DIN EN 12476-2000 金属磷酸盐转化膜 制定要求的方法 英文版.pdf

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1、DEUTSCHENORMOctober2001PhosphateconversioncoatingsofmetalsMethodofspecifyingrequirementsDINEnglishversionofDINEN12476EN12476EuropeanStandardEN12476:2000hasthestatusofaDINStandard.Acommaisusedasthedecimalmarker.NationalforewordThisstandardhasbeenpreparedbyCEN/TC262’Metallicandotherorgan

2、iccoatings’(Secretariat:UnitedKingdom).TheresponsibleGermanbodyinvolvedinitspreparationwastheNormenausschussMaterialprüfung(MaterialsTestingStandardsCommittee),TechnicalCommitteeChemischeundelektrochemischeÜberzüge.Thecommitteedecidedtotetainthespecificationsofsubclause7.2(cf.clausesNA

3、.1toNA.5)andoftables7and8(cf.tablesNA.1andNA.2)ofDIN50942byintroducingtheminthenationalannexbelow.DINENISO3892isthestandardcorrespondingtoEuropeanStandardENISO3892referredtoinclause2oftheEN.AmendmentsThisstandarddiffersfromtheDINEN12476,July2000edition,andDIN50942,September1996edition,

4、inthatanationalannexhasbeenintroduced.PreviouseditionsDIN50942:1955-01,1973-11,1987-05,1996-09;DINEN12476:2000-07.NationalAnnexNAStandardreferredto(andnotincludeinNormativereferencesandBibliography)DINENISO3892Conversioncoatingsonmetallicmaterials–Determinationofcoatingmassperunitareaw

5、ithgravimetricmethods(ISO3892:1980Continuedonpages2and3.ENcomprises12pages.Page2DINEN12476:2001-10NotesontheuseofthisstandardNA.1ChemicalcompositionofcoatingInadditiontothemethodsspecifiedinthisannex,otheranalyticalmethodswithatleastthesameprecisionmaybeused.Thedetectionofphosphateinac

6、oatingshallbetakenasproofthatitisaphosphatecoating(cf.subclauseNA.2).Toestablishthatacoatingisamanganesephosphatecoating,itissufficienttoestablishthepresenceofmanganese(forferroussubstratesonly)(cf.subclauseNA.3).Toestablishthatacoatingisazincphosphateofzinccalciumphosphatecoatings,iti

7、ssufficienttoestablishthepresenceofzincorzincandcalcium,respectively(forzinc-freesubstrates)(cf.subclauseNA.5).Ifneithermanganesenorzinchasbeendetectedinaphosphatecoatingonasubstrateofferrousmaterial,thenthecoatingiscertaintobeanironphosphatecoating.NA.1.1ReagentsThefollowingreagents