NOT MEASUREMENT SENSITIVE I P41L-A-8625F 10 …

1 NOTMEASUREMENTSENSITIVEIP41L-A-8625F10 September1993 SUPERSEDINGhlIL-A-8625E25 Aprll1988 MILITARYSPECIFICATIONA?KM) ( ).~ ( ) ,conventionalcoat!ngsproducedfromchromic acidbath( )Chromicacidanodlzlng,Iowvoltageprocess, 22~2V,( )Hon-chromicacidanodtzlng,foruseasanon-c hromatealternativeforTypeIandIBcoatings( )Sulfurlcacfdanodlztng,conventionalcoati ngsproducedfromsulfurfcacidbath( )Thinsulfurlcacidanodlzlng,foruseasanon- chromatealternativeforTypeIandIBcoatings ( )HardAnodlcCoatings( )Class1-Non-dyed( )Class2-Oyed( )Beneflclalcomments(recommendations,addl ttons,deletlons)andanypertinentdatawhich maybeofusetnimprovingthisdocumentshouldb eaddressedto.

2 (hmnandlngOfficer,NavalAlrWarfareCenterA ircraftOivtslonLakehurst,CodeSR3,Lakehur st,NJ08733-5100,byusingtheself-addressed StandardizationOocumentImprovementPropos al(00 Form1426) :Approvedforpublicrelease; ,theissuesofthesedocumentsarethoselisted intheissueoftheDepartmentofDefenseIndexo fSpecificationsandStandards(DODISS)andsu pplementthereto, ,Epoxy-Polyamide,ChemicalandSolventResis tantMIL-C-81706-ChemicalConversionMateri alsforCoatingAluminumandAluminumAlloysMI L-P-85582-PrimerCoatings:Epoxy,Waterborn eFEDERALQQ-A-250/4-AluminumAlloy2024,Pla teandSheetSTANDARDSFEDERALFED-STD-141-Pa int,Varnish,Lacquer,andRelatedMaterials: MethodsForSamplingandTestingFED-STD-151- Metals.)

3 TestMethodsMILITARYMIL-STD-105-SamplingP roceduresandTablesForInspectionByAttribu te(Unlessotherwiseindicated,copiesoffede ralandmilitaryspecificationsandstandards areavailablefromDODSSP-CustomerService,S tandardizationDocumentsOrderDesk,700 RobbinsAvenue,Building40,Philadelphia,PA 19111-5094.) ( ).AMERICANSOCIETYFORASTMB117-ANSI/ASTMB1 37-ASTMB244-ASTMD822-TESTINGANDMATERIALS Unl~ssotherwisespecified,thearethoselist edintheissueofotherwisespecified,theissu esissuesofthedocumentscitedin(ASTM)Metho dofSaltSpray(Fog)TestingWeightofCoatingo nAnodicallyCoatedAluminum,MeasurementofT hicknessofAnodicCoatingsonAluminumandofO therNonconductiveCoatingsonNonmagneticBa sisMetalswithEddyCurrentInstruments,Meas urementofLightandWaterExposureApparatus( Carbon-ArcType)

4 ForTestingPaint,Varnish,LacquerandRelate dProducts,StandardPracticeforOperating2 MIL-A-8625 FAST14D2244-ColorDifferencesofOpaqueMate rtals,InstrumentalEvaluationofASTMG23-St andardPracticeforOperatingLightExposureA pparatus(Carbon-ArcType)MlthandHlthout14 aterforExposureofNon-metallicMater4alsAS TMG26-OperattngLtght-ExposureApparatus(X enon-ArcType)Withand141thoutMaterforExpo sureofNon-metalllcmatertals(Applicationf orcopiesshouldbeaddressedtotheAmertcanSo c~etyforTestingandMaterials,1916 RaceStreet,Phlladelph~a,PA19103.). ~ctbetweenthetextofthisdocumentandtheref erencescitedherein, ,however, ,causedbymachining,cutting,scratching,po lishing,buffing,roughening,bending,stret ching,deforming,rolling,sandblasting,vap orblasting,etching,heattreatmentconditio n,alloychemtstry!

5 Mbalanceandinclusions, ,etching, )roducecoatinqswhfchtieettherequirements ofthisspecification. Unlessother~isespecifiedtnth~contract,pu rchaseorderorapplicabledrawing( ), ,purchaseorderoramlicabledrawing( ),partsshallbeanodizedafterallheattreatm ent,-&ch?nlngmweld~ng, ,purchaseorderorapplicabledra~lng,anodic coatingsshallnotbeappltedtoassembleswhic hwI?lentraptheelectrolyteInjointsorreces ses(componentsshallbeanodizedseparatelyp riortoassembly).Whenanodizingofassemblie stsauthorizedbythecontract,purchaseorder orapplicabledrawing,theprocessingmethodu sedshallnotresultinsubsequentdamagetothe assemblyfromelectrolyteentrapment(TypeIo r1 Acoatingsshallbeusedunlessanothercoating TypeIsspec~fled).

6 Assembleswhichcontainnon-aluminumpartssu chassteel,brassororganicsubstances,which wouldbeattackedbypretreatmentoranodiz~ng solutionsorwouldpreventuniformformationo ftheanodiccoating,shallnotbeanodizedasas semblies, ~zlngcomplexshapeswhichwillentraptheelec trolyteinrecesses,theprocessingmethoduse dshallnotresultinsubsequentdamagetothepa rtfromelectrolyteentrapment(TypeIorIAcoa tingsshallbeusedunlessanothercoatingType isspecified). , ,oxidesandsoils,suchasgreases,oil, ,suchassteelwool,ironoxiderougeandsteelw ire,whichmaybecomeembeddedinthemetalanda cceleratecorrosionofaluminumandaluminuma lloys,areprohibitedasameansofmechanicalc leaning, ( ). ( ),partsfabricatedtoproduceahighlyreflect ivesurfaceshallbechemicallyorelectrochem icallybrightened,priortoanodiccoating( ).

7 (mechanicaldamageandcontactmarks).Unless otherwisespecified( ), ,touchUPshallonlybeallowedinareaswhichwi llnotbesubjectedtoabrasion( ).Themechanicallydamagedarea(s) ( ), ,purchaseorderorapplicabledrawings( ), ,IB, (non-chromicacid) thecontract,purchaseorderorapplicabledra wing, ; ; ,IB,orICcoatingshallbeintherequiredtempe robtainedbyheattreatment,suchas-T4,-T6,o rT73, , ,lum! ,suchas-T4,-T 6,orT73, , ( ).UnlessotherwisespeclfledInthecontract, purchaseorderorapplicabledrawing, ,suchas-T4,-T6,orT73, ,( ), ~ ass2 IISspeclfledinthecontractorpurchaseorder ( ),theanodiccoatingshallbeuniformlydyedor pigmentedbyexposuretoasolutlonofasuitabl etypedyeor (orcoloruniformity) ,thecolorandcoloruniformityrequirementss hallbeasspecifiedonthecontract,purchaseo rderorapplicabledrawing{ ).}

8 ~ty( ). ,16,IC,11, !ortodyeingorsea14ng,Type1,1%,IC,11, ( ). ,IB,IC,11, (mg/ft2)IIandIB200minimumIC1/200minimum- 700maximumII1000minimumIIB200minimum-100 0maximumj-Coatingweightsover700 ( ). ~ ,specimensshallbevisuallyexaminedtodeter minethatallofthefollowingcond- ( ), , , , , , (a)and(b)above,TypeIandIBtestspecimenssh allnotexhibitpatchydarkgrayareas(spots,s treaks,ormarks). ,dyedanodiccoatings,shallshownomorefadin gordiscolorationthanwouldbeequivalenttoa Delta(E)valueof3whensubjectedtothelightf astnessresistancetest( ),unlessotherwisespecifiedinthecontracto rpurchaseorder( ).Lightfastnessresistanceshallbedetermin edonlywhenspecifiedinthecontract,purchas eorderorapplicabledrawing( ).

9 , ,purchaseorderorapplicabledrawing( ). ,purchaseorder,orapplicabledrawing( ), (2roils)( , ).Unlessotherwisespecified,thethicknesso fthecoatingshallnotvarybymorethan* (2roils) (2roils)shallnotvarybymorethan* ( ) ( ). ( ). # ,unsealedType111coatingsshallprovideahar dabrasionresistantfinishasspecifiedherei n( ). ,of2percentorhigher( ). ,IC,II, ,16,IC,11,and115anodtccoatingsshallbecom pletelysealed,unlessotherwisespecifiedin thecontract,purchaseorderorapplicabledra wtng( ).Theyshallbesealed~ ,sealingshallbeaccomplishedbyImmersionin asealingmediumsuchasa5percentaqueoussolu tionofsodiumorpotassiumdtchromate( )for15minutesat9f.) Cto100 C(194 Fto212 F),Inboillngdeionizedwater,cobaltortalck elacetate,orothersuitablechemicalsolutto ns( ).

10 ,sealingshallbeaccomplishedafterdyeingby immersionInasealtngmedium, ( ),boilingdeionizedwater,duplexsealtngwit hhotaqueoussolutlorisofntclcelacetateand sodlwndlchromate( ), , ,suchasbollfngdelontzedwater,Inahotaqueo us5percentsodiumciichromatesolutlon,~nah otaqueoussolutfoncontainingn!ckelorcobal tacetateorothersuitablechemicalsolutlor? s( ).klhenTypeIIIcoatingsareprovidedunseale d,partsshallbethoroughlyrinsedincold, ( ).( ). , ,theyshallbecleanedinamannerthatwillnotb edetrimentaltotheanodiccoatingorthebasem etal( ). ( ). ,theappliedanodiccoatingshallbecontinuou s,smooth,adherent,uniforminappearance,fr eefrompowderyareas,loosefilms,breaks, ,componentscontainingcastandmachinedsurf aces,anddifferencesingrainsizewithinafor gingshallnotbecausetorejecttheanodiccoat ingunlessotherwisedspecifiedinthecontrac torpurchaseorder( ).