搜索
TOTALCORROSIONCONTROLVOL.23No.8Aug.2009200CO2H2SCO2H2SCO2H2S1991125H2S27CO2763000CO2/H2SH2SCO2CO2H2SCO2H2SCO2CO2H2SCO2SM80SSCO2/H2S841000SEMXEDSX(XRD)CO2SM80SSCO2/H2SPCO2H2SFeSPCO2CO2FeSFeS0.9,SM80SSCO2/H2SCO2TG172.5A1008-7818(2009)08-0020-04CO2PartialPressureInflunceonCorrosionBehaviorofSM80SSSuperAnti-sulfideTubingSteelinCarbonDioxideandHydrogenSulfideConcomitantEnvironmentZHOUWei-jun,GUORui,ZHANGYongTarimOilfeildCompanySaleDepartment,Kuerle841000,China)Abstract:CorrosionbehaviorofSM80SSsuperanti-sulfidetubingsteelisstudiedintheenvironmentofcarbondioxideandhydrogensulfideconcomitantenviroment.TheresultsshowthatH2SisthemajorroleofthereactioninlowPCO2,corrosionproductfilmsFeScomeintobeingfirstlyduringtheprogressoftheexperiment,corrosionproductfilmsarefineandcompact,averagecorrosionrateislow.ButCO2isthemajorroleofthereactionduringPCO2greatinghigherandhigiher,corrosionproductfilmsFeSbegintograduallychangeintoFeS0.9,corrosionproductfilmsgreatbulkyandloose,averagecorrosionrategreathigher.CorrosionproductfilmscanblocklocalcorrosionoccureingonthesurfaceofSM80SSsuperanti-sulfidetubingsteel.Corrosionmodeisevencorrosion.Keywords:SM80SSsuperanti-sulfidetubingsteel;CO2/H2S;PCO2;corrosionproductfilm;corrosionmechanism1980-orrosionResearchC2382009821CO2H2S11.1SSCSM80SS11.2CORTEST5L35MPa350/LeicaS-360SEMNSS-300XEDSD/MAX-2400XXRDFR-300MK0.1mg1.330154mm200#400#600#SiCN2142330MPa1.19g/cm3120g50g2335FR-300MK0.1mgV=W365000/(St)(1)Vmm/aWg7.8g/cm3Smm2tNACERP0775322.1CO2CO2PCO24PH2S0.16%N290Cl-50g/LCa2+Mg2+C(Ca2++Mg2+)20g/L42.1.14PCO2SM80SSCRSM80SSCRmm/a0.0250.025~0.1250.125~0.2540.2543NACERP0775CMnSiPSCrMoNiVTi0.250.410.220.0060.0061.010.320.0300.0060.0241SM80SSPCO2(%)PH2S(%)T()CCl-(g/L)(Ca2++Mg2+)(g/L)5350.16905020(15Ca2++5Mg2+)2orrosionResearchCTOTALCORROSIONCONTROLVOL.23No.8Aug.200922PCO2PCO2CRPCO2%35%CRPCO2%5%22.1.2SEMPCO21(a)(b)SM80SS35%SEMPCO2%PCO2%SEMPCO2%51m2(a)PCO2%PCO2%99mPCO2%2(b)PCO2%SM80SSCl-[1]2.1.3XEDSCO2COFeSCaPCO2OFeS3(a)(b)PCO2EDSPCO2%5%COFeSCOFeS4CO2SM80SSPCO2(%)5101535CR(mm/a)1.663.874.136.67(a)PCO2%=5%(b)PCO2%=35%1SEM200X(a)PCO2%=5%(b)PCO2%=35%2SEM200XorrosionResearchC2382009823(a)PCO2%=5%(b)PCO2%=35%3EDSPCO2%35%OFeSPCO2%5%CPCO2COFeSSH2SXXRDPCO2PCO25%FeS0.9FeSFeCO34(a)PCO2PCO2PCO235%FeS0.9FeCO34(b)SM80SSH2SPCO2PCO2(x+1)Fe+(x+0.9)H2SxFeS+FeS0.9+(x+0.9)H2(2)PCO2Fe+0.9H2SFeS0.9+0.9H2(3)PCO2FeCO3PCO2%SM80SSCO2H2SPCO2PCO2H2SFeS[2-4]PCO2CO2FeSFeS0.931PCO2SM80SS2PCO2H2SSM80SSFeSFeS0.9FeCO3FeS3PCO2CO2FeSFeS0.9FeS0.9FeCO34Cl-PCO2SM80SS[1].[M].2000.105.[2]FierroG,IngoGM,ManclaFi.XPS-investigationonthecorrosionbehaviorof13CrmartensiticstainlesssteelinCO2-H2S-Cl-environment[J].Corrosion,1989(10):814.[3]MasamuraK,HashizumeS,SakaiJ.Polar-izationbehaviorofhigh-AaloyOCTGinCO2environmentasaffectedbychloridesandsulfides[J].Corrosion,1987(6):359.[4].CO2/H2S[D].,2002.26.(a)PCO2%=5%(b)PCO2%=35%4PCO2XRDorrosionResearchC