【英文标准名称】:StandardPracticeforLocatingtheThinnestSpotinaZinc(Galvanized)CoatingonIronorSteelArticles
【原文标准名称】:用普力斯试验法(硫酸铜浸蚀)确定铁或钢制品上镀锌层最薄点的标准实施规程
【标准号】:ASTMA239-1995(2009)e1
【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】:A05.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:bolts;electroplated;hardware;hotdipped;nuts;screws;thinnestspot;zinccoatingthickness;Castiron(testing);Coppersulfatedip;Forgings(zinc-coated(galvanized));Hot-dip(galvanized)coatings;Ironsheets--zinc-coated(galvanized);Pre
【摘要】:Thispracticeisdesignedtolocatethethinnestportionsofthezinccoatingonnewlycoateditems(seeAppendixX1).Variationsincoatingthicknesscanbeduetotheprocessbywhichthezincisapplied(hotdipped,electroplated,orsprayed)orbythegeometryofthepartthatiscoated.Duringhot-dipgalvanizing,thecoatingthicknessisaffectedbythedrainagepatternofthemoltenzinc,whileduringzincspraying(metallizing),coatingthicknesscanbedependentontheoperator''smanipulationofthespraynozzle.Thegeometryofthepartcanalsoinfluencecoatingthicknessespeciallyduringhot-dipgalvanizing,wherepeaksandvalleysonthepartcancausemoltenzinctobuilduporthinout.Thispracticeisdesignedtoidentifythoseareasofthepartwherethecoatingisthin.1.1Thispracticecoverstheprocedureforlocating,bytheuseofasolutionofcoppersulfate,thethinnestspotinazinccoating(hotdipped,electroplated,orsprayed)onironorsteelarticlesthatarecoatedaftertheshapeisproducedbycasting,drawing,pressing,orotherformingmethods.Examplesare:electricalmetallictubingandrigidconduitpipe,castingsandforgings,andstructuralsteel;onspecialhardware,suchaspoleline,builder''s,andfarmimplementhardware;bolts,nuts,screws,andothermiscellaneousgeneralhardware.1.2Theuseofthispracticewithzinccoatingdepositedthroughdifferentprocesses(suchashotdipped,electroplated,orsprayed)requirescautionininterpretationsincetheendpointmayvaryconsiderablybetweendifferentzinc-coatingsystems.1.3Excludedfromthispracticeissheetsteelfromhot-diporelectrocoatinglinesasthesheetproductsarenormallysubjecttoadditionalformingafterthecoatingprocess.Alsoexcludedfromthispracticeareallzinc-coatedwireandwireproductseithercontinuouslyorbatchcoatedbeforeorafterforming.Warning8212;Pastresearch(datingfromaround1963)hasindicatedthatthispracticecanbeinfluencedbyoperatortechnique.Variationscanbeduetothedifferenceinhandpressureusedtowipethesampleortheinabilityoftheoperatortorecognizetheendpoint.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:4P.;A4
【正文语种】:英语