ASTM B 215-1996 金属粉末的最后批量抽样标准实施规程

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【英文标准名称】:StandardSpecificationforElectrodepositedCoatingsofCadmium
【原文标准名称】:镉电沉积涂层的标准规范
【标准号】:ASTMB766-1986(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1986
【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】:B08.08.04
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:cadmium;electrodepositedcoatings;electrodepositedcoatings;cadmium;Adhesion--coatings;Aerospaceapplications--specifications;Cadmiummetals/alloys--specifications;Cadmiummetals(coating/plating)--specifications;Chromatecoatings--specificati
【摘要】:1.1Thisspecificationcoverstherequirementsforelectrodepositedcadmiumcoatingsonproductsofiron,steel,andothermetals.Note18212;Cadmiumisdepositedasacoatingprincipallyonironandsteelproducts.Itcanalsobeelectrodepositedonaluminum,brass,berylliumcopper,copper,nickel,andpowdermetallurgyparts.1.2Thecoatingisprovidedinvariousthicknessesuptoandincluding25x03BC;meitheraselectrodepositedorwithsupplementaryfinishes.1.3Cadmiumcoatingsareusedforcorrosionresistanceandforcorrosionpreventionofthebasismetalpart.Theas-depositedcoating(TypeI)isusefulforthelowestcostprotectioninamildornoncorrosiveenvironmentwhereearlyformationofwhitecorrosionproductsisnotdetrimentalorharmfultothefunctionofacomponent.Theprimepurposeofthesupplementarychromatefinishes(TypesIIandIII)ontheelectroplatedcadmiumistoincreasecorrosionresistance.Chromatingwillretardorpreventtheformationofwhitecorrosionproductsonsurfacesexposedtovariousenvironmentalconditionsaswellasdelaytheappearanceofcorrosionfromthebasismetal.1.4Cadmiumplatingisusedtominimizebi-metalliccorrosionbetweenhigh-strengthsteelfastenersandaluminumintheaerospaceindustry.Undercuttingofthreadsonfastenerpartsisnotnecessaryasthecadmiumcoatinghasalowcoefficientoffrictionthatreducesthetighteningtorquerequiredandallowsrepetitivedismantling.1.5Cadmium-coatedpartscaneasilybesolderedwithouttheuseofcorrosivefluxes.Cadmium-coatedsteelpartshavealowerelectricalcontactresistancethanzinc-coatedsteel.Thelubricityofcadmiumplatingisusedonspringsfordoorsandlatchesandforweavingmachineryoperatinginhighhumidity.Corrosionproductsformedoncadmiumaretightlyadherent.Unlikezinc,cadmiumdoesnotbuildupvoluminouscorrosionproductsonthesurface.Thisallowsforproperfunctioningduringcorrosiveexposureofmovingparts,threadedassemblies,valves,anddelicatemechanismswithoutjammingwithdebris.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:9P.;A4
【正文语种】:英语


【英文标准名称】:Conveyorbelts.Heatresistance.Testmethod.
【原文标准名称】:传送带.耐热性.试验方法
【标准号】:NFT47-110-1-1987
【标准状态】:作废
【国别】:法国
【发布日期】:1987-12-01
【实施或试行日期】:1987-12-20
【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】:输送带;热阻;分类系统;天然橡胶;分类;橡胶制品;试验;合成橡胶
【英文主题词】:Conveyorbelts;Heatresistance;Heatingtests;Testing;Tests
【摘要】:
【中国标准分类号】:G42
【国际标准分类号】:53_040_20
【页数】:2P;A4
【正文语种】:其他