1、INOT MEASUREMENTSENSITIVE IMIL-A-8625F1-0September 1993SUPERSEDINGMIL-A-8625E,.,.,- 25Aprll 1988MILITARYSPECIFICATIONANOC)ICCOATINGS FOR ALUMINUM AND ALUMINUMALLOYS “This spec!ffcatlonIs approved for use by all Departmentsand Agencies of the Department of Defense.1. SCOPE1.1 Scope. This specificatio
2、ncovers the requirementsfor SIX types andtwo classesof electrolyticallyformed anodic coatingson aluminum andaluminumalloys for non-architecturalapplications(see 6.1).1.2 Classification. The anodic coating Typesand Classes covered by thisspecificationare as specified herein (see 6.2 and 6.21):1.2.1 T
3、ypesType I - Chromic acid anodizing, conventionalcoatings produced fromchromic acid bath (see 3.4.1)Type IB - Chromic acid anodizing, low voltage process, 22 2V,(see 3.4.1)Type IC - Non-chromicacid anodizing,for use as a non-chromatealternative for Type I and 16 coatings (see 3.4.1 and 6.1.2)Type II
4、 - Sulfuric acid anodizing, conventionalcoatings produced fromsulfurlcacid bath (see 3.4.2)Type 116 - Thin sulfuric acid anodizing,for use as a non-chromatealternativefor Type I and 16 coatings (see 3.4.2 and 6.1.2)Type III - Hard Anodc Coatings (see 3.4.3)1.2.2 Classes.:Class 1 - Non-dyed (see 3.5.
5、)Class 2 -Dyed (see 3.6.)Benefical comments(recommendations,additions,deletions) and anypertinentdata which may be of use In Improvingthis document should beaddressed to: Commanding Officer, Naval Alr Warfare Center AircraftDlvlsion Lakehurst,Code SR3, Lakehurst,NJ 08733-5100, by using theself-addre
6、ssedStandardlzatlonDocument ImprovementProposal (00 Form ?426)appearlnq at the end of this document or by letter.AMSC N/A AREA MFFPDISTRIBUTIONSTATEMENTA: Approved for public release; distribution Is unlimited.- . - - - - - .Provided by IHSNot for ResaleNo reproduction or networking permitted withou
7、t license from IHS-,-,-MIL-A-8625F2. APPLICABLEDOCUMENTS2.1 Government documents,2.1.1 Speciflcattonsand standards. The followlngspeclflcatlonsandstandardsform a part of this document to the extent speclfledherein. Unless uotherwise speclfled,the issuesof thesedocumentsare those lsted h theissue of
8、the I)epartmentof Defense Indexof Specificationsand Standards(0001SS) and supplementthereto, cited In the solicitation.SPECIFICATIONS.MILITARYMIL-P-23377 - PrimerCoating, Epoxy-Polyamide,Chemical and SolventResistantMIL-C-81706 - ChemicalConversionMaterialsfor Coating Alumlnum andAluminumAlloysMIL-P
9、-85582 - PrimerCoatings: Epoxy, WaterborneFEDERALQQ-A-250/4 - AluminumAlloy 2024, Plate and SheetSTANDARDSFEDERALFED-sTD-141 - Paint,Varnish, Lacquer,and RelatedMaterials: MethodsFor Sampltng and TestingFED-STD-151 - Metals; Test MethodsMILITARYMIL-STD-105 - SamplingProcedures and Tables For Inspect
10、onBy Attribute(Unlessotherulse Indicated,copies of federal and military specificationsandstandardsare available from DODSSP-CustomerService,StandardlzatlonDocumentsOrder Desk, 700 Robblns Avenue, Building 4D, Phlladelphla, PA 19111-5094.)2.2 Non-Governmentpublications. The followtng documentsform a
11、part ofthis-documentto the extent specified herein. Unless otherwise speclfled,thessuesof the documents which are DOD adopted are those llsted In the Issueofthe 0001SS cited In the solicitation. Unless otherwisespeclfled,the issuesof documentsnot llsted In the DODISSare the issuesof the documents ci
12、ted fnthe sollcltatlon(see 6.2).AMERICANSOCIETY FOR TESTINGAND MATERIALS (ASTH)ASTM B 117ANSI/ASTMB 137 =ASTM B 244 -ASTMD 822 -Method of Salt Spray (Fog) TestingHeight of Coatingon AnodcallyCoated Aluminum,MeasurefnentofThicknessof Anodic Coatings on Alumlnum and of OtherNonconductiveCoatingson Non
13、magneticBasis Metalswith Eddy Current Instruments,MeasurementofLight and Water ExposureApparatus (Carbon-ArcType)for Testing Paint,Varnish, Lacquerand RelatedProducts,StandardPractice for OperatingProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ML-A-
14、8625FASTMD 2244 - Color D“lfferencesof OpaquOflteralsi Instrumental.,.Evaluation of , JASTMG 23 - Standard Practice for Opera$g Light ExposureApparatus(Carbon-Aic Type) bllthandllfthoutWater for Exposure ofNon-metallic MaterialsASTMG26 - Operating Light-ExposureApparatus (Xenon-ArcType) Withand bllt
15、houtIlaterfor Exposureof Non-metalllcmaterials(Applicationfor copes should be addressed to the American Society forTesting and Materials, 1916 Race Street, Phlladelphla,PA 19103.) .32.3 Order of precedence. In the event of a conflictbetween the text ofthis document and the references cited herein, t
16、he text of this document takesprecedence. Nothing In this document, however, supersedesapplicable laws andregulatonsunless a speclflc exemption has been obtained.3. REQUIREMENTS3. Materials. The materials used shall be such as to produce coatingswhich meet the requirementsof this specification.3.1.1
17、 Base metal. The base metal shall be free from surface defects,causedby machining, cutting, scratching, polishlng,buffing, roughening,bending,stretching,deforming, rolling, sandblasting,vaporblastlng,etching,heat treatmentcondltlon,alloy chemtstry Imbalanceand inclusions,that willcause coated test p
18、anels or parts to fafl any of the requirementsof thisspecification. The base metal shall be subjectedto cleaning, etching,anodlzlngand seallng procedures as necessary to yteld coatings meeting allrequirementsof th!s specification.3.2 Equipmentand processes. The equipment and processes employed shall
19、be such as to produce coatings which meet the requirementsof thsspecification.-Unless otherwise specified In the contract,purchaseorder orapplicabledrawfng (see 6.2), process operating conditions shall be at theoption of the supplfer.3.3 General.3.3.1 Anodlztngof parts and assemblies.3.3.1.1 Anodlzl
20、ng of parts. Unless otherwise specified in the contract,purchaseortieror apJicable dr$u?fig(see6:2),parts shall be anodized after, ,al? heat treatment,.machining, e?dlr!g?formingand perforating have beencompleted. . !3.3.1.2 Anodzhd of assembies. Unlessotherwisespeclfled In thecontract,purchase”brde
21、ror applicable drawi%g, anodic coatings shall not beapplied to-assemblteswhtchwillentraptheelectrolyte In joints or recesses(componentsshall be anodized separately prior to assembly). Nhen anodlzlngof assemblies is authorized by the;coitactj purchase,orderor applicabledrawing,the proce,sslng,ffletod
22、usedsallnot result in subsequentdamage tothe assemblyfrom electrolyteentraprnent(Type I or”IA coatings shall be usedunless another coating Type Is specl,fied).Assemblieswhich containnon-aluminumparts such as steel, brass or organic substances,which would beattackedby pretreatmentor anodizing solutlo
23、nsor would prevent unformformationof the anodlc coating, shall not be anodizedas assemblies, unlessthe non-aluminumsurfaces are masked or electrically insulated In a mannerwhich produces anodlc coatings meeting the requirementsof this specification.3Provided by IHSNot for ResaleNo reproduction or ne
24、tworking permitted without license from IHS-,-,-MIL-A-8625F3.3.1.2 Anodtzlngof complex.shapes. Hhen anodizingcomplex shapeswhichuIII entrap the electrolytein recesses, the processingmethod used shall notresultin subsequentdamage to the part from electrolyteentrapment(Type I or1A coatingsshall be use
25、d unless another coating Type Is speclfled).3.3.2 Handllngand cleanlnq. Parts shall be so handledduring allpretreatment, anodizingand post treatments that mechanical damage orcontaminationwI1l be avoided. Parts shall be free of all forefgn substances,oxides and soils, such as greases, oIL pafnt and
26、welding flux.:“,.:y,:. MT1-3.OOCUMENT TiTLCa71MATTNC.S& NATURE OF CHANGE (kdtntlfypatagtaph nutntw and inducit proposed rewrite, if “ble. Attach a71flra $/wets as needed.).“ ,.d”S. RfA$ON FOR RtCOMMtNDAllON8. PRtPARltfG ACTIVIWa. !ECOFMAOING OFFICER, NAVAL AIR b. TELEPHONE(Mude tit Code)GFARE CENTER
27、 AIRCRAFT DIVISION LAKEHURST (1)Commercial (2) AUTOVONSYSTEMS REQUIREMENTS DEPARTMENT (908).323-7488 624-7488L ADOFKSSOchdezipC*)CODE SR3W YOU 00 NOT RECtlVt A REPLY WITHIN 45 OAY$, CONIA:Mfense Quality a71nd Standardization OfficeLAKEHURST, NJ 08733-5100 5203 Ltesburg Pike, Suite 1403, falls Church, VA 22041-M66 “Telephone (703) 7S&23a AUTOVON 289.2340Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
