SAE-AMS-2700C-2008

SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.Copyright©2008SAEInternationalAllrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofSAE.TOPLACEADOCUMENTORDER:Tel:[phone](insideUSAandCanada)Tel:[phone](outsideUSA)Fax:[phone]Email:[e-mail]:://:Method1-PassivationinNitricAcidMethod2-PassivationinCitricAcidMethod1shallbeusedunlessMethod2isauthorizedbythecognizantengineeringorganization.1.3.2TypesThefollowingtypesmaybespecifiedforMethod1:Type1LowTemperatureNitricAcidwithSodiumDichromateType2MediumTemperatureNitricAcidwithSodiumDichromateType3HighTemperatureNitricAcidwithSodiumDichromateType440%NitricAcidforFreeMachiningSteelsType5Anodic,forHighCarbonMartensiticSteelsType6LowTemperatureNitricAcidType7MediumTemperatureNitricAcidType8MediumTemperature,HighNitricAcidConcentrationWherenotypeisspecified,theprocessormayuseanyofthelistedtypesthatmeettherequirementsgivenherein.--```,,`,,,,````,`,``,``,`,`,`,,-`-`,,`,,`,`,,`---SAEAMS2700C-2-1.3.3ClassesPassivationverificationclassesareasfollows:1.3.3.1Class1Thefollowingtypesofpartsshallbeselectedfortestinginaccordancewith4.3.1.1.3.3.1.1Fasteners,includingnuts,bolts,washers,rivetsandrelatedhardwarewhereatestfrequencyisnotdefinedintheprocurementdocuments.1.3.3.1.2StandardpartsdefinedbydrawingslabeledAN,MS,NASorsimilarwherefrequencyoftestisnototherwisedefined.1.3.3.1.3Whenspecifiedbypurchaser.1.3.3.2Class2Frequencyofcorrosiontestingshallbeonepartperlot.1.3.3.3Class3Frequencyoftestingshallbeonaperiodicbasis.1.3.3.4Class4PartsforwhichAMS-QQ-P-35orQQ-P-35isspecifiedshallbeacceptancetestedinaccordancewith4.3.4.1.3.3.5Whennoclassisspecifiedandneither1.3.3.1nor1.3.3.4apply,class2shallapply.1.4Safety-HazardousMaterialsWhilethematerials,methods,applications,andprocessesdescribedorreferencedinthisspecificationmayinvolvetheuseofhazardousmaterials,thisspecificationdoesnotaddressthehazardswhichmaybeinvolvedinsuchuse.Itisthesoleresponsibilityoftheusertoensurefamiliaritywiththesafeandproperuseofanyhazardousmaterialsandtotakenecessaryprecautionarymeasurestoensurethehealthandsafetyofallpersonnelinvolved.2.APPLICABLEDOCUMENTSTheissueofthefollowingdocumentsineffectonthedateofthepurchaseorderformsapartofthisspecificationtotheextentspecifiedherein.Thesuppliermayworktoasubsequentrevisionofadocumentunlessaspecificdocumentissueisspecified.Whenthereferenceddocumenthasbeencancelledandnosupersedingdocumenthasbeenspecified,thelastpublishedissueofthatdocumentshallapply.2.1ASTMPublicationsAvailablefromASTMInternational,100BarrHarborDrive,P.O.BoxC700,WestConshohocken,PA19428-2959,Tel:[phone],(Fog)TestingApparatusASTMD1193ReagentWaterSAEAMS2700C-3-3.REQUIREMENTS3.1Procedure3.1.1Passivationshallbeperformedonlyonsurfacesfreefromwaterbreaksandvisiblerustorscale.See8.8.3.1.2Method1-PassivationinNitricAcid3.1.2.1PassivationshallbeaccomplishedbyimmersioninabathinaccordancewithTable1.Whenpermittedbythecognizantengineeringorganization,othernitricacidsolutionsmaybeused.See8.13.3.1.2.2Ironconcentrationinthepassivatingbathshallnotexceed0.5weightpercent.3.1.2.3Whenaspecificpassivationtypeisnotspecified,Table4maybeconsultedforrecommendedtypes.TABLE1-METHOD1PASSIVATIONTYPESTypeFeatureValue1BathComposition20to25%byvolumeofHNO32to3%byweightNa2Cr2O7·2H2OBathtemperature70to90°F(21to32°C)Immersiontime30minutesminimum2BathComposition20to25%byvolumeofHNO32to3%byweightNa2Cr2O7·2H2OBathtemperature120to130°F(49to54°C)Immersiontime20minutesminimum3BathComposition20to25%byvolumeofHNO32to3%byweightNa2Cr2O7·2H2OBathtemperature145to155°F(63to68°C)Immersiontime10minutesminimum4BathComposition38to42%byvolumeofHNO32to3%byweightNa2Cr2