咪唑啉和季铵盐类缓蚀剂对P110S钢的缓蚀作用和机理研究
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摘要
采用失重法、极化曲线、电化学阻抗谱(EIS)和扫描电镜(SEM)研究了咪唑啉和季铵盐缓蚀剂在H_2S/CO_2环境中对P110S钢的缓蚀作用和缓蚀机理。结果表明,咪唑啉缓蚀剂和季铵盐缓蚀剂均为阳极型缓蚀剂;在120℃,H_2S分压为0.55 MPa、CO_2分压为0.80 MPa的环境中,两种缓蚀剂均有一定的缓蚀作用,能有效抑制P110S钢的腐蚀;添加浓度为200 mg·L~(-1)时,咪唑啉缓蚀剂的缓蚀效率可达87.23%。
The corrosion inhibition and mechanism of imidazoline and quaternary ammonium salt inhibitors for P110 S steel in H_2S/CO_2 containing environment were investigated by mass loss method, polarization curve, electrochemical impedance spectroscopy(EIS) and scanning electron microscopy(SEM). The results show that the imidazoline inhibitor and quaternary ammonium salt inhibitor are all anode type corrosion inhibitors. The two inhibitors have a certain corrosion inhibition for P110 S steel saturated with 0.55 MPa H_2S and 0.80 MPa CO_2 at 120 ℃. The inhibition efficiency of imidazoline reaches 87.23% when its addition concentration is 200 mg·L~(-1).
The corrosion inhibition and mechanism of imidazoline and quaternary ammonium salt inhibitors for P110 S steel in H_2S/CO_2 containing environment were investigated by mass loss method, polarization curve, electrochemical impedance spectroscopy(EIS) and scanning electron microscopy(SEM). The results show that the imidazoline inhibitor and quaternary ammonium salt inhibitor are all anode type corrosion inhibitors. The two inhibitors have a certain corrosion inhibition for P110 S steel saturated with 0.55 MPa H_2S and 0.80 MPa CO_2 at 120 ℃. The inhibition efficiency of imidazoline reaches 87.23% when its addition concentration is 200 mg·L~(-1).
引文
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[3]孙方红,马壮,宋晓龙,等.油气管道选材及防护技术的研究进展[J].热加工工艺,2013,42(6):34-37.
[4]Zafar M N,Rihan R,Hadhrami L.Evaluation of the Corrosion Resistance of SA-543 and X65 Steels in Emulsions Containing H2S and CO2Using a Novel Emulsion Flow Loop[J].Corrosion Science,2015,94:275-287.
[5]Zhao J,Duan H,Jiang R.Synergistic corrosion inhibition effect of quinoline quaternary ammonium salt and gemini surfactant in H2S and CO2saturated brine solution[J].Corrosion Science,2015,91:108-119.
[6]肖荣鸽,韩世聪,吕涛.气液两相流管道内腐蚀与防护研究[J].热加工工艺,2015,44(12):64-67.
[7]油田采出水用缓蚀剂性能评价方法:SY/T 5273-2014[S].
[8]侯雯雯,陈晓东,陈君,等.含氟高温酸化缓蚀剂的制备及性能研究[J].表面技术,2016,45(8):28-33.
[9]Du L,Zhao H X,Hu H X,et al.Quantum chemical and moleculardynamics studies of imidazoline derivatives as corrosion inhibitorand quantitative structure-activity relationship(QSAR)analysis usingthe support vector machine(SVM)method[J].J.Theor Comput Chem,2014,13(2):145.
[10]麻超.中高温缓蚀剂的合成及性能研究[D].西安:西安石油大学,2015.
[11]Khamis A,Saleh M M,Awad M I.Synergistic inhibitor effect of cetylpyridinium chloride and other halides on the corrosion of mild steel in 0.5 M H2SO4[J].Corros Sci,2013,66:343.
[12]王虎,李琛琛,唐鋆磊,等.喹啉季铵盐中氯和溴对其缓蚀性能的影响[J].腐蚀与防护,2016,37(4):321-326.
[13]曹楚南.腐蚀电化学原理[M].北京:化学工业出版社,2008.
[14]高继峰,刘德绪,龚金海,等.磷酸一氢钠对AZ91镁合金的缓蚀作用[J].腐蚀与防护,2014,35(3):233-238.
[15]董逢寅.高温高压CO2环境咪唑啉缓蚀剂缓蚀性能研究[D].青岛:中国石油大学(华东),2013.
[16]滕飞,井宇阳,胡钢.铸铁文物复合气相缓蚀剂的复配与研究[J].中国腐蚀与防护学报,2015,35(3):265-270.
[17]曹楚南,张鉴清.电化学阻抗谱导论[M].北京:科学出版社,2002.
[18]林翠,肖志阳.碳钢在Na Cl薄液膜下的电化学腐蚀行为[J].腐蚀与防护,2014,35(4):316-320.
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