ASTM-D562(KU黏度).3215-1

Designation:D562–01(Reapproved2005)StandardTestMethodforConsistencyofPaintsMeasuringKrebsUnit(KU)ViscosityUsingaStormer-TypeViscometer1ThisstandardisissuedunderthefixeddesignationD562;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1ThistestmethodcoversthemeasurementofKrebsUnit(KU)viscositytoevaluatetheconsistencyofpaintsandrelatedcoatingsusingtheStormer-typeviscometer.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E1SpecificationforASTMLiquid-in-GlassThermometers3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1consistency,n—loadingramstoproducearotationalfrequencyof200r/min(StormerViscometer)3.1.2Krebsunits(KU),n—valuesofascalecommonlyusedtoexpresstheconsistencyofpaintsgenerallyappliedbybrushorroller.3.1.2.1Discussion—Thisscaleisafunctionofthe“loadtoproduce200-r/min”scale.4.SummaryofTestMethod4.1Theloadrequiredtoproducearotationalfrequencyof200r/minforanoffsetpaddlerotorimmersedinapaintisdetermined.5.SignificanceandUse5.1Thistestmethodprovidesvaluesthatareusefulinspecifyingandcontrollingtheconsistencyofpaints,suchasconsumerortradesalesproducts.METHODA6.Apparatus6.1Viscometer,Stormer,withthepaddle-typerotorasillustratedinFig.1andFig.2.ThestroboscopictimerattachmentinFig.1canberemovedandtheinstrumentusedwithoutitbutwithasacrificeofspeedandaccuracy.Thestroboscopictimergivesthe200r/minreadingdirectly.6.2Container,500-mL(1-pt),85mm(33⁄8in.)indiameter.6.3Thermometer—AnASTMStormerViscositythermom-eterhavingarangefrom20to70°CandconformingtotherequirementsforThermometer49C,asprescribedinSpecifi-cationE1.6.4Stopwatch,orsuitabletimermeasuringto0.2s.6.5Weights,asetcoveringtherangefrom5to1000g.7.Materials7.1Twostandardoils,calibratedinabsoluteviscosity(poise),thatarewithintheviscosityrangeofthecoatingstobemeasured.Theseoilsshoulddifferinviscositybyatleast5P.NOTE1—ThenormalrangeoftheStormeriscoveredbyoilshavingviscositiesof4P(70KU),10P(85KU),and14P(95KU).7.1.1Suitablestandardsaresilicone,hydrocarbon,linseed,andcastoroils.Siliconeandhydrocarbonoilscalibratedinpoisesarecommerciallyavailable.Uncalibratedlinseedandcastoroilsmaybecalibratedwithanyapparatusthatprovidesmeasurementsofabsoluteviscosity.1ThistestmethodisunderthejurisdictionofASTMCommitteeD01onPaintandRelatedCoatings,Materials,andApplicationsandisthedirectresponsibilityofSubcommitteeD01.24onPhysicalPropertiesofLiquidPaints&PaintMaterials.CurrenteditionapprovedDec.1,2005.PublishedDecember2005.Originallyapprovedin1947.Lastpreviouseditionapprovedin2001asD562–01.DOI:10.1520/D0562-01R05.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.1Copyright.(C)ASTMInternational,100BarrHarbourDrive,P.O.boxC-700WestConshohocken,Pennsylvania19428-2959,UnitedStatesCopyrightbyASTMInt'l(allrightsreserved);FriJul203:47:27EDT2010Downloaded/printedby3MpursuanttoLicenseAgreement.Nofurtherreproductionsauthorized.7.1.2Assignavalueofloadtoproduce200r/mintoeachoilbyconvertingitsviscosityvalueinpoisestoloadingramsbythefollowingequation:3L5~610O1906.6D!/30where:O=viscosityofoilinpoisesandD=densityofoil.8.Calibration48.1Removetherotorandweightcarrierfromtheviscom-eter.Makesurethestringiswoundevenlyonthedrumanddoesnotoverlapitself.8.2Attacha5-gweightontothestringandthenreleasethebrake.Iftheviscometerstartstorunfromthisdeadstartandcontinuestorunthroughseveralrevolutionsofthestringdrum,itissatisfactoryforuse.Ifitdoesnotstartunaidedwhenthe5-gweightisapplied,theinstrumentshouldbereconditioned.8.3Checkthedimensionsofthepaddle-typerotor.Theyshouldbewithin0.1mm(60.004in.)ofthedimensionsshowninFig.2.8.4Selecttwostandardoilshavingassignedvaluesofloadtoproduce200r/minwithintherangeofthevaluesexpectedforthecoatingstobemeasured(see7.1).8.5Adjustthetemperatureofthestandardoilsto2560.2°C.ThetemperatureoftheStormerapparatusshouldbethesame.Ifthespecifiedtemperaturecannotbeobtained,recordthetemperatureoftheoilatthebeginningandendoftestto0.2°C.8.6Determinetheloadingramstoproduce200r/minwitheachofthetwooils,usingeitherProcedureAdescribedinSection9orProcedureBdescribedinSection10.8.6.1Iftheoiltemperaturewasnotat2560.2°Cduringthetest,correctthemeasuredloadingramsforthedeviationfromthattemperature.NOTE2—Loadcorrectionsfordeviationsofoiltemperaturefromthespecifiedtemperaturecanbemadebymeansofapreviouslyestablishedplotofloadversusoiltemperature(see