文献类型：期刊文献

英文题名：Effect of corrosion products on the inhibitory performance of imidazolium ionic liquid toward carbon steel in CO2-saturated NaCl brine

作者：Guo, Yinyin[1,2];Xue, Juanqin[1,3];Zhang, Juantao[2];Chen, Qibin[4];Fan, Lei[2];Tang, Changbin[3];Ren, Kang[1];Fu, Anqing[2];Bi, Qiang[3]

机构：[1]Xian Univ Architecture & Technol, Sch Met Engn, Xian 710055, Peoples R China;[2]CNPC Tubular Goods Res Inst, State Key Lab Performance & Struct Safety Petr Tub, Xian 710077, Shaanxi, Peoples R China;[3]Xian Univ Architecture & Technol, Sch Chem & Chem Engn, Xian 710055, Peoples R China;[4]East China Univ Sci & Technol, Sch Chem & Mol Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：651

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20223012405809);WOS:【SCI-EXPANDED(收录号:WOS:000835499200004)】；

基金：The authors would like to acknowledge the support of the National Natural Science Foundation of China (Nos. 22078254, 51874227) , the Shaanxi Province Natural Science Basic Research Project (No. 2019JLM43) , the Industrialization Cultivation Project of Shaanxi Pro- vincial Department of Education (20JC025) , the National Key Research and Development Program of China (2019YFF0217500) .

语种：英文

外文关键词：Carbon steel; CO2 corrosion; Electrochemical measurements; Quantum chemical calculations; Molecular dynamics simulations

摘要：Carbon steel corrosion represents an intractable problem during oil and gas exploitation. An imidazolium-based ionic liquid, 1-dodecyl-3-methyl imidazolium hydrogen sulfate (abbreviated as DMIMHS), was used as a corrosion inhibitor for carbon steel in the CO2-saturated NaCl brine at 313 K in this study. The inhibitive effects and mechanisms of the pre-corroded product on the anti-corrosion behavior of DMIMHS were investigated by electrochemical measurements, surface characterizations, quantum calculation and molecular dynamics simu-lations. The results showed that DMIMHS had remarkable inhibition efficacy on freshly abraded steel, with a 94.46% inhibition efficiency in the presence of 30 mg/L DMIMHS, and corrosion products can slightly decelerate the corrosion behavior. More importantly, the addition of DMIMHS favored the remarkably enhanced inhibitive properties for carbon steel after pre-corroded, namely the corrosion resistance increased with the extension of corrosion time. According to the experimental results and theoretical calculations, the inhibitive mechanisms of DMIMHS toward carbon steel in the CO2-saturated NaCl brine were proposed.