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冷涂锌复合涂层体系在钢桥梁上的施工应用.docx

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冷涂锌复合涂层体系在钢桥梁上的施工应用 Abstract Withtherapiddevelopmentofinfrastructureconstructioninrecentyears,theapplicationofsteelbridgeshasbecomeincreasinglywidespread.However,asanimportantinfrastructureproject,steelbridgesareoftenexposedtovariousenvironmentalfactorssuchasacidrain,ultravioletradiation,andairpollution,whichwillacceleratetheircorrosionandgreatlyreducetheirservicelife.Inordertosolvethisproblem,anewtypeofcoatingsystem--coldzinccompositecoatingsystemhasemerged.Thecoatingsystemiseasytooperate,lowcost,andhasexcellentperformanceintermsofanti-corrosionandweatherresistance.Thisarticlemainlydiscussestheapplicationofcoldzinccompositecoatingsystemintheconstructionofsteelbridges,hopingtoprovidesomereferencesandsuggestionsforconstructionengineers. Introduction Steelbridgesarewidelyusedinmoderninfrastructureconstructionduetotheirhighstrength,gooddurability,andquickconstruction.However,duetotheimpactofexternalenvironmentalfactors,suchaswind,sun,andrain,steelbridgesarepronetocorrosionandrust,whichreducestheirservicelifeandaffectsthesafetyoftransportation.Therefore,thesurfaceprotectionofsteelbridgesisparticularlyimportant. Thetraditionalanti-corrosiontreatmentofsteelbridgesmainlyadoptshot-dipgalvanizing,whichischaracterizedbygoodperformanceandlongservicelife.However,thehighcostandlimitedconstructionconditionsmakeitdifficulttoapplyinsomesituations.Inviewofthissituation,thecoldzinccompositecoatingsystemhasemerged,whichhasexcellentanti-corrosionperformance,easyconstruction,andlowcost,andhasbeenwidelyusedintheconstructionofsteelbridges. ColdZincCompositeCoatingSystem Thecoldzinccompositecoatingsystemconsistsofmultiplecoatings,includingazinc-richprimer,intermediatecoating,andtopcoat.Thezinc-richprimerismadeoforganicandinorganiczincpowder,epoxyresin,curingagent,andauxiliaryagents.Theintermediatecoatingismadeofmodifiedacrylicresin,curingagent,andauxiliaryagents.Thetopcoatismadeofafluorine-containingpolymerresin,pigment,andauxiliaryagents. Thecoldzinccompositecoatingsystemhasthefollowingad