1、Designation: B 580 79 (Reapproved 2004)Standard Specification forAnodic Oxide Coatings on Aluminum1This standard is issued under the fixed designation B 580; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision
2、. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers requirements for electr
3、olyti-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 coating
4、s asshown in Table 1 are provided. Definitions and typical ex-amples of service conditions are provided in Appendix X1.NOTE 1It 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 pur
5、chaser should be the subject ofagreement between the purchaser and the manufacturer.2. Referenced Documents2.1 ASTM Standards:2B 110 Test Method for Dielectric Strength of AnodicallyCoated Aluminum3B 117 Practice for Operating Salt Spray (Fog) TestingApparatusB 136 Test Method for Measurement of Sta
6、in Resistance ofAnodic Coatings on AluminumB 137 Test Method for Measurement of Coating Mass perUnit Area on Anodically Coated AluminumB 244 Test Method for Measurement of Thickness of An-odic Coatings on Aluminum and of Other NonconductiveCoatings on Nonmagnetic Basis Metals with Eddy-CurrentInstru
7、mentsB 368 Test Method for Copper-Accelerated Acetic Acid-Salt Spray (Fog) Testing (CASS Test)B 457 Test Method for Measurement of Impedance ofAnodic Coatings on AluminumB 487 Test Method for Measurement of Metal and OxideCoating Thicknesses by Microscopical Examination of aCross SectionB 538 Method
8、 of FACT (Ford Anodized Aluminum Corro-sion Test)3B 602 Test Method for Attribute Sampling of Metallic andInorganic CoatingsD 658 Test Method for Abrasion Resistance of OrganicCoatings by Air Blast Abrasive3E 429 Test Method for Measurement and Calculation ofReflecting Characteristics of Metallic Su
9、rfaces Using Inte-grating Sphere Instruments3E 430 Test Methods for Measurement of Gloss of High-Gloss Surfaces by Goniophotometry32.2 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
10、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,
11、defects in the coating thatresult from such conditions shall not be cause for rejection.1This specification is under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatings and is the direct responsibility of SubcommitteeB08.07 on Chromate Conversion Coatings.Current edition approve
12、d Oct. 1, 2004. Published October 2004. Originallyapproved in 1973. Last previous edition approved in 2000 as B 580 79 (2000).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,
13、 refer to the standards Document Summary page onthe ASTM website.3Withdrawn.4Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.TABLE 1 Anodic Coatings DescriptionsNOTE 1Hard coatings may vary in thickness from 12 m to mo
14、re than100 m. If the thickness of Type A is not specified, it shall be 50 m min.Type A coatings will not be sealed unless so specified.Type Coating (Industry) Description Minimum Film Thickness (m)A Engineering Hard Coat 50B Architectural Class I 18C Architectural Class II 10D AutomotiveExterior 8E
15、InteriorModerate Abrasion 5.0F InteriorLimited Abrasion 3G Chromic Acid 11Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 2To minimize problems of this sort, the specifications coveringthe basis material or the item to be anodize
16、d 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 p
17、urchaser.3.3 Except where specifically excluded, anodized parts shallbe sealed in water or aqueous chemical solutions of suchpurity, composition, pH, and temperature, as to impart theproperties specified herein.4. Significant Surfaces4.1 Significant surfaces are defined as those normally vis-ible (d
18、irectly 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 ofcorrosion products that will deface visible surfaces and inter-fere with functional surfaces on the assembled article. Whennec
19、essary, the significant surfaces shall be the subject ofagreement between purchaser and manufacturer and shall beindicated on the drawings of the parts, or by the provision ofsuitably marked samples.NOTE 3When significant surfaces are involved on which the specifiedthickness or density of the coatin
20、g cannot readily be controlled, such asthreads, holes, deep recesses, and similar areas, the purchaser and themanufacturer should recognize the necessity for either thicker films on themore accessible surfaces or for special racking.5. Manner of Specifying Requirements5.1 Coating DescriptionWhen ord
21、ering articles to befinished in accordance with this specification, the purchasershall state:5.1.1 The ASTM designation number,5.1.2 The coating type and description (see Table 1),5.1.3 The minimum anodic film thickness,5.1.4 Special post anodic treatments,5.1.5 Applicable quality assurance requirem
22、ents (see Sec-tion 6),5.1.6 Significant surface appearance requirements such ascolor, texture, or reflectivity, and5.1.7 The alloy to which the coating is to be applied.5.2 Supplementary CoatingAny supplementary coatingthat is required in addition to normal or special sealing musteither be described
23、 in detail along with its requirements or theappropriate specification(s) must be referenced.6. Quality Assurance6.1 Anodic oxide coatings can be produced to have manydifferent characteristics. No single coating can be expected tohave all of these characteristics. Therefore, the quality assur-ance r
24、equirements for a given coating should be selected tocontrol those properties necessary to the expected end use forthe product.6.2 Anodic coatings supplied under this specification shallmeet the minimum requirements for film thickness as stated inTable 1.6.3 The following ASTM test methods are appli
25、cable toanodic coatings within the scope of this specification: B 110,B 117, B 136, B 137, B 244, B 368, B 457, B 487, B 538,D 658, E 429, and E 430. The selection of tests to be requiredand the level of performance against each test, with theexception of minimum film thickness, shall be subject toa
26、greement between purchaser and manufacturer. The Dye StainTest, as described in Test Method B 136, shall not be requiredfor Type G coatings or for Types B through F coatings sealedonly in dichromate solutions, or for unsealed Type A coatings.7. Workmanship and Appearance7.1 WorkmanshipThe anodic coa
27、tings shall be continu-ous, smooth, adherent, uniform in appearance, and shall be freeof powdery areas (burns), loose films, stains, discolorations,and discontinuities such as pits, breaks and scratches, or otherdamage. The size and number of contact marks shall be theminimum consistent with good pr
28、actice. The location ofcontact marks shall be in areas of minimum exposure to serviceenvironmental conditions when important to the function of thepart.7.2 AppearanceIf applicable, the color and finish appear-ance (bright, dull, or satin) shall be a reasonably closeapproximation to that of a sample
29、consisting of treated piecesagreed upon as the standard range by the manufacturer and thepurchaser.NOTE 4This range, representing the limits that the manufacturer willsupply and that the purchaser will accept, should be established before anywork is performed to meet this specification.8. Sampling8.
30、1 Test methods are time consuming and often destructive;therefore 100 % inspection is usually impractical. The pur-chaser should select a suitable sampling plan for the acceptancetesting of lots of coated items. In order that the manufacturermay know the quality standard he is expected to meet, the
31、planselected should be made a part of the purchase contract.8.2 Information on sampling procedures is given in TestMethod B 602. Standard sampling plans are suggested inMilitary Standards MIL-STD-105 and MIL-STD-414.B 580 79 (2004)2APPENDIX(Nonmandatory Information)X1. DEFINITIONS AND TYPICAL EXAMPL
32、ES OF SERVICE CONDITIONSTABLE X1.1 Definitions of Service Conditions and Examples of Typical Applications and Applicable Coating TypesSC No. Definition Typical ApplicationsApplicableCoatingTypesVery severe (5) Exposure to atmospheric weathering that can be expectedto extend for many years or to prol
33、onged high bearing loadwear conditions.Unmaintained exterior architectural facades, machineryparts, marineA and BSevere (4) Exposure that includes likely damage from denting,scratching, and abrasive wear coupled with corrosiveenvironments.1-Automotiveexterior, 2-maintained architecturalexteriorfacad
34、es, windowsC and DModerate (3) Exposure that is likely to include occasional wetting withcoating subject to moderate wear or abrasion.Lighting reflectorsexterior, athletic equipment,appliances, nameplates, lawn furnitureEMild (2) Exposure indoors in normally dry atmospheres with coatingsubject to mi
35、nimum wear or abrasion.Automotiveinterior, houseware items, lightingreflectorsenclosedFCrevice condition (1) Exposure to humid atmospheres with little or no abrasivecondition. Particularly for lap joints.Spot-welded or riveted assemblies such as aircraft andelectronic components.GASTM International
36、takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own
37、 responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be add
38、ressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at
39、 the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).B 580 79 (2004)3
