ASTM B 840-1994 锌钴合金沉积物用电解镀层标准规范
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【英文标准名称】:StandardSpecificationforElectro-depositedCoatingsforZincCobaltAlloyDeposits
【原文标准名称】:锌钴合金沉积物用电解镀层标准规范
【标准号】:ASTMB840-1994
【标准状态】:作废
【国别】:美国
【发布日期】:1994
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:锌;锌合金;电解镀层;腐蚀;耐蚀合金;钴合金;钴合金电镀锌
【英文主题词】:zinc;resistantalloys;cobaltalloy;electrodepositedzinccobaltalloyplating;corrosion;electrodepositedcoatings;zincalloys
【摘要】:
【中国标准分类号】:A29
【国际标准分类号】:77_120_70
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforOpenCellContentofRigidCellularPlastics
【原文标准名称】:硬质泡沫塑料的开孔含量的标准试验方法
【标准号】:ASTMD6226-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D20.22
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:cellwall;cellularplastics;closedcell;opencell;pycnometer;Cellularplastics;Cellwall;Closedcell;Opencellcontent;Pycnometer/pycnometry
【摘要】:Thistestmethodisintendedtobeusedinspecificationswhereporosityofcellularplasticshasadirectbearingontheirenduse.Forexample,forthermalinsulationapplications,ahighpercentageofclosedcellsisnecessarytopreventescapeofgasesandtopromotelowthermalconductivity.Inflotationapplications,highclosed-cellcontentgenerallyreduceswaterabsorption.Beforeproceedingwiththistestmethod,referenceshallbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,ordimensions,orboth,andtestingparameterscoveredinthematerialsspecificationshalltakeprecedenceoverthosementionedinthistestmethod.Iftherearenomaterialspecifications,thenthedefaultconditionsapply.1.1Thistestmethodcoverscellularplastics,whicharecomposedofmembranesorwallsofpolymerseparatingsmallcavitiesorcells.Thesecellsmaybeinterconnecting(opencell),non-connecting(closedcell),oranycombinationofthesetypes.Thistestmethoddeterminesnumericalvaluesforopencells.Itisaporositydetermination,measuringtheaccessiblecellularvolumeofamaterial.Theremainingvolumeisthatoccupiedbyclosedcellsandcellwalls.Sinceanyconvenientlysizedspecimencanonlybeobtainedbysomecuttingoperation,afractionoftheclosedcellswillbeopenedbyspecimenpreparationandwillbeincludedasopencells,(seeNote2).1.2Thistestmethodprovidesgoodaccuracyonpredominantlyhighlyopen-celledmaterials.Bynotaccountingforclosedcellsthatwereopenedduringspecimenpreparation,theaccuracydecreasesastheclosedcellcontentincreasesandasthecellsizeincreases.1.3ThevaluesasstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesaregivenforreferenceonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThistestmethodandISO4590usethesamebasicprinciplesbutaresignificantlydifferentinexperimentaldetail.Note28212;TwoproceduresforcorrectingforcellsopenedduringspecimenpreparationaredescribedinAppendixX1.1.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:7P.;A4
【正文语种】:英语
基本信息
标准名称: | 侧向压紧器 |
中标分类: |
机械 >>
工艺装备 >>
组合卡具 |
替代情况: | HB 1342~1343-75 |
发布日期: | 1987-04-08 |
实施日期: | 1987-07-01 |
首发日期: | 1900-01-01 |
作废日期: | 1900-01-01 |
出版日期: | 1900-01-01 |
页数: | 1页 |
适用范围
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所属分类: 机械 工艺装备 组合卡具