用可换性镁带阳极对已建地面钢质贮罐底板实施阴极保护的新技术

1,1,1,1,1,2,2,3,3(1.;2.;3.):,:,,,,5000m310000m3,1/3:;;:TG174.41:B:10052748X(2001)1120500203CATHODICPROTECTIONOFBOTTOMOFEXISTINGABOVEGROUNDSTORAGETANKWITHREPLACEABLEMAGNESIUMRIBBONSACRIFICIALANODEGAOLian2yi1,YANDong1,MENGFan2qian1,ANJin1,CHENXiao2neng21,ZHANGZong2wang2,WANGZhong2hua2,ZHANGCheng2dian3,XUNai2xin3(1.No.3ExtractionPlantofNorthChinaOilField;2.HuayuCathodicProtectionTechnologyInc.;3.ShanghaiInstituteofMetallurgy,ChineseAcademyofSciences,Shanghai200050,China)Abstract:Anovelinstallationtechniqueforcathodicprotectionofsoil2sidebottomofexistingabovegroundstoragetankhasbeendeveloped.Magnesiumribbonanodesareinstalledinradialpatternbeneaththetankbottombydirectionaldrillingandthenconnectedelectricallywiththebottom.Theadvantagesofthenewtechniqueinclude:nointerferencewithcontinuousoperationofthetank,reasonablearrangementofanodelocation,uniformdistributionofprotectionpoten2tialontheentirebottom,easyreplacementofthefailedanode,reducedrequirementforelectricisolationofthesystem.Thetechniquewassuccessfullyappliedtotwocrudeoiltankswiththecapacitiesof5000m3and10000m3inNorthChinaOilField.Itcostsonly1/3oftheexpenseforthereplacementofthewholetankbottom.Sosignificantsavingscouldbeobtained.Keywords:Groundstoragetank;Magnesiumribbonanodes;Cathodicprotection1,,,69,1984,2,102000m31500,,,[1],,,,,0052211200111CORROSION&PROTECTIONVol.22No.11November2001,,,,:[2],,,,,,,,,,,,,[3],2,GMC2L21,19mm9.5mm,3.4mm330Ah/m,0.33kg/m,,,,11(Mg)(Re)5000m310000m3,6,30,:5000m39m,10000m313m,,,,,,,,2.5m,5,,,,,,,,,,,,,(Cu2CuSO4),1,,,,,,,,,3(5000m310000m3),,,,1,,-0185V(Cu2CuSO4)300mV,,,,1A,66A,10000m330m,707m2,8.5mA/m3105:1m31#2#3#/(A/)No.15000()99209201-0.52V-0.49V-0.51V099209212-1.10V-1.10V-1.00V0.800212229-1.238V-1.240V-1.011V-No.210000()00212216-0.60V-0.62V-0.59V000212218-1.18V-1.20V-1.16V-00212229-1.060V-1.070V-1.075V-No.35000()99212227-0.56V-0.52V-0.52V000201201-1.24V-1.20V-1.20V1.200212229-1.177V-1.289V-1.04V-No.410000()00201201-0.58V-0.58V-0.56V000201202-1.26V-1.26V-1.26V1.200212229-1.171V-1.249V-1.224V-2(5000m3,:)(40)3129112017(60)41801836415451215,14172,1/3,:[1],,,.[J],1992,13(5):265.[2],,,.[J],1992(12):2:149.[3][P]1:98232550191(499),,,,,,,,,,5(1),(2)(3),,,(4),,:[1],.[J].,2000(3):4350.[2].[M]1:,1960.[3],.[M]1:,1990.[4].[M]1:,1997.205: