| 月桂基咪唑啉对Q235钢的缓蚀吸附作用 |
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| 引用本文： | 胡松青,胡建春,高元军,贾晓林,郭文跃.月桂基咪唑啉对Q235钢的缓蚀吸附作用[J].化工学报,2011,62(1):147-155. |
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| 作者姓名： | 胡松青 胡建春 高元军 贾晓林 郭文跃 |
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| 作者单位： | 1.中国石油大学物理科学与技术学院，山东 东营 257061；2中国石油天然气管道局第二工程分公司，江苏 徐州 221008；3新疆吐哈油田建设有限责任公司，新疆 鄯善 838202 |
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| 基金项目： | 中国石油中青年创新基金，中石化普光气田缓蚀剂研究专项项目 |
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| 摘 要： | 采用失重法和电化学方法研究了月桂基咪唑啉(IM-11)、1-氨乙基-2-月桂基咪唑啉(AIM-11)和1-羟乙基-2-月桂基咪唑啉(HIM-11)三种化合物在CO2饱和的3%NaCl溶液中对Q235钢的缓蚀性能,探讨了其在Q235钢表面的吸附行为.结果显示,3种化合物均具有较好的抗CO2腐蚀的缓蚀性能,缓蚀性能的大小顺...
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| 关 键 词： | 缓蚀性能 吸附等温式 密度泛函理论 分子动力学模拟 |
Corrosion inhibition and adsorption of lauryl-imidazolines for Q235 steel |
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| HU Songqing,HU Jianchun,GAO Yuanjun,JIA Xiaolin,GUO Wenyue.Corrosion inhibition and adsorption of lauryl-imidazolines for Q235 steel[J].Journal of Chemical Industry and Engineering(China),2011,62(1):147-155. |
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| Authors: | HU Songqing HU Jianchun GAO Yuanjun JIA Xiaolin GUO Wenyue |
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| Abstract: | The corrosion inhibition and adsorption behavior of lauryl-imidazoline (IM-11), 1-aminoethyl-2-lauryl-imidazoline (AIM-11) and 1-hydroxyethyl-2-lauryl-imidazoline (HIM-11) were investigated as corrosion inhibitors for Q235 steel corrosion in 3% NaCl solution saturated with CO2 by mass loss and electrochemical polarization curves.The results indicated that the three inhibitors all showed excellent corrosion inhibition performance in CO2 corrosion environment.The inhibition efficiency order of the three inhibitors was HIM-11 > AIM-11 > IM-11.The adsorption was spontaneous and exothermic and followed Langmuir isotherm.It belonged to mix-type adsorption mainly dominated by chemisorption.The relationship between molecular structure and inhibition efficiency was investigated by density functional theory (DFT) of quantum chemical calculations, and the quantitative structure-activity relationship (QSAR) model was established.The adsorption behavior of inhibitor molecules on Fe(001) surface was simulated by the molecular dynamics method.The results showed that the ring imidazole and heteroatoms of the polar group on the hydrophilic chain preferentially adsorbed when the inhibitors reacted with metal surface, and the adsorption stability weakened gradually in the order of HIM-11, AIM-11, IM-11.The theoretical calculation accorded well with experimental results. |
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