典型不锈钢晶间腐蚀敏化温度的研究_秦丽雁

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:(50499335):,,1965,,1,221,3(11300072;21030001;31110016):(EPR)-202304409430.,,650,950..::TG17413:A:100524537(2006)01200012051.,,,[1]..,1012%,.[2,3],[4,5].,650700;,927.,.2202304409430,1.410mm10mm2mm80mm20mm2mm,,650950.2.LEO438VP.,,1cm2.600#,.80mm20mm2mmGB433015-90.Cihal[6](EPR),PART273.,.015mol/LH2SO4+0101mol/LKSCN,251,.40min,,1mV/s,013V.,(Ia)(Ir),Ir/IaRr().[7],Rr0106,;0106Rr0116,,;Rr0116,.[8].GB433015-90-.Table1Chemicalcompositionsofdifferentstainlesssteels(mass%)steelCSiMnPSCrNiTiNFe2020109601927180103101031171214180Bal.3040103501511118010350102917158810101150123Bal.40901024014701270101701003111460108Bal.430011101070105010290102717112Bal.26120062JournalofChineseSocietyforCorrosionandProtectionVol126No11Feb12006©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(GB433415-90).14EPR,.3,202304650,0116Rr0106,(1);430950Rr0116,(2a),4090116Rr0106,(2b).950,Rr0106,(3);409430650,Rr0106,(4).Table3Resultsofintergranularcorrosiontestsamplecodesteelsensitivetreatmentreactivationrate(Rr)sulphuricacid-sulphateofcopper1202650120min,aircooling010870micro-tinycrack2304650120min,aircooling010720micro-tinycrack01202950120min,aircooling010056nocrack02304950120min,aircooling010015nocrack3409650120min,aircooling010067nocrack4430650120min,aircooling010084nocrack03409950120min,aircooling010780micro-tinycrack04430950120min,aircooling012800tinycrackFig.1SurfacemorphologyofspecimenafterEPRtest(650sensitization)(a)1#,(b)2#Fig.2SurfacemorphologyofspecimenafterEPRtest(950sensitization)(a)04#,(b)03#226©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(950sensitization)(a)01#,(b)02#Fig.4SurfacemorphologyofspecimenafterEPRtest(650sensitization)(a)3#,(b)4#Fig.5Microstructureofausteniticstainlesssteelaftersensitiveheattreatmentat650(a)1#,(b)2#3,650950,950.650950,950650.:650,950.31258650950.,.C(),0115%().C,C.,C31:©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a)01#,(b)02#Fig.7Microstructureofferriticstainlesssteelaftersensitiveheattreatmentat650(a)3#,(b)4#Fig.8Microstructureofferriticstainlesssteelaftersensitiveheattreatmentat950(a)03#,(b)04#,.TiNb,Cr23C6,400950.,.Cr23C6,.,0115%(),950.650,202304(5),950,202304(6).EPR:650,Rr950Rr,650,950,650.650,Cr[9].Cr,Cr,,.426©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(7),950409430(8),,430.EPR:950,Rr650Rr,950,650,950.EPR,950409Rr0106,(4a),409,Ti,Cr,.4,.650,950.,,.:[1]TabodaA,PrankL.Intergranular,corrosioninnuclearsystem,in2tergranularcorrosioninstainlessalloys[M].ASTMSTP656.SteigerwaldRF,ed.Philadelphia,PA:ASTM,1978,85[2]ClarkWL,RomeroVM,DankoJC.Detectionofsensitizationinstainlesssteelsusingelectrochemicaltechnique[A].Corrosion/77[C].Houston,TX:NACE,1977:180[3]ClarkWL,CowanRL,WalkerWL.Comparativemethodsformeasuringdegreeofsensitizationinstainlesssteels,inintergranularcorrosionofstainlessalloys[M].ASTM,STP656.SteigerwaldRF,ed.Philadelphia,PA:ASTM,1978,99[4]JISG0575-1999CorrosionTestMethodforStainlessSteelSul2phuric-AcidSulphateofCopper[S].(JISG0575-1999-[S].)[5]GB4335-2000CorrosionTestMethodforStainlessSteelSulphuric-AcidSulphateofCopper[S].(GB4335-2000-[S].)[6]CihalC,DesestretA,FromentM,WagnerGH.Testsforevaluationofsensibilityofstainlesssteelstointergranularcorrosion[A].Proc.5thEuropeanCorros.Cong[C].Paris,France:EuropeanFederationonCorrosion,1973:249[7]QinLY,DongZD.Applicationofelectrochemicalmethodtoevalu2ateintergranularcorrosionsusceptibilityofstainlesssteels[J].TaigangScienceandTechnology,1991,3:80-86(,.[J].,1991,3:80-86)[8]NathalieLopez,MarianoCid,MoniquePuiggali,InakiAzkarate,Al2bertoPelayo.Applicationofdoublelooppotentialdynamicreactiva2tiontesttoausteniticandduplex[J].Mater.Sci.Eng.A,1997,229(1-2):123-128[9]XiaoJM.MetallographyofStainlessSteel[M].Beijing:MetallurgyIndustryPress,1983:246248(.[M].:,1983:246-248)SENSITIVETEMPERATURESFORINTERGRANULARCORROSIONOFTYPICALSTAINLESSSTEELSQINLiyan1,2,ZHANGShoulu2,SONGShizhe1,3(11SchoolofMaterialsScienceandEngineering,TianjinUniversity,Tianjin300072;21TechnologyCenterofTaiyuanIronandSteelGroupCo.Ltd.,Taiyuan030001;31StateKeyLaboratoryforCorrosionandProtection,Shenyang110016)Abstract:Electrochemicalpotentiodynamicreactivation(EPR)test,sulphuricacid-sulphateofcopper(GB433