷凝冷却系统和流出线管线(材质为20钢)腐蚀严重,以油酸与二乙烯三胺合成了油酸咪唑啉缓蚀剂HS11,并与咪唑啉缓蚀剂JC-CR1138、咪唑啉高温缓蚀剂GW01进行复配,采用挂片失重法评价其对20钢在减黏顶水介质中的缓蚀性能。结果表明,HS11缓蚀剂能达到理想的缓蚀效果,最佳用量为200μg/g,缓蚀率达74.31%;与咪唑啉高温缓蚀剂GW01复配,具有良好的协同效应,缓蚀率达89.84%。

In view of the severe corrosion of the condensing and cooling system and the outflow pipeline on the top of the distillation column, that are made from 20 steel, in atmospheric and vacuum distillation unit, an oleic acid and diethyletriamine corrosion inhibitor designated as HS11 was synthesized with oleic acid and diethylenetriamine and was then blended with imidazoline corrosion inhibitor JCCRl138 and imidazoline high temperature corrosion inhibitor GW01. The corrosion inhibition effect of this inhibitor on 20 steel in the aqueous medium of visbreaking column top was evaluated with coupon weight loss method. According to the resuits, desirable corrosion inhibition effect can be achieved by making use of corrosion inhibitor HS11, the optimum usage of this inhibitor is 200 ug/g, and the inhibition efficiency of this inhibitor can be as high as 74.31%. The inhibition efficiency can be further increased to 89.84% by making use of the synergistic effect between this inhibitor and imidazoline high temperature corrosion inhibitor after blending these two inhibitors.