石油与天然气化工2024，Vol.53Issue(2)：78-86,9.DOI:10.3969/j.issn.1007-3426.2024.02.012
富含双键咪唑啉在饱和CO2盐水中缓蚀行为研究
Corrosion inhibition behavior of rich in double bonds imidazolines in saturated CO2 brine
摘要
Abstract
Objective The linoleic acid imidazoline containing two double bounds was synthesized,and compared with the traditional oleic acid imidazoline containing a single double bond,the effect of its strcture on corrosion inhibition performance was studied.Methods Q235 steel was immersed in a 3 wt％NaCl solution saturated with CO2 at 60 ℃.Corrosion inhibition efficiency was evaluated through weight loss and electrochemical tests,and the morphological changes of the steel surface after corrosion were observed using surface analysis methods.The performance of synthesized corrosion inhibitor was also studied using theoretical calculations.Results The results show that after adding 200 mg/L of the linoleic acid imidazoline containing two double bonds,the corrosion inhibition efficiency can reach 90％,which is superior to the commonly used oleic acid imidazoline.Structurally,the linoleic acid imidazoline only differs from the oleic acid imidazoline by the presence of one additional double bond.This extra double bond increases the adsorption sites of the imidazoline corrosion inhibitor,which makes it better adsorb to the metal surface.Conclusions The linoleic acid imidazoline with two double bonds exhibits excellent corrosion inhibition performance on carbon steel and outperforms the oleic acid imidazoline under the same experimental conditions.The adsorption process conforms to the Langmuir adsorption isotherm,primarily adsorbing on the Fe surface through N-Fe bonding.关键词
缓蚀剂/亚油酸咪唑啉/电化学评价/量子化学计算/分子动力学模拟Key words
corrosion inhibitor/linoleic acid imidazoline/electrochemical evaluation/quantum chemical calculations/molecular dynamics simulation引用本文复制引用
邹斌,梁伟,盖平原,陈晓春,程仕键,付朝阳..富含双键咪唑啉在饱和CO2盐水中缓蚀行为研究[J].石油与天然气化工,2024,53(2):78-86,9.基金项目
国家自然科学基金企业创新发展联合基金"难采稠油多元热复合高效开发机理与关键技术基础研究"(U20B6003) （U20B6003）
中石化集团公司重点科技攻关项目"锅炉烟气辅助蒸汽提高热采效果技术研究"(P20050-4) （P20050-4）
