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【英文标准名称】:Metalliccoatings-Porositytests-Porosityingoldorpalladiumcoatingsbysulfurousacid/sulfurdioxidevapour
【原文标准名称】:金属涂层孔隙率检测用硫酸/二氧化硫蒸汽法检测基体上金或钯涂层的孔隙率
【标准号】:ISO15721-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-04
【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/TC107
【标准类型】:()
【标准水平】:()
【中文主题词】:钯;孔容;金覆层;破坏试验;定义;孔隙率;空隙率试验;防腐蚀;缺陷;金属覆层;表面性质;腐蚀;试验;覆层
【英文主题词】:Coatings;Corrosion;Corrosionprotection;Defects;Definitions;Destructivetesting;Goldcoatings;Metalcoatings;Palladium;Porevolume;Porosity;Porositytest;Surfaceproperties;Testing
【摘要】:Thistestmethodcoversequipmentandmethodsfordeterminingtheporosityofgoldorpalladiumcoatings,particularlyelectrodepositsandcladmetalsusedonelectricalcontacts.Itisdesignedtoshowwhethertheporositylevelislessthanorgreaterthanagivenvaluewhichbyexperienceisconsideredbytheusertobeacceptablefortheintendedapplication.Thisporositytestinvolvescorrosionreactionsinwhichtheproductsdelineatedefectsitesincoatings.Sincethechemistryandpropertiesoftheseproductsmaynotresemblethosefoundinnaturalorserviceenvironmentsthistestcannotberecommendedforthepredictionoftheelectricalperformanceofcontactsunlesscorrelationisfirstestablishedwithserviceexperience.Thistestisintendedtobeusedforquantitativedescriptionsofporosity(suchasnumberofporesperunitareaorpercontact)oncoatingsthathaveasufficientlylowporedensitysothatthecorrosionsitesarewellseparatedandcanbereadilyresolved.Asageneralguidelinethiscanbeachievedforporedensitiesuptoabout100/cm.Abovethisvaluethetestsareusefulforthequalitativedetectionandcomparisonsofporosity.Avarietyofotherporositytestingmethodsaredescribedintheliterature[5][6].OtherISOporositytestmethodsaredescribedISO10308,ISO12687,ISO14647andISO15720.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:7P.;A4
【正文语种】:英语


【英文标准名称】:ELECTRONICTUBESWITHQUALITYCONFORMANCEPROCEDURES.PULSEMODULATORANDCLIPPERORTRIGGERTUBES.PARTICULARREQUIREMENTS.
【原文标准名称】:电子管质量检验.脉冲调制管和限幅管或闸流管的特殊规定
【标准号】:NFC95-214-1971
【标准状态】:作废
【国别】:法国
【发布日期】:1971-12
【实施或试行日期】:1971-12-03
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:电子管;脉冲调制管;削波管;闸流管;试验;电气试验
【英文主题词】:tests;testing;electricaltests;electricaltesting;electrontubes;pulsemodulationtubes;pulse-modulatortubes;clippertubes;thyratrons
【摘要】:
【中国标准分类号】:L39
【国际标准分类号】:
【页数】:11P;A4
【正文语种】:其他