电厂热力设备防腐蚀技术研究进展葛红花

专题报告,(,,,200090)　:,,:、、、、。:;;:TG174　　　:A　　　:1005-748X(2009)09-0611-09AdvancesinAnti-corrosionTechnologyforElectricPowerEquipmentGEHong-hua,ZHOUGuo-ding(ShanghaiUniversityofElectricPower,ShanghaiEngineeringResearchCenterofEnergy-SavinginHeatExchangeSystems;ShanghaiKeyLaboratoryofCollegesandUniversitiesforCorrosionControlinElectricPowerSystemandAppliedElectrochemistry,Shanghai200090,China)Abstract:Corrosioncontroloftheelectricpowerequipmentcaneffectivelyimprovethesafetyperformanceofelectricpowersystems.Someanti-corrosiontechniquesforthermalpowerequipmentaresummarizedanddiscussed,suchasthehightemperaturecorrosioncontrolofboilersandshutdownprotections,thecorrosioncontroloftheinnercoolingwatersystemingenerators,theanti-corrosionforcondensers,thescaleandcorrosioninhibitionofheatexchangesystemandenergy-savingtechnology,thecorrosioncontroloffluegasdesulfurizationequipment,andsoon.Keywords:electricpowerequipment;corrosioncontrol;anti-corrosion　　,,。“,”,21,。20032007,4、5、6、7。2008,79253,,。,,,,,,:2009-07-15:(08DZ2201400,08DZ2210800,09DZ0500400):,,[e-mail]。,,。,,。1　,。,。,。。。,,,,。,。,、、,,·611·30920099CORROSION&PROTECTIONVol.30　No.9September2009。、、。、、、、[1-2],、。:(1),,,。,420～480℃,10℃,2[3]。、、,,,SO3,。(2),。(CaCO3)(MgCO3·CaCO3),CaOMgO,SO3,SO3。,。(3)。,。,,,,。,,,。(4)。,,,。(5)。,NiCrA1-Mg、NiCrTi、Ni3Al、NiCrBSi、-6[4-7],。Tao[8]NiCrC,,,,。、()。2　,,。,,。,,、、、、、、[9]。,。(ODA)。,ODA。,,90、80[10],ODA。,()、、、[11-13],,220℃、1hODA;ODAK1[14],ODA,;pH9,[15],pH,,N(),H+[16],,pHODA;ODAODA,ODA25mg/L。ODANCH(),,,ODA,,[17]。ODA,ODA[18],ODA。,[19-20]。,·612·:,,1。11、2ODA、Bode,3、4ODA、()。1,ODAZ0.05Z0.053,Z0.051。1.　2.　3.ODA　4.ODA1　Bode1　Z0.05(Ψ·cm2)ODAODA1.55×1031.86×1032.16×1062.03×1061,ODAZ0.052×103Ψ·cm2,ODAZ0.052×106Ψ·cm2,ODAZ0.05ODAZ0.051000,。,200MW,,,202()24h;3,、、43～10,2Bode,ODA,Z0.051.68kΨ·cm215.4kΨ·cm2。3　,“--”、“--”1.　2.2　Bode“--”。“--”;“”,“--”。5,84,,,,,、、。(),。。,,,。,,,、,。[21-24]:(1)防止氧和二氧化碳进入系统　,,。,,,,。。、、、。U。(2)缓蚀剂处理技术　,BTA()MBT(2-)·613·:。MBT、Cu-MBT,。MBT,NaOH,,MBT,。BTA,BTA,pH5.5～6.5,Cu-BTA,Cu(C6H4N3)、Cu(C6H4N3H)+、Cu(C6H4N3H)2+2。,BTA。BTA,2.0μS/cm,3mg/LBTA,2h,BTA。BTA,6μS/cm,BTA。,1～2mg/L。(3)pH调节法　pHNH3NaOHpH,,,。pH,,pH8.5～9.0,。pH,,。,pH。。(4)小混床处理法　,,,,,。,300MW,,。,,。(5)溢流换水法　,,.,2μS/cm,。,,。,,。4　,:,,,;,,,,,,,。,。,,。(1)给水的除氧处理　,。,,。、pH、、、。,,,,。,:,,,,,,。,,。,,。,Na2SO3:2Na2SO3+O2※2Na2SO4　　,(N2H4):N2H4+O2※N2+2H2O　　Na2SO3,SO2H2S,。N2H4,,,。,。(2)给水的加氧处理　(OT)(O2·614·:H2O2)。(AVT),。2070,、、,30,、、[26]。OT,,AVT,FeOOH。,,,,,,,(FAC)[26-28]。,、、OT。,,,(Fe3O4),Fe2O3。Fe2O3,。,,,,,。,。,、pH、、、。,,。,,,。,:2Fe2++H2O+12O2+8Cl-※2[FeCl4]-+2OH-　　,。,pH7,pH。。4,pH6.5～7.08.0～8.5,20～50μg/L,Fe2O3,20μg/L。,Fe2O3Fe2O3[27]。,。,,。、,、。,。,,,[29-30]。,。,,0.15μS/cm,0.10μS/cm。0.10μS/cm,0.075μS/cm[30]。5　,。,,,,。,、、,、,。,,。(1)冷却水的绿色化学法处理　、、。,,。·615·::、、、、、。,,、、[31],,[32-33]。,[34],90%。,。,,,,。。,。,。,[35]。,,,,,。,,。,,,,;,。3,[36-37]。、,,,,;SEM、XRD、IR,,;,,、,。(2)冷却水的物理法处理　、ECO-GEM、、、,。、、。。,,,,,,,、。,,,、。,,、。,,,。,,、、。,,,,,、、。,、、、[38-39]。,,·616·:,,20μm。,,150μm,[40]。,Fe3O4,Fe2O3,[42]。,,,,,。,pH,,pH。,,,。6　,,。,,。,SO2,SO2O3、NO2,SO3,,,“”,。,SO2。(FlueGasDesulfurization“FGD”)。/、。FGD、、SO2、、。、。SO2、、、。SO2。。,,、、、。,,FGDFGD,。,,,,,。FGD“”。,。。,70℃。207080,FGD,,100000h。,,。70℃、、[43]。、,,。,,,10%。,、,,,,。784,,,,,,,。,,C-276、C-926,[44]。7　,、·617·:,。,,。,。,。:[1]　,,,.DG1025[J].,2003,23(11):211-214.[2]　,.[J].,2002,22(2):1700-1704.[3]　,.[J].,2008(3):21-23,37.[4]　MayoralM,AndresJM,BeizunceJ,etal.StudyofsulphidationandchlorinationoxidizedSS310andplas-ma-sprayedNi-Crcoatingsassimulationofhotcorro-sioninfoulingandslaggingincombustion[J].Corro-sionScience,2006,48(6):1319-1336.[5]　.[J].,2002(12):70-72.[6]　SidhuBS,PrakashS.DegradationbehaviorofNi3Alplasma-sprayedboilertubesteelsinanenergygenera-tionsystem[J].JournalofMaterialsEngineeringandPerformance,2005,14(3):356-362.[7]　SidhuTS,PrakashS,AgrawalRD.HotcorrosionstudiesofHVOFNiCrBSiandStellite-6coatingsonaNi-basedsuperalloyinanactualindustrialenvironmentofacoalfiredboiler[J].Surface&CoatingsTechnol-ogy,2006,201:1602-1612.[8]　TaoK,ZhouX,CuiHua,etal.Preparationandprop-ertiesofananostructuredNiCrCalloycoatingforboil-ertubesprotection[J].MaterialsTransactions,2008,49(9):2159-2162.[9]　.[M].:,1998.[10]　FilippovGA,MartynovaOI,KukushkinAN,etal.Preservationoftheequipmentofthermalandnuclearpowerstationsbymeansoffilm-formingamines[J].ThermalEngineering,1999,46(4):307-311.[11]　GeHong-hua,ZhouGuo-ding,LiaoQiang-qiang,etal.Astudyofanti-corrosionbehaviorofoctadecylam-ine-treatedironsamples[J].AppliedSurfaceScience,2000,156:39-46.[12]　,,.[J].,2000,16(9):860-864.[13]　,,.[J].,1999,20(3):118-120,134.[14]　DubrovskiiIY.Distributionofoctadecylamineanditsthermolysisproduct(ammonia)betweenboilingwaterandsteam[J].TransactionofMoscowPowerEngineeringInstitute,1981,530:162-166.[15]　MarugameK.[C]//,1995:10.[16]　.[M].,:,1984,11.[17]　KeithM.Theuseofaminesinsteamcondensatere-turnlines[J].AntiCorrosMethodsMater,1987,34(4):6.[18]　,,.[C]//,,:,1997:8-11.[19]　LiaoQiang-qiang,GeHong-hua,ZhouGuo-ding.Useofoctadecylamineforshutdownprotectionatpowerplants[J].MaterialPerformance,2008,47(1):58-62.[20]　,,,.[J].,2001,22(11):468-470,474.[21]　,,,.[J].,2006,18(4):273-277.[22