【英文标准名称】:Criticalitysafetyinprocessingandhandlingfissilematerials;criticalitydataforlowenricheduraniumdioxidlatticesinwater
【原文标准名称】:处理和使用核燃料时的临界安全性.在水中的低浓缩二氧化铀栅棒的临界数据
【标准号】:DIN25403T.7-1990
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
【页数】:
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【英文标准名称】:StandardTestMethodforPull-OffStrengthofCoatingsUsingPortableAdhesionTesters
【原文标准名称】:用便携式粘附力测定仪测定涂层脱落强度的标准试验方法
【标准号】:ASTMD4541-2009e1
【标准状态】:现行
【国别】:
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D01.46
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:粘附;涂层;场;金属基;油漆;便携的;脱落强度;拉力试验;粘附-涂料/相关涂层/材料;涂层(油漆/相关应用);破坏顶点-油漆/相关涂层;固定校准粘附力测定仪;载荷试验;便携式粘附力测定仪;防护涂层;张力试验;自校准粘附力测定仪;应力;表面分析-油漆/相关涂层/材料
【英文主题词】:adhesion;coatings;field;metalsubstrates;paint;portable;pull-offstrength;tensiletest;Adhesion--paints/relatedcoatings/materials;Coatings(paint/relatedapplications);Failureendpoint--paints/relatedcoatings;Fixedalignmentadhesiontester;
【摘要】:Thepull-offstrengthofacoatingisanimportantperformancepropertythathasbeenusedinspecifications.Thistestmethodservesasameansforuniformlypreparingandtestingcoatedsurfaces,andevaluatingandreportingtheresults.Thistestmethodisapplicabletoanyportableapparatusmeetingthebasicrequirementsfordeterminingthepull-offstrengthofacoating.Variationsinresultsobtainedusingdifferentdevicesordifferentsubstrateswiththesamecoatingarepossible(seeSection11).Therefore,itisrecommendedthatthetypeofapparatusandthesubstratebemutuallyagreeduponbetweentheinterestedparties.Thepurchaserorspecifiershalldesignateaspecifictestmethod,thatis,B,C,D,E,orFwhencallingoutthisstandard.1.1Thistestmethodcoversaprocedureforevaluatingthepull-offstrength(commonlyreferredtoasadhesion)ofacoatingsystemfrommetalsubstrates.Pull-offstrengthofcoatingsfromconcreteisdescribedinTestMethodD7234.Thetestdetermineseitherthegreatestperpendicularforce(intension)thatasurfaceareacanbearbeforeaplugofmaterialisdetached,orwhetherthesurfaceremainsintactataprescribedforce(pass/fail).Failurewilloccuralongtheweakestplanewithinthesystemcomprisedofthetestfixture,adhesive,coatingsystem,andsubstrate,andwillbeexposedbythefracturesurface.Thistestmethodmaximizestensilestressascomparedtotheshearstressappliedbyothermethods,suchasscratchorknifeadhesion,andresultsmaynotbecomparable.Note18212;Theprocedureinthisstandardwasdevelopedformetalsubstrates,butmaybeappropriateforotherrigidsubstratessuchasplasticandwood.Factorssuchasloadingrateandflexibilityofthesubstratemustbeaddressedbytheuser/specifier.1.2Pull-offstrengthmeasurementsdependuponbothmaterialandinstrumentalparameters.Resultsobtainedbyeachtestmethodmaygivedifferentresults.Resultsshouldonlybeassessedforeachtestmethodandnotbecomparedwithotherinstruments.Therearefiveinstrumenttypes,identifiedasTestMethodsB-F.Itisimperativetoidentifythetestmethodusedwhenreportingresults.Note28212;MethodA,whichappearedinpreviousversionsofthisstandard,hasbeeneliminatedasitsmainuseisfortestingonconcretesubstrates(seeTestMethodD7234).1.3Thistestmethodusesaclassofapparatusknownasportablepull-offadhesiontesters.Theyarecapableofapplyingaconcentricloadandcounterloadtoasinglesurfacesothatcoatingscanbetestedeventhoughonlyonesideisaccessible.Measurementsarelimitedbythestrengthofadhesionbondsbetweentheloadingfixtureandthespecimensurfaceorthecohesivestrengthsoftheadhesive,coatinglayers,andsubstrate.1.4Thistestcanbedestructiveandspotrepairsmaybenecessary.1.5ThevaluesstatedinMPa(inch-pound)unitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G51
【国际标准分类号】:87_040
【页数】:16P.;A4
【正文语种】: