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:(hmnandlngOfficer,NavalAlrW arfareCenterAircraftOivtslonLakehurst,Co deSR3,Lakehurst,NJ08733-5100,byusingthes elf-addressedStandardizationOocumentImpr ovementProposal(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;TestMethodsMILITARYMIL-STD-105-Sa mplingProceduresandTablesForInspectionBy Attribute(Unlessotherwiseindicated,copie soffederalandmilitaryspecificationsandst andardsareavailablefromDODSSP-CustomerSe rvice,StandardizationDocumentsOrderDesk, 700 RobbinsAvenue,Building40,Philadelphia,PA 19111-5094.)

2 ( ).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)forTestingPaint,Varnish,L acquerandRelatedProducts,StandardPractic eforOperating2 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.)

3 ~ctbetweenthetextofthisdocumentandtheref erencescitedherein, ,however, ,causedbymachining,cutting,scratching,po lishing,buffing,roughening,bending,stret ching,deforming,rolling,sandblasting,vap orblasting,etching,heattreatmentconditio n,alloychemtstry!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).

4 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( ). (mechanicaldamageandcontactmarks).Unless otherwisespecified( ), ,touchUPshallonlybeallowedinareaswhichwi llnotbesubjectedtoabrasion( ).

5 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{ ). ~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).}

6 ,dyedanodiccoatings,shallshownomorefadin gordiscolorationthanwouldbeequivalenttoa Delta(E)valueof3whensubjectedtothelightf astnessresistancetest( ),unlessotherwisespecifiedinthecontracto rpurchaseorder( ).Lightfastnessresistanceshallbedetermin edonlywhenspecifiedinthecontract,purchas eorderorapplicabledrawing( ). , ,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.

7 Cto100 C(194 Fto212 F),Inboillngdeionizedwater,cobaltortalck elacetate,orothersuitablechemicalsolutto ns( ). ,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( ).

8 ( ).Ifaspecificlocationforcontactmarksisde sired,thelocationshallbespecifiedontheco ntractorpurchaseorder( ). ,thecontractorisresponsiblefortheperform anceofallinspectionrequirements(examinat ionsandtests) ,thecontractormayusehisownoranyotherfaci litiessuitablefortheperformanceoftheinsp ectionrequirementsspecifiedherein, ,aspartofmanufacturingoperations,isanacc eptablepracticetoascertainconformancetor equirements,however,thisdoesnotauthorize submissionofknowndefectivematerial,eithe rindicatedoractual, ( ). ( ). (PCO).Theanodtzershalldevelop,maintain, , ( ) ,currentdensityandanodizingtime(orvoltag erampsandholdtimes) ( ).Solutionanalystsshallbeperformedatleas tonceeverytwoweeksunlessotherwisespecifi edbytheprocur~ , ,suchrecords,aswellasreportsofthetestres ults, ~nuouscontroloftheprocess, , , Coating1,16,lC,II, ~ ,1,16,IC,11, (mllntmum)LIghtI,IB,IC,11, , ~/ForType111coatings,thecoatingweightmay bechoseninlieuofthecoatingthicknessatthe optionoftheprocuringactivity( ).

9 ; theoptionofthesupplier,testpanelsshaljbe composedofeither2024-T3perQQ-A-250 , ( ).Whens~ecimenpanels ..Iftheprocuringactivitychoosestohavecoa tingweighttestedinlieuofthecoatingthickn essforTypeIIIhardanodizedcoatings, , ~6*C(200 ~10 F) ,thetestspecimensshallbestrippedbyimmers ioninaphosphoric-chromicacidsolutionfora minimumof5minutes,(nottoexceed6 minutes),at100 ~60C(212 Z10 F).Thesolutionshallconsistofthefollowing :Phosphoricacid,85percent35millilitersCh romicacid(Cr03)20gramsWatertomake1, ,washedindistilledwater,dried, ,whichisIndicatedbythespecimen , , ,shallbewashedindistilledordeionizedwate r,driedwithasoftclothandthensubjectedtoa 5percentsaltspraytestinaccordancewithAST MB117, , (Class2only).Testspecimens, ,shallbetestedforlightfastnessresistance byexposuretoultravioletradiationinaccord ancewitheitherASTMG23,ASTMD8220rASTMG26, foraperiodof200hours, ,specimensshallbecomparedwithduplicatesp ecimensnotexposedtoalightsourceforthesam eperiodoftimetodeterminetheDelta(E) (E) , , (RPM)for10, , , ( ), (Notapplicabletothisspecification) (Thissectionconta!)

10 NsInformationofageneralorexplanatorynatu rethatmaybehelpfulbuttsnotmandatory) , , , , ( ) ,TypeIand18coatings( )areusedduetothethinnessofthecoating( ). ,paintadhesion, ( ).MaximumTypeICandTypeIIBcoatingweightso f700mg/ft2and1000mg/ft2,respectively,are specifiedinTableIforfatiguepurposes( ).IfhigherTypeICcoatingweightsarepermiss iblefortheIntendeduse,Itshouldbespecifie dinthecontractorpurchaseorder( ).IfhigherTypelIBcoatingweightsarepermis sibleforthetntendeduse, , ~ , ,slidingparts,hingemechanisms,cams,gears ,swiveljoints,pistons,rocketnozzlesjinsu lationplates,blastshields, , ( ( ~ecialDrocessoDerat~nqconditions,ifamlic able (see3:2). ~icationrequirements( , , ). ,ifapplicable( }. ( ). ,ifapplicable,andaDeltaEvalueifdifferent than3( ). ,inapplicable( ). ,TypeIII,ifsubstituted( ). ( ). ,theallowabledifferenceinanodiccoatingap pearanceresultingfrominherentbasemetaldi fferences( ). ( ). ( ).))