管道防腐 涂层

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1、anti-corrosionprotectionofburiedpipelines---Anticorrosioncoatingswww.themegallery.comContentsthefunctionofcoating•1mechanismsandcharacteristicsofvariouscoatings2Implementationofthecoatingonsite3www.themegallery.comwww.themegallery.comSelectionofthemostecono

2、micallyeffectivetechniqueforminimizingtheeffectsofcorrosionisacriticaldesigndecision.Thiscoursewillreviewfusionbonded-epoxy(FBE)coatingsolutionsforcorrosionmitigationofpipelinesystemswww.themegallery.com1.thefunctionofcoatingUsingthesesystemsisvitaltoprotec

3、tsteel.Coatingshelppreventcorrosionbyproviding:(1)Sacrificialorgalvanicprotection.(2)Passivationofthesteel(inhibitivepigments).(3)Abarrieragainsttheenvironment.www.themegallery.comVarioustypesofcoatingCoatingsofpipelines:Hydrocarbonbitumen(hardcoaltar,aspha

4、lt)Polyethylene(2or3layers)PolypropyleneEpoxy（环氧树脂）Polyurethanefoam(聚氨酯泡沫)Coatingsoffittings:PolyurethaneorModifiedPolyurethane(projected)MouldedresinsPolyurethane（成型树脂聚氨酯）www.themegallery.comFieldjointscoatings(weldedjoints)（现场对接/连接接头）Polyethylenetapes（聚乙烯

5、胶带）ShrinksleevesPolypropyleneMechanicalprotectionPolyethylenecoatings:3layers(PE3L)www.themegallery.comFunctionsoftheanticorrosioncoatingwww.themegallery.comCoatingsforpipelineswww.themegallery.comFieldjointcoatings(weldedjoints)www.themegallery.comComponen

6、tsofinsulatedpipelinewww.themegallery.comComplementarymechanicalprotectionTheseprotectionsareusedcomplementarytotheanti-corrosivecoating:-inrockground,-whenconcretesaddlearenecessaryThemechanicalprotectionshavetosatisfytoparticulartests:-indentationandimpac

7、t,-absorptivityinaqueousenvironment,-resistancetotheattackbymicro-organismswww.themegallery.comComplementarymechanicalprotectionwww.themegallery.comFusionBondedEpoxy(FBE)FieldFBEcoatingshavebeeninuseforundergroundandunderseapipelineprotectionfornearlyfortyy

8、ears.www.themegallery.comAsignificantadvantageofFBEcoatingsystemsisthatthesamematerialscanbeusedonthegirthweldasontherestofthepipewww.themegallery.comThree-layerpolyolefin（聚烯烃）coatingsystemsutilizeFBEa