喹啉季铵盐在气田地层水中的缓蚀性能及协同增效作用研究

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1、唾咻季鞍盐在气田地层水中的缓蚀性能及协同增效作用研究摘要：本文采用静态失重法、屯化学极化曲线、阻抗谱(EIS)、扫描电子显微镜(SEM)及电子能谱分析研究气井地层水腐蚀体系中，隆卩林季鞍盐与乌洛托品对P110碳钢的缓蚀协同效应和缓蚀性能评价。实验结果表明：乌洛托品、喳n林季钱盐、卩奎咻季钱盐与乌洛托品复合(A)缓蚀剂在模拟地层水屮均能够降低腐蚀速率，当复合缓蚀剂的比例合适时，P110钢的腐蚀速率均低于缓蚀剂单独使用时的腐蚀速率。当A的配比为6:4时，腐蚀速率最小，II比单独使用座n林季钱盐或乌洛托品

2、吋的缓蚀效果更好，表明乌洛托品和座卩林季钱盐具有协同缓蚀作用。电化学测试表明：当乌洛托品或座咻季鞍盐单独使用时，较空白实验的极化电阻值增大；当加入A时，会使测试电极极化电阻值增人的更明显，腐蚀电流密度大大降低，腐蚀速率小。通过扫描电子显微镜观察加入缓蚀剂与未加入缓蚀剂时P110钢片表面的腐蚀情况，验证了以上结论。关键词:CO2腐蚀;缓蚀协同;座咻季镀盐；乌洛托品QuinolineQuaternaryAmmoniumSaltinTheCorrosionPerformanceofGasFieldWate

3、randSynergicEffectAbstract:Inthispaper,thestaticweight-lossmethod,electrochemicalpolarizationcurves,electrochemicalimpedancespectroscopy(EIS),scanningelectronmicroscopy(SEM)andelectronenergyspectrumanalysisstudyofgaswellcorrosionofformationwatersystem,

4、quinolinequaternaryammoniumsaltandUrotropineonPHOsteelcorrosionsynergisticeffectandcorrosioninhibitionperformanceevaluation.Theexperimentalresultsshowthatthecorrosionrateofurotropine,quinolinequaternaryammoniumsalt,quinolinequaternaryammoniumsaltandUro

5、tropinecomplex(A)corrosioninhibitorinsimulatedwellwatercanreducethecorrosionrate,whencompoundedcorrosioninhibitorinappropriateproportion,PHOsteelcorrosionratewerelowerthancorrosioninhibitorusedalone.WhentheratioofAto6:4,aminimumcorrosionrateshowedthatu

6、rotropineandquinolinequaternaryammoniumsalthasasynergisticinhibitioneffect.Electrochemicaltestsshowthatwhenurotropinorquinolinequaternaryammoniumsaltwhenusedalone,comparedwiththeblanktestofpolarizationresistancevalueincreases;whenaddingA,willmakethetes

7、telectrodepolarizationresistancevalueincreasesmoreobviously,greatlyreducedthecorrosioncurrentdensity,corrosionrateissmall.ThecorrosionofPl10steelsheetwhenthecorrosioninhibitorandthecorrosioninhibitorwasobservedbyscanningelectronmicroscope,andtheconclus

8、ionwasverified..Keywords:CO2Corrosion;CorrosionInhibitionandSynergistic;QuinolineQuaternaryAmmoniumSalt;Urotropine第一章绪论11.1腐蚀防护的意义11.2腐蚀的概述21.2.1腐蚀的基本概念21.2.2腐蚀的机理21.2.3腐蚀的种类21.2国内外缓蚀剂发展现状41.2.1国外缓蚀剂发展与现状41.2.2国内缓蚀剂发展与现状61.2.3缓蚀剂的发展趋势71