【英文标准名称】:StandardPracticesforPreparationofMagnesiumAlloySurfacesforPainting
【原文标准名称】:涂漆用镁合金表面预处理的标准实施规范
【标准号】:ASTMD1732-2003(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【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】:B08.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:anodictreatments;magnesium;painting;surfacepreparation;Magnesiumalloys;Specimenpreparation(fortesting)--paints/relatedcoatings
【摘要】:1.1Thesepracticescovertwoclassesoftreatmentforpreparationofmagnesiumalloysurfacesforpainting,asfollows:ClassIx2014;ChemicalTreatments.ClassIIx2014;AnodicTreatments.Ingeneral,thelattertreatmentsarethemoreprotectiveofthetwoclasses.Mechanical(abrasive)treatments,solventcleaning,alkalinesolutiontreatments,andacidpicklesnotresultinginprotectiveconversioncoatingsaresuitablepreliminarytreatmentsonlyformetaltobeexposedundermildlycorrosive(indoor)exposures.Whenahighdegreeofcorrosionprotectionandpaintadhesionaredesired,asinmanyoutdoorenvironments,surfacepreparationbyoneoftheaboveconversion-coatclassesisnecessary.Thehexavalentchromiumbasedmethodsgivenarenotrecommendedashexavalentchromiumisaknowncarcinogen.Note18212;TestingofCoatingsx2014;Qualitycontroltestsofcoatingsarefrequentlydesirable,andthesegenerallyconsistofexposures,withorwithoutpaint,tosaltspray,humidity,ornaturalenvironments,withsuitableproceduresforassessingthedegreeofbreakdownsufferedafterfixedtimeintervals.Itisrecommendedthatqualitycontroltestsofcoatingsshallbemadeasfaraspossiblewithhigh-puritymaterial(forexampleAZ31Aalloy),theinherentcorrosionrateofwhichisrelativelyconsistentfrombatchtobatch)andthatprecautionsshallbetakentoremovesurfacecontaminationbeforecoatingsareapplied.Suchcontaminationshallberemovedbyacidpicklingtoadepthofatleast0.001in.(25x03BC;m)perside.1.2Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.(SeeNote11.)
【中国标准分类号】:A29
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】:英语