ASTM B580 - 79(2009)

    Standard Specification for Anodic Oxide Coatings on Aluminum

    Active Standard ASTM B580 | Developed by Subcommittee: B08.07

    Book of Standards Volume: 02.05


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    Abstract

    This specification covers the requirements for porous oxide coatings deposited by electrolysis on aluminum and aluminum alloy parts. These coatings should have good appearance, abrasion resistance, electrical properties, and protection against corrosion and does not include nonporous barrier layer anodic coatings that are used for electrical capacitors. The basis metals for these coatings should be subjected to mechanical finishing operations, cleaning, and chemical or electrolytic pre-treatments to yield coatings with fine quality and appearance. Anodized parts should be sealed in water or aqueous chemical solutions except when otherwise specified. Each anodic coating should be continuous, smooth, adherent, uniform in appearance, and free of powdery areas (burns, loose films, stains, discolorations, and discontinuities.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers requirements for electrolytically formed porous oxide coatings on aluminum and aluminum alloy parts in which appearance, abrasion resistance, electrical properties, and protection against corrosion are important. Nonporous, barrier layer anodic coatings used for electrical capacitors are not covered. Seven types of coatings as shown in Table 1 are provided. Definitions and typical examples of service conditions are provided in Appendix X1.

    Note 1—It is recognized that uses exist in which modifications of the coatings covered by this specification may be required. In such cases the particular properties desired by the purchaser should be the subject of agreement between the purchaser and the manufacturer.

    1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    TABLE 1 Anodic Coatings Descriptions

    Note—Hard coatings may vary in thickness from 12 μm to more than 100 μm. If the thickness of Type A is not specified, it shall be 50 μm min. Type A coatings will not be sealed unless so specified.

    TypeCoating (Industry) DescriptionMinimum Film Thickness (μm)
    AEngineering Hard Coat50
    BArchitectural Class I18
    CArchitectural Class II10
    DAutomotiveExterior 8
    EInteriorModerate Abrasion 5.0
    FInteriorLimited Abrasion 3
    GChromic Acid 1


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    B110 Method for Testing Dielectric Strength of Anodically Coated Aluminum

    B117 Practice for Operating Salt Spray (Fog) Apparatus

    B136 Method for Measurement of Stain Resistance of Anodic Coatings on Aluminum

    B137 Test Method for Measurement of Coating Mass Per Unit Area on Anodically Coated Aluminum

    B244 Test Method for Measurement of Thickness of Anodic Coatings on Aluminum and of Other Nonconductive Coatings on Nonmagnetic Basis Metals with Eddy-Current Instruments

    B368 Test Method for Copper-Accelerated Acetic Acid-Salt Spray (Fog) Testing (CASS Test)

    B457 Test Method for Measurement of Impedance of Anodic Coatings on Aluminum

    B487 Test Method for Measurement of Metal and Oxide Coating Thickness by Microscopical Examination of Cross Section

    B538 Method of FACT (Ford Anodized Aluminum Corrosion Test)

    B602 Test Method for Attribute Sampling of Metallic and Inorganic Coatings

    D658 Test Method for Abrasion Resistance of Organic Coatings by Air Blast Abrasive

    E429 Test Method for Measurement and Calculation of Reflecting Characteristics of Metallic Surfaces Using Integrating Sphere Instruments

    E430 Test Methods for Measurement of Gloss of High-Gloss Surfaces by Abridged Goniophotometry

    Other Standards

    MIL-STD-414 Sampling Procedures and Tables for Inspection by Variables for Percent Defective


    ICS Code

    ICS Number Code 25.220.20 (Surface treatment)

    UNSPSC Code

    UNSPSC Code


    Referencing This Standard

    DOI: 10.1520/B0580-79R09

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM B580-79(2009), Standard Specification for Anodic Oxide Coatings on Aluminum, ASTM International, West Conshohocken, PA, 2009, www.astm.org

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