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51315-5832-Evaluating the Role of SO? and O? on the Corrosion of X65 in Water-Containing Supercritical CO? Environments

Picture for Evaluating the Role of SO? and O? on the Corrosion of X65 in Water-Containing Supercritical CO? Envi
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Product Number: 51315-5832-SG
ISBN: 5832 2015 CP
Author: Yong Hua
Publication Date: 2015
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AsystematicstudyispresentedtohighlighttherolethatsmallconcentrationsofSO2andO2playonthedegradationprocessesandcorrosionproductcompositionandmorphologyinsystemsrepresentativeofCO2transport.Bothgeneralandlocalisedcorrosionbehaviourofcarbonsteelinwater-saturatedsupercriticalCO2environmentsareconsideredat35°and80bar.VariouslevelsofSO2(0250100ppminmole)andO2(020ppm)areconsideredinaseriesof48hourtests.Masslossmeasurementsandsurfaceprofilometryareimplementedtoquantifygeneralandlocalisedcorrosionrates.TheresultsindicatethatbothSO2andO2inhibit/preventtheformationofFeCO3whilstalsoincreasingdegradationrateandpromotingtheformationofhydratedFeSO3.Furthermoreacomparisonbetweengravimetricandprofilometryresultsindicatedthatpittingratescanbeoveranorderofmagnitudegreaterthanthe'uniform'corrosionratedetermined.Thecorrosionproductmorphologyandcompositiononthecarbonsteelsurfaceisidentifiedthroughacombinationofscanningelectronmicroscopy(SEM)X-raydiffraction(XRD)energydispersiveX-rayspectroscopy(EDX)andtransmissionelectronmicroscopy(TEM)coupledwithselectedareaelectrondiffraction(SAED)measurementsandEDXmapping.
AsystematicstudyispresentedtohighlighttherolethatsmallconcentrationsofSO2andO2playonthedegradationprocessesandcorrosionproductcompositionandmorphologyinsystemsrepresentativeofCO2transport.Bothgeneralandlocalisedcorrosionbehaviourofcarbonsteelinwater-saturatedsupercriticalCO2environmentsareconsideredat35°and80bar.VariouslevelsofSO2(0250100ppminmole)andO2(020ppm)areconsideredinaseriesof48hourtests.Masslossmeasurementsandsurfaceprofilometryareimplementedtoquantifygeneralandlocalisedcorrosionrates.TheresultsindicatethatbothSO2andO2inhibit/preventtheformationofFeCO3whilstalsoincreasingdegradationrateandpromotingtheformationofhydratedFeSO3.Furthermoreacomparisonbetweengravimetricandprofilometryresultsindicatedthatpittingratescanbeoveranorderofmagnitudegreaterthanthe'uniform'corrosionratedetermined.Thecorrosionproductmorphologyandcompositiononthecarbonsteelsurfaceisidentifiedthroughacombinationofscanningelectronmicroscopy(SEM)X-raydiffraction(XRD)energydispersiveX-rayspectroscopy(EDX)andtransmissionelectronmicroscopy(TEM)coupledwithselectedareaelectrondiffraction(SAED)measurementsandEDXmapping.
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