ASTM_B_580_-_79_2014.pdf

Designation:B58079(Reapproved 2014)Standard Specification forAnodic Oxide Coatings on Aluminum1This standard is issued under the fixed designation B580;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers requirements for electrolyti-cally formed porous oxide coatings on aluminum and alumi-num alloy parts in which appearance,abrasion resistance,electrical properties,and protection against corrosion areimportant.Nonporous,barrier layer anodic coatings used forelectrical capacitors are not covered.Seven types of coatings asshown in Table 1 are provided.Definitions and typical ex-amples of service conditions are provided in Appendix X1.NOTE1It is recognized that uses exist in which modifications of thecoatings covered by this specification may be required.In such cases theparticular properties desired by the purchaser should be the subject ofagreement between the purchaser and the manufacturer.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.2.Referenced Documents2.1 ASTM Standards:2B110 Method for Testing Dielectric Strength of AnodicallyCoated Aluminum(Withdrawn 1982)3B117 Practice for Operating Salt Spray(Fog)ApparatusB136 Method for Measurement of Stain Resistance of An-odic Coatings on AluminumB137 Test Method for Measurement of Coating Mass PerUnit Area on Anodically Coated AluminumB244 Test Method for Measurement of Thickness of AnodicCoatings on Aluminum and of Other NonconductiveCoatings on Nonmagnetic Basis Metals with Eddy-Current InstrumentsB368 Test Method for Copper-Accelerated Acetic Acid-SaltSpray(Fog)Testing(CASS Test)B457 Test Method for Measurement of Impedance of An-odic Coatings on AluminumB487 Test Method for Measurement of Metal and OxideCoating Thickness by Microscopical Examination ofCross SectionB538 Method of FACT(Ford Anodized Aluminum Corro-sion Test)(Withdrawn 1986)3B602 Test Method for Attribute Sampling of Metallic andInorganic CoatingsD658 Test Method for Abrasion Resistance of OrganicCoatings by Air Blast Abrasive(Withdrawn 1996)3E429 Test Method for Measurement and Calculation ofReflecting Characteristics of Metallic Surfaces UsingIntegrating Sphere Instruments(Withdrawn 1996)3E430 Test Methods for Measurement of Gloss of High-GlossSurfaces by Abridged Goniophotometry2.2 Other Standards:MIL-STD-105 Sampling Procedures and Tables for Inspec-tion by Attributes4MIL-STD-414 Sampling Procedures and Tables for Inspec-tion by Variables for Percent Defective43.Manufacture3.1 Defects in the surface of the basis metal,such asscratches,porosity,inclusions,roll and die marks,cold shuts,and cracks,will adversely affect the appearance and perfor-mance of applied coatings despite the observance of bestanodizing practices.Accordingly,defects in the coating thatresult from such conditions shall not be cause for rejection.NOTE2To minimize problems of this sort,the specifications coveringthe basis material or the item to be anodized should contain appropriatelimitations on such basis metal conditions.3.2 The basis metal shall be subjected to such mechanicalfinishing operations,cleaning,and chemical or electrolyticpre-treatments as are necessary to yield anodic coatings withthe final quality and appearance specified by the purchaser.3.3 Except where specifically excluded,anodized parts shallbe sealed in water or aqueous chemical solutions of such1This specification is under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatings and is the direct responsibility of SubcommitteeB08.07 on Conversion Coatings.Current edition approved Nov.1,2014.Published November 2014.Originallyapproved in 1973.Last previous edition approved in 2009 as B580 79(2009).DOI:10.1520/B0580-79R14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 purity,composition,pH,and temperature,as to impart theproperties specified herein.4.Significant Surfaces4.1 Significant surfaces are defined as those normally vis-ible(directly or by reflection)which are essential to theappearance of serviceability of the article when assembled innormal position;or those surfaces which can be the source ofcorros