三星重工对pspc涂装的研究

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1、EffectsofIMOPSPCContentsWhat’sproblemwithPSPC?12EffectofPSPCWhat’sproblem?ImpracticalRuleforShipbuilder.Remarkablequalityimprovementisnotexpected.AuthorityandResponsibilityisnotclear.Whyimpracticalrule!Eachshipyardhasdifferentpracticebecauseofdifferenceoffacilityandprocess

2、forthecoating.However,PSPCrequireunifiedpractice.Shipbuilder’sexperienceandpracticehavenotbeenreflectedinthePSPC.Eventhough,PSPCeffecttotheShipyardfacility,processandpractice.InspectionforInspectionisrequired.Excessiveinspectionswillnotprovideenhancedquality.Everythingaree

3、volving!BrushRollerAirlessSprayAirSprayElectrostaticSprayTwin-feedSpraySoftRollerSoftBrushBrush-Roller?IACS/IndustryGuidelineallowtousebrushorroller.However,shipowner’sintentionwasthebrushduringJWGmeeting.Everythingareevolving!ROLLERBRUSHSPRAYx4Microscopex12.5MicroscopeMag

4、nifiedPhotoApplicationPorositiescanbefoundwhen12.5timesmagnifiedbymicroscope.Theporositieswillbecoveredbysprayingofmaincoat.Practicealso!AutomaticColdRollingEdgeGrindingDiskGrindingBiteMilling3passGrindingAbout2mmRToreducestripecoatHowever,PSPCrequiresthat2stripecoatstobea

5、ppliedtotheedgesregardlessofshapeofedges.Practicealso!Shipyardexperiencewasdisregarded,eventhough,shipyardprovideclearevidence.Onthecontrary,experienceoftheownerwasadoptedwithoutanyevaluation.EdgeGrindingHistoryofWBTPaintBituminousTarFreeEpoxyEpoxy1970s1980s1990s2000sTarEp

6、oxyModifiedEpoxyTarEpoxyTarFreeEpoxyModifiedEpoxyEpoxy70~75%65~70%60~80%GoodGoodExcellentPoorPoorGoodGoodGoodExcellentPoorPoorExcellentSolidVolumeRatioSeaWaterResistanceHeat/Chem.ResistanceEdgeRetentionAbrasiveResistanceShipowner’sexperiencearebasedonTarEpoxyratherthanEpox

7、y.However,Shipyard’spracticeforepoxycoatinghavebeendevelopedforabout10years.IssuesofSaltlimit?TotalsolublesaltlimitandNaCllimitNaCl50mg/m2Totalsolublesalt83mg/m2≈WatersolublesaltslimitequivalenttoNaClafterblasting/Grinding≤50mg/m2ofsodiumchloride.PSPCRequirement-Watersolub

8、lesaltslimitisequivalentto50mg/m2ofNaClor-Watersolublesaltslimitis50mg/m2DE49/WP.3Reports