咪唑啉季铵盐缓蚀剂的复配机理
|
摘要
通过电化学测试确定咪唑啉季铵盐(IM)和辛基酚聚氧乙烯醚(OP)两种缓蚀剂的最佳复配比,利用X射线光电子能谱(XPS)分析高温高压CO_2腐蚀条件下缓蚀剂在L245钢表面的吸附特性,结合分子动力学计算研究了复配缓蚀剂的缓蚀机理。结果表明:复配后IM缓蚀剂分子在金属表面吸附量增加,同时OP分子的吸附提高了IM缓蚀剂分子在金属表面的吸附覆盖程度,形成致密的保护膜,阻碍溶液中腐蚀性介质对金属表面的侵蚀,有效保护基体减缓腐蚀,从而使得IM和OP复配后的缓蚀率明显升高;IM与OP复配后缓蚀剂分子在Fe(001)表面的吸附强度增大,说明缓蚀剂分子的缓蚀性能本质上是由缓蚀剂分子与金属表面的电子转移行为所决定的。
Electrochemical test was used to research the optimum compound proportion of imidazoline quaternary ammonium salt(IM)and octylphenol ethoxylate(OP).X-ray photoelectron spectroscopy(XPS)was used to analyze the adsorption characteristics of the corrosion inhibitor on the surface of L245 steel under the corrosion conditions of high temperature and high pressure with CO_2.The inhibition mechanism of the compound inhibitors were studied by molecular dynamics simulation.The results show that the IM molecules adsorbing on the metal surface increased after being compounded.The adsorption of OP molecules enhanced the adsorption of IM molecules on the metal surface,and a compact protective film was formed to hinder the corrosive media in solution from corroding metal surface and protect the substrate from corrosion effectively.So the inhibition efficiency of IM compounded with OP obviously increased.The adsorption intensity of inhibitor molecules on Fe(001)surface increased after the addition of IM compounded with OP,which indicates that the corrosion inhibition of inhibitor molecules is determined by the electron transfer behavior of inhibitor molecules on the metal surface.
Electrochemical test was used to research the optimum compound proportion of imidazoline quaternary ammonium salt(IM)and octylphenol ethoxylate(OP).X-ray photoelectron spectroscopy(XPS)was used to analyze the adsorption characteristics of the corrosion inhibitor on the surface of L245 steel under the corrosion conditions of high temperature and high pressure with CO_2.The inhibition mechanism of the compound inhibitors were studied by molecular dynamics simulation.The results show that the IM molecules adsorbing on the metal surface increased after being compounded.The adsorption of OP molecules enhanced the adsorption of IM molecules on the metal surface,and a compact protective film was formed to hinder the corrosive media in solution from corroding metal surface and protect the substrate from corrosion effectively.So the inhibition efficiency of IM compounded with OP obviously increased.The adsorption intensity of inhibitor molecules on Fe(001)surface increased after the addition of IM compounded with OP,which indicates that the corrosion inhibition of inhibitor molecules is determined by the electron transfer behavior of inhibitor molecules on the metal surface.
引文
[1]吴荫顺,郑家燊.电化学保护和缓蚀剂应用技术[M].北京:化学工业出版社,2006:472.
[2]柳松,钟燕,蒋荣英,等.苯并三氮唾和碟酸纳对锌的协同缓蚀[J].华南理工大学学报,2011,39(1):36-40.
[3]张晨,赵景茂.CO2体系中咪唑啉季铵盐与十二烷基磺酸钠之间的缓蚀协同效应[J].物理化学学报,2014,30(4):677-685.
[4]赵起锋,徐慧,尚跃再,等.咪唑啉类缓蚀剂缓蚀协同效应的研究现状及展望[J].全面腐蚀控制,2016,30(11):81-85.
[5]谢发之,宣寒.多点位吸附型咪唑啉季铵盐缓蚀剂的合成及其缓蚀性能[J].应用化学,2011,28(1):94-100.
[6]马淑清,何晓英,刘健.咪唑啉缓蚀剂的合成及复配研究[J].化学工程师,2015(10):58-60.
[7]戴倩倩.咪唑啉缓蚀剂的合成及复配研究[D].成都:西南石油大学,2012:4-8.
[8]赵建国.辛基酚聚氧乙烯醚磷酸酯在钢表面的吸附与缓蚀作用[J].材料保护,2008,41(5):23-25.
[9]王霞,杜大委,韩丽丹,等.1-氨乙基-2-烷基咪唑啉季铵盐的合成及其性能评价[J].化工中间体,2014(4):32-38.
[10]FARAG A A,HEGAZY M A.Synergistic inhibition effect of potassium iodide and novel schiff bases on X65steel corrosion in 0.5 M H2SO4[J].Corrosion Science,2013,74:168-177.
[11]谢思维,刘铮,刘进,等.MaterialStudio(MS)软件在腐蚀与防护中的应用研究现状[J].计算机与应用化学,2015,32(2):183-186.
[12]OGUZIEE E,LI Y,WANG F H.Effect of 2-amino-3-mercaptopropanoic acid(cysteine)on the corrosion behaviour of low carbon steel in sulphuric acid[J].Electrochimica acta,2007,53(2):909-914.
[13]于湘,周祥照,程丽华,等.咪唑啉季铵盐复配缓蚀剂的缓蚀性能研究[J].广东石油化工学院学报,2016,26(4):18-21.
[14]李泽斌,徐艳.咪唑啉季铵盐缓蚀剂的合成及复配性能研究[J].精细石油化工进展,2012,13(7):42-45.
[15]刘燕,闫红亮.油酸咪唑啉季铵盐的复配缓蚀性能研究[J].化学与生物工程,2015,32(2):60-63.
[16]吴效楠.油酸咪唑啉季铵盐缓蚀剂的复配及在饱和CO2油田水中的缓蚀作用[J].承德石油高等专科学校学报,2016,18(4):30-33.
[17]杜威.抑制CO2腐蚀用咪唑啉类缓蚀剂及机理研究进展[J].腐蚀科学与防护技术,2016,28(6):584-586.
[18]魏斌,周飞,戴倩倩,等.咪唑啉季铵盐缓蚀剂的合成与复配研究[J].应用化工,2012,41(5):840-843.
[19]王新刚,王晶,张波,等.油酸基咪唑啉类缓蚀剂的复配及其缓蚀性能研究[J].材料保护,2008,41(1):20-23.
[20]WILLARD A P,REED S K,MADDEN P A,et al.Water at an electrochemical interface-a simulation study[J].Faraday Discussions,2009,141:423-441.
[2]柳松,钟燕,蒋荣英,等.苯并三氮唾和碟酸纳对锌的协同缓蚀[J].华南理工大学学报,2011,39(1):36-40.
[3]张晨,赵景茂.CO2体系中咪唑啉季铵盐与十二烷基磺酸钠之间的缓蚀协同效应[J].物理化学学报,2014,30(4):677-685.
[4]赵起锋,徐慧,尚跃再,等.咪唑啉类缓蚀剂缓蚀协同效应的研究现状及展望[J].全面腐蚀控制,2016,30(11):81-85.
[5]谢发之,宣寒.多点位吸附型咪唑啉季铵盐缓蚀剂的合成及其缓蚀性能[J].应用化学,2011,28(1):94-100.
[6]马淑清,何晓英,刘健.咪唑啉缓蚀剂的合成及复配研究[J].化学工程师,2015(10):58-60.
[7]戴倩倩.咪唑啉缓蚀剂的合成及复配研究[D].成都:西南石油大学,2012:4-8.
[8]赵建国.辛基酚聚氧乙烯醚磷酸酯在钢表面的吸附与缓蚀作用[J].材料保护,2008,41(5):23-25.
[9]王霞,杜大委,韩丽丹,等.1-氨乙基-2-烷基咪唑啉季铵盐的合成及其性能评价[J].化工中间体,2014(4):32-38.
[10]FARAG A A,HEGAZY M A.Synergistic inhibition effect of potassium iodide and novel schiff bases on X65steel corrosion in 0.5 M H2SO4[J].Corrosion Science,2013,74:168-177.
[11]谢思维,刘铮,刘进,等.MaterialStudio(MS)软件在腐蚀与防护中的应用研究现状[J].计算机与应用化学,2015,32(2):183-186.
[12]OGUZIEE E,LI Y,WANG F H.Effect of 2-amino-3-mercaptopropanoic acid(cysteine)on the corrosion behaviour of low carbon steel in sulphuric acid[J].Electrochimica acta,2007,53(2):909-914.
[13]于湘,周祥照,程丽华,等.咪唑啉季铵盐复配缓蚀剂的缓蚀性能研究[J].广东石油化工学院学报,2016,26(4):18-21.
[14]李泽斌,徐艳.咪唑啉季铵盐缓蚀剂的合成及复配性能研究[J].精细石油化工进展,2012,13(7):42-45.
[15]刘燕,闫红亮.油酸咪唑啉季铵盐的复配缓蚀性能研究[J].化学与生物工程,2015,32(2):60-63.
[16]吴效楠.油酸咪唑啉季铵盐缓蚀剂的复配及在饱和CO2油田水中的缓蚀作用[J].承德石油高等专科学校学报,2016,18(4):30-33.
[17]杜威.抑制CO2腐蚀用咪唑啉类缓蚀剂及机理研究进展[J].腐蚀科学与防护技术,2016,28(6):584-586.
[18]魏斌,周飞,戴倩倩,等.咪唑啉季铵盐缓蚀剂的合成与复配研究[J].应用化工,2012,41(5):840-843.
[19]王新刚,王晶,张波,等.油酸基咪唑啉类缓蚀剂的复配及其缓蚀性能研究[J].材料保护,2008,41(1):20-23.
[20]WILLARD A P,REED S K,MADDEN P A,et al.Water at an electrochemical interface-a simulation study[J].Faraday Discussions,2009,141:423-441.