碳鋼在CO-,2-飽和的烷醇胺溶液中的陽極溶解行為研究.pdf

1、華中科技大學碩士學位論文碳鋼在CO飽和的烷醇胺溶液中的陽極溶解行為研究姓名：馮緒文申請學位級別：碩士專業(yè)：應用化學指導教師：郭興蓬2002.5.12華中科技大學碩士學位論文Abstract西ecarbondioxide(C02)absorptionprocessusingalkanolaminesolutionshasbeenextensivelyusedfortheremovalC02fromnaturalandrefineryoff

2、gases，whichisthemostpracticalandeffectivetechnologyofseparatingC02andpreventingglobalwarmingat21centuryThecorrosivityofalkanolaminesolutionsafterabsorbingC02isoneofthemainrestrictivefactorsofitsapplication，SOmuchattentio

3、nhavebeenfocusedonthecorrosionbehaviorThispaperdiscussedthecorrelationbetweenanodicdissolutionbehaviorofcarbonsteelandC02一absorptionmechanismofalkanolaminesolutionsusingelectrochemicalmethodsandsurfaceanalysistechniquesW

4、eightlosstestshowedthat，thecorrosivityofC02saturatedalkanolaminesolutionsforcarbonsteeldecreasedintheorder：MEAAMPDEAMDEAandincreasedwithincreasingtemperature，whichaccordedwiththeresultsfrompotentiodynamicpolarizationande

5、lectrochemicalimpedancespectroscopyMEAsolutionabsorbedC02byformingMEA—carbamate，DEAsolutionabsorbedC02bybothofformingDEA—carbamteandHC03‘，butinAMPandMDEAsolutionsonlyHC03’wasformedTherewasnocorrosionproductonthesurfaceof

6、carbonsteelinMEAsolutionandthesurfaceofcarbonsteelbecamemuchrougherOntheotherhand，athickandmuchlacunarycorrosionproductscalewasformedonthesurfaceofcarbonsteelinAMPsolution，andafewcrystalgrainascorrosionproductwereformedo

7、nthesurfaceofcarbonsteelinDEAandMDEAsolutionsAccordingtotheresultsinthiswork，itwasobviousthatcarbamatewasoneofthemaincorrosiveFactors，whichwasastrongchelatereagentandformedasolublecomplexwithFe(II)，therebytheanodicdissol

8、utionofcarbonsteelwasacceleratedgreatlyTherewasnocarbamateformedinMDEAsolution，andtheanodicdissolutionprocessofcarbonsteeldifferedgreatlyfromthatinMEAandDEAsolutionswhichwasthemainreasonforthelowcorrosivityofMDEA。Alkanol