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【英文标准名称】:Coatingsonmetalfasteners-Specificationformechanicallyappliedzincandzincbasedcoatings
【原文标准名称】:金属紧固件涂层.采用机械法施加锌涂层规范
【标准号】:BS7371-7-2010
【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】:外观;铬酸盐;覆层工艺;覆层;转化膜;耐腐蚀性;名称与符号;紧固件;识别方法;金属覆层;金属;钝化;防护覆层;厚度;螺纹紧固件;锌;锌合金
【英文主题词】:Appearance;Chromates;Coatingprocesses;Coatings;Conversioncoating;Corrosionresistance;Designations;Fasteners;Identificationmethods;Metalcoatings;Metals;Passivation;Protectivecoatings;Thickness;Threadedfasteners;Zinc;Zincalloys
【摘要】:ThispartofBS7371specifiesrequirementsforcoatingsappliedbymechanicallyimpactingzincpowder,orzincbasedpowderontothecomponentsurfaceinanaqueousmedium.Thecoatingisnotappliedbyusingimpactmediaacceleratedbycompressedairorcentrifugemethods.Thecoatingsconsistprincipallyofzincandcanbelubricatedtogivecontrolledtorque/clampingforcepropertieswhenrequired.ThispartofBS7371alsospecifiesrequirementsfor:a)thecoatingthickness;b)thetypeofconversiontreatmenttobeapplied,whichcanbehexavalent,tri-valentorchromiumfree;c)thequalityassessmentofthecorrosionresistanceofunusedcoatedpartswhensubjectedtoneutralsaltspraytesting;NOTE2See,forexample,BSENISO9227.d)theadhesiontest.Thecoatingsaresuitableforapplicationtometalcomponentssuchas:1)parallelthreadedfastenersandaccessories;2)screwsthatcutorformtheirownthreads,e.g.self-tappingscrews;NOTE3See,forexample,BS4174.3)woodscrews;NOTE4See,forexample,BS1210.4)springsandspringcomponents;5)pipenutsandconnectorswithparallelortaperedthreads;6)compositefastenersincorporatingnon-conductingmaterials(e.g.rubber-bondedassembly).Whenthesecoatingsareappliedtonon-ferrousfasteners,theonlypartofthespecificationthatappliesisthecoatingthicknessrequirements.
【中国标准分类号】:A29
【国际标准分类号】:21_060_10;25_220_40
【页数】:22P.;A4
【正文语种】:英语