【英文标准名称】:StandardPracticeforCleaningofMaterialsandComponentsbyUltrasonicTechniques
【原文标准名称】:用超声技术清洗材料和元部件的标准实施规程
【标准号】:ASTMG131-1996(2002)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:G04.02
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:清洁处理;超声波清洗;元部件;材料
【英文主题词】:cleaning;components;materials
【摘要】:Thispracticeissuitablefortheremovalofcontaminantsfoundonmaterials,parts,andcomponentsusedinsystemsrequiringahighlevelofcleanliness,suchasoxygen.Partsshallhavebeenprecleanedtoremovevisiblecontaminantspriortousingthisprocedure.Softgoodssuchassealsandvalveseatsmaybecleanedwithoutprecleaning.ThisproceduremayalsobeusedasthecleanlinessverificationtechniqueforcouponsusedduringcleaningeffectivenesstestsasinTestMethodG122.Thecleaningefficiencyhasbeenshowntovarywiththefrequencyandpowerdensityoftheultrasonicunit.Lowfrequenciesinthe20to25kilohertzrangehavebeenfoundtodamagesoftmetalssuchasaluminumandsilver.Therefore,thespecificationsoftheunitandthefrequenciesavailablemustbeconsideredinordertooptimizethecleaningconditionswithoutdamagingtheparts.1.1Thispracticecoversaprocedureforthecleaningofmaterialsandcomponentsusedinsystemsrequiringahighlevelofcleanliness,suchasoxygen,byultrasonictechniques.1.2Thispracticemaybeusedforcleaningsmallparts,components,softgoods,etc.1.3ThevaluesstatedinSIunitsarestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninNote1.
【中国标准分类号】:J04
【国际标准分类号】:03_080_10
【页数】:5P.;A4
【正文语种】:


【英文标准名称】:Plastics-Instrumentaldeterminationofradiantexposureinweatheringtests-Generalguidanceandbasictestmethod
【原文标准名称】:塑料气候试验中辐射曝露的仪器测定一般指南和基本试验方法
【标准号】:ISO9370-1997
【标准状态】:作废
【国别】:国际
【发布日期】:1997-10
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:一般条件;太阳辐射;定义;效应;辐照;试验;环境试验;塑料;辐射;测定;风化
【英文主题词】:Definitions;Determination;Effects;Environmentaltesting;Generalconditions;Irradiation;Plastics;Radiation;Solarradiation;Tests;Weathering
【摘要】:1ThisInternationalStandardspecifiesmethodsfortheinstrumentalmeasurementofirradianceonaplanarsurface.Thisincludesbothnaturalandsimulatednaturalexposuretesting.2Instrumentaltechniquesincludethecontinuousmeasurementoftotalsolarandspectralsolarirradiance(withemphasisontheultravioletwavelengthregion),andtheaccumulation(orintegration)ofinstantaneousdatatoprovideatotalradiantexposure(dosage).3Exposureinapparatususingartificiallightsourcessometimesrequiresmeasurementofirradianceandradiantexposureatspecifiedwavelengthsinordertomonitorand,ifrequired,controltheirradianceonaplanarsurfaceand/ortodefinequantitativelytheexposurestagesofanexposedspecimen.Typically,measurementsofradiationinthe290nmto400nmband,ornarrow-bandmeasurementswithcentrewavelengthsat,forexample,340nmor420nm,arerequired.However,incontrasttonaturalexposureconditions,radiationofwavelengthsshorterthan300nmispresentinmostlightsourcesusedinlaboratoryacceleratedtests,andisknowntocauserapiddegradationinmanypolymers.Inaddition,radiationoflongerwavelengthscanbeveryimportantinproductdegradationsuchascolourfade.Therefore,itmaybeveryusefultomonitorshort-wavelengthradiationoflessthan300nmandlong-wavelengthradiationatwavelengthsgreaterthan400nm.4ThisInternationalStandarddeesnotspecifyproceduresusingbluewoolstandards,chemicalactinometry,monochromatorsorpolymericandotherfilmdosimetry.NOTE1Thisshouldnotbeconstruedtoimplythatsuchtechniquesareundesirable.Effortsareunderwayinseveralcountriestodeveloppolymericdosimetersforthispurpose.NOTE2Monochromatorsareusuallyusedinspectroradiometricsystemswherehigh-resolutionprecisionscanningofapassbandisrequired.5ThetotalsolarandsolarultravioletradiationmeasuringinstrumentsdescribedinthisInternationalStandardcanbeusedinthefollowingexposuretests:a)NaturalexposuretestsMeasurementoftotalsolarandsolarultravioletradiationusingtheinstrumentsandproceduresspecifiedinthisInternationalStandardwillimprovethecomparabilityofexposuretestsconductedatdifferenttimesinasinglelocation.Itmayalsoimprovethecomparabilityofresultsobtainedindifferentlocationswithsimilarclimates.However,comparisonofresultsfromexposuresindifferentlocationsmustalsoconsidertheeffectsoftemperature,moistureandotherclimaticfactorsonthetypeandrateofproductdegradationaswellasthelevelofsolarradiation.NOTE3Whiletheinstrumentperformancedatadescribedintables1and2maybeconsideredasaspecification,especiallyforinstrumentsthatmeasuretotalsolarradiation,instrumentscurrentlyavailableformeasurementofsolarultravioletradiationmaynotmeetalloftheperformancefeatureslisted.b)ComparisonbetweennaturalexposureandlaboratoryacceleratedtestsMeasurementsofultravioletand/orvisibleradiationusingtheinstrumentsandproceduresspecifiedinthisInternationalStandardmayaidincomparingresultsfromartificialacceleratedtestswiththosefromnaturalexposure.Whenthisisdone,comparisonshouldbemadeinseveralpassbands.Comparingtheradiationinashort-wavelengthUVpassbandisnecessarytogaugetherelativeseverityoftheexposureandtoestimatetheriskthattheacceleratedtestmightproducedegradationreactionsthatwouldnotoccurinanaturalexposure.Theintensityandspectraldistributionoftheradiationusedinacceleratedtestsisonlyonefactorindeterminingthecomparabilityofresultsobtainedinnaturalexposures.Onemustalsoconsidertemperature,moistureandotherclimaticfactors(notablypollutioneffects)whenmakingthesecomparisons.Becauseofdifferencesbetweenamaterial'sresponsetoincreasedradiationlevelsandpossible
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:13P;A4
【正文语种】:英语