BS EN ISO 15721-2001 金属覆层.孔隙率试验.用亚硫酸和二氧化硫蒸汽对金和钯涂层孔隙率的测定

作者:标准资料网 时间:2024-05-04 09:53:46  浏览:8769   来源:标准资料网

【英文标准名称】:Metalliccoatings-Porositytests-Porosityingoldorpalladiumcoatingsbysulfurousacid/sulfurdioxidevapour
【原文标准名称】:金属覆层.孔隙率试验.用亚硫酸和二氧化硫蒸汽对金和钯涂层孔隙率的测定
【标准号】:BSENISO15721-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-07-15
【实施或试行日期】:2001-07-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:腐蚀;覆层;钯;金属覆层;金;电触点;电解镀层;电连接器
【英文主题词】:Coatings;Corrosion;Corrosionprotection;Defects;Definition;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】:20P;A4
【正文语种】:英语