BS ISO 5-4-2009 摄影和印刷技术.密度测量.反射密度用几何条件
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【英文标准名称】:Photographyandgraphictechnology-Densitymeasurements-Geometricconditionsforreflectiondensity
【原文标准名称】:摄影和印刷技术.密度测量.反射密度用几何条件
【标准号】:BSISO5-4-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2010-04-30
【实施或试行日期】:2010-04-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;光密度分析;光密度分析法;密度;密度测量;测定;几何的;印刷技术;作标记;数学计算;测量;测量设备;测量技术;光学的;光密度;光学测量;光学;摄影技术;摄影材料;摄影;性能;辐射通量密度;辐射测量法;反射;反射特性;反射系数;感光测定;规范(验收);试验
【英文主题词】:Definitions;Densitometricanalysis;Densitometry;Density;Densitymeasurement;Determination;Geometric;Graphictechnology;Marking;Mathematicalcalculations;Measurement;Measuringequipment;Measuringtechniques;Optical;Opticaldensity;Opticalmeasurement;Optics;Phototechnology;Photographicmaterials;Photography;Properties;Radiantfluxdensity;Radiometry;Reflection;Reflectioncharacteristics;Reflectionfactor;Sensitometry;Specification(approval);Testing
【摘要】:
【中国标准分类号】:A15
【国际标准分类号】:37_040_01
【页数】:26P;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
基本信息
| 标准名称： | Ni-B-Si系自熔合金粉 |
| 英文名称： | Metallic powder material --Self-fluxing Ni-B-Si alloy powder |
| 中标分类： |
冶金 >>
粉末冶金 >>
金属与合金粉末 |
| ICS分类： |
机械制造 >>
焊接、钎焊和低温焊 >>
焊接消耗品
|
| 替代情况： | 原标准号GB/T 5315-1985 |
| 发布日期： | 2006-07-27 |
| 实施日期： | 2006-10-11 |
| 首发日期： | |
| 作废日期： | |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2006-10-11 |
| 页数： | 3页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 冶金 粉末冶金 金属与合金粉末 机械制造 焊接 钎焊和低温焊 焊接消耗品
