EN ISO 4048-2008 皮革.化学试验.二氯甲烷中溶解物质和自由脂肪酸含量的测定
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【英文标准名称】:Leather-Chemicaltests-Determinationofmattersolubleindichloromethaneandfreefattyacidcontent(ISO4048:2008);GermanversionENISO4048:2008
【原文标准名称】:皮革.化学试验.二氯甲烷中溶解物质和自由脂肪酸含量的测定
【标准号】:ENISO4048-2008
【标准状态】:现行
【国别】:
【发布日期】:2008-05
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:化学分析和试验;定义;含量测定;二氯甲烷;萃取分析法;脂肪酸;皮革;材料;材料测试;定量分析;试剂;可溶的;物质;测试
【英文主题词】:Chemicalanalysisandtesting;Definition;Definitions;Determinationofcontent;Dichloromethane;Extractionmethodsofanalysis;Fattyacids;Leather;Materials;Materialstesting;Quantitativeanalysis;Reagents;Soluble;Substances;Testing
【摘要】:
【中国标准分类号】:Y47
【国际标准分类号】:59_140_30
【页数】:11P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforPorosityinGoldorPalladiumCoatingsonMetalSubstratesbyGel-BulkElectrography
【原文标准名称】:凝胶体电谱法测定金属基物上金或钯涂层孔隙度的标准试验方法
【标准号】:ASTMB798-1995(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【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】:B02.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:electrography;gel;gelelectrography;goldcoatings;goldplatings;palladiumcoatings;palladiumplatings;plating;porosity;porositytesting;Contamination--coatings;Corrosion--electrodepositedcoatings;Defects--coatings;Destructivetesting--coatin
【摘要】:Noblemetalcoatings,particularlygoldorpalladium,areoftenspecifiedforthecontactsofseparableelectricalconnectorsandotherdevices.Electrodepositsaretheformofgoldorpalladiumwhichismostusedoncontacts,althoughgoldandpalladiumarealsoemployedascladmetalandasweldmentsonthecontactsurface.Theintrinsicnobilityofgoldandtoacertainextentpalladiumenablesthemtoresisttheformationofinsulatingfilmsthatcouldinterferewithreliablecontactoperation.Inorderthatthenobilityofgoldbeassured,porosity,cracks,andotherdefectsinthecoatingthatexposebasemetalsubstratesandunderplatesmustbeminimalorabsent,exceptinthosecaseswhereitisfeasibletousethecontactsinstructuresthatshieldthesurfacefromtheenvironmentorwherecorrosioninhibitingsurfacetreatmentsforthedepositareemployed.Thelevelofporosityinthecoatingthatmaybetolerabledependsontheseverityoftheenvironmenttotheunderplateorsubstrate,designfactorsforthecontactdeviceliketheforcewithwhichitismated,circuitparameters,andthereliabilityofcontactoperationthatitisnecessarytomaintain.Also,whenpresent,thelocationofporesonthesurfaceisimportant.Iftheporesarefewinnumberorareoutsideofthezoneofcontactofthematingsurfaces,theirpresencecanoftenbetolerated.Methodsfordeterminingporesonacontactsurfacearemostsuitableiftheyenabletheirpreciselocationandnumberstobedetermined.Contactsurfacesareoftencurvedorirregularinshape,andtestingmethodsshouldbesuitableforthem.Inaddition,theseverityofporosity-determiningtestsmayvaryfromprocedurescapableofdetectingallporositytoproceduresthatdetectonlygrossdefects.Thetestmethodinthisdocumentisgenerallyregardedassevere.Therelationshipofporositylevelsrevealedbyparticularteststocontactbehaviormustbemadebytheuseroftheseteststhroughpracticalexperienceorjudgment.Thus,absenceofporosityinthecoatingmaybearequirementforsomeapplications,whileafewporesinthecontactzonemaybeacceptableforothers.Thistestmethodiscapableofdetectingporosityorotherdefectsingoldorpalladiumcoatingsthatcouldparticipateinsubstratecorrosionreactions.Inaddition,itcanbeusedoncontactshavingcomplexgeometrysuchaspin-socketcontacts(althoughdifficultymaybeexperiencedininspectingdeeprecesses).1.1Thistestmethodcoversequipmentandtechniquesfordeterminingporosityinnoblemetalcoatings,particularlyelectrodepositsandcladmetalsusedonelectricalcontacts.1.2Thetestmethodisdesignedtoshowwhethertheporositylevelislessorgreaterthansomevaluewhichbyexperienceisconsideredbytheusertobeacceptablefortheintendedapplication.1.3OtherporositytestingmethodsareoutlinedinGuideB765.Detailedcriticalreviewsofporositytestingarealsoavailable.OtherporositytestmethodsareB735,B741,B799,andB809.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesinparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.ItistheresponsibilityoftheuserofthisstandardtobecomefamiliarwithallhazardsincludingthoseidentifiedintheappropriateMaterialSafetyDataSheet(MSDS)forthisproduct/materialasprovidedbythemanufacturer,toestablishappropriatesafetyandhealthpractices,anddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSections7and8.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:6P.;A4
【正文语种】:英语
【英文标准名称】:Machinetools;symbols;numericallycontrolledmachinetools
【原文标准名称】:机床.符号.数控机床
【标准号】:DIN55003-3-1981
【标准状态】:作废
【国别】:德国
【发布日期】:1981-08
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:机床;图形符号;坐标(数学);数据处理;图形表示;符号;程序设计;计算机控制;数值控制
【英文主题词】:Computerizedcontrol;Coordinates(mathematics);Dataprocessing;Graphicrepresentation;Graphicsymbols;Machinetools;Numericalcontrol;Programming;Symbols
【摘要】:Machinetools;symbols;numericallycontrolledmachinetoolsMachines-outils;symboles;machines-outilsàcommandenumériqueZusammenhangmitdervonderInternationalOrganizationforStandardization(ISO)herausgegebenenInternationalenNormISO2972-
【中国标准分类号】:J50
【国际标准分类号】:01_080_30;25_040_20
【页数】:12P;A4
【正文语种】:德语
