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ASTM B580-79(2004)

(Specification)

Standard Specification for Anodic Oxide Coatings on Aluminum

Standard Specification for Anodic Oxide Coatings on Aluminum

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.
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 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.

General Information

Status
Historical
Publication Date
30-Sep-2004
ICS
25.220.20 - Surface treatment
Technical Committee
B08 - Metallic and Inorganic Coatings
Drafting Committee
B08.07 - Conversion Coatings
Current Stage
Ref Project

Relations

Replaces
ASTM B580-79(2000) - Standard Specification for Anodic Oxide Coatings on Aluminum
Effective Date
01-Oct-2004
Replaced By
ASTM B580-79(2009) - Standard Specification for Anodic Oxide Coatings on Aluminum
Effective Date
15-Apr-2009
Referred By
ASTM F993-21 - Standard Specification for Valve Locking Devices
Effective Date
01-Oct-2004
Referred By
ASTM F1476-07(2019) - Standard Specification for Performance of Gasketed Mechanical Couplings for Use in Piping Applications
Effective Date
01-Oct-2004
Referred By
ASTM F992-17(2022) - Standard Specification for Valve Label Plates
Effective Date
01-Oct-2004
Referred By
ASTM F1548-01(2023) - Standard Specification for Performance of Fittings for Use with Gasketed Mechanical Couplings Used in Piping Applications
Effective Date
01-Oct-2004
Referred By
ASTM G103-97(2023)e1 - Standard Practice for Evaluating Stress-Corrosion Cracking Resistance of Low Copper 7XXX Series Al-Zn-Mg-Cu Alloys in Boiling 6 % Sodium Chloride Solution
Effective Date
01-Oct-2004

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ASTM B580-79(2004) - Standard Specification for Anodic Oxide Coatings on AluminumASTM B580-79(2004) - Standard Specification for Anodic Oxide Coatings on Aluminum
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ASTM B580-79(2004) - Standard Specification for Anodic Oxide Coatings on Aluminum
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B 580 – 79 (Reapproved 2004)
Standard Specification for
Anodic Oxide Coatings on Aluminum
This standard is issued under the fixed designation B 580; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript 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.
TABLE 1 Anodic Coatings Descriptions
1. Scope
1.1 This specification covers requirements for electrolyti- NOTE 1—Hardcoatingsmayvaryinthicknessfrom12µmtomorethan
100 µm. If the thickness of TypeAis not specified, it shall be 50 µm min.
cally formed porous oxide coatings on aluminum and alumi-
Type A coatings will not be sealed unless so specified.
num alloy parts in which appearance, abrasion resistance,
Type Coating (Industry) Description Minimum Film Thickness (µm)
electrical properties, and protection against corrosion are
important. Nonporous, barrier layer anodic coatings used for A Engineering Hard Coat 50
B Architectural Class I 18
electricalcapacitorsarenotcovered.Seventypesofcoatingsas
C Architectural Class II 10
shown in Table 1 are provided. Definitions and typical ex-
D Automotive—Exterior 8
amples of service conditions are provided in Appendix X1. E Interior—Moderate Abrasion 5.0
F Interior—Limited Abrasion 3
NOTE 1—It is recognized that uses exist in which modifications of the
G Chromic Acid 1
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.
Coating Thicknesses by Microscopical Examination of a
2. Referenced Documents
Cross Section
2.1 ASTM Standards:
B 538 Method of FACT (Ford Anodized Aluminum Corro-
B 110 Test Method for Dielectric Strength of Anodically 3
sion Test)
Coated Aluminum
B 602 Test Method for Attribute Sampling of Metallic and
B 117 Practice for Operating Salt Spray (Fog) Testing
Inorganic Coatings
Apparatus
D 658 Test Method for Abrasion Resistance of Organic
B 136 Test Method for Measurement of Stain Resistance of 3
Coatings by Air Blast Abrasive
Anodic Coatings on Aluminum
E 429 Test Method for Measurement and Calculation of
B 137 Test Method for Measurement of Coating Mass per
Reflecting Characteristics of Metallic Surfaces Using Inte-
Unit Area on Anodically Coated Aluminum 3
grating Sphere Instruments
B 244 Test Method for Measurement of Thickness of An-
E 430 Test Methods for Measurement of Gloss of High-
odic Coatings on Aluminum and of Other Nonconductive 3
Gloss Surfaces by Goniophotometry
CoatingsonNonmagneticBasisMetalswithEddy-Current
2.2 Other Standards:
Instruments
MIL-STD-105 Sampling Procedures and Tables for Inspec-
B 368 Test Method for Copper-Accelerated Acetic Acid-
tion by Attributes
Salt Spray (Fog) Testing (CASS Test)
MIL-STD-414 Sampling Procedures and Tables for Inspec-
B 457 Test Method for Measurement of Impedance of
tion by Variables for Percent Defective
Anodic Coatings on Aluminum
B 487 Test Method for Measurement of Metal and Oxide 3. Manufacture
3.1 Defects in the surface of the basis metal, such as
scratches, porosity, inclusions, roll and die marks, cold shuts,
and cracks, will adversely affect the appearance and perfor-
This specification is under the jurisdiction of ASTM Committee B08 on
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
mance of applied coatings despite the observance of best
B08.07 on Chromate Conversion Coatings.
anodizing practices. Accordingly, defects in the coating that
Current edition approved Oct. 1, 2004. Published October 2004. Originally
result from such conditions shall not be cause for rejection.
approved in 1973. Last previous edition approved in 2000 as B 580 – 79 (2000).
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Withdrawn. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 580 – 79 (2004)
NOTE 2—To minimize problems of this sort, the specifications covering
have all of these characteristics. Therefore, the quality assur-
the basis material or the item to be anodized should contain appropriate
ance requirements for a given coating should be selected to
limitations on such basis metal conditions.
control those properties necessary to the expected end use for
3.2 The basis metal shall be subjected to such mechanical
the product.
finishing operations, cleaning, and chemical or electrolytic
6.2 Anodic coatings supplied under this specification shall
pre-treatments as are necessary to yield anodic coatings with
meet the minimum requirements for film thickness as stated in
the final quality and appearance specified by the purchaser.
Table 1.
3.3 Exceptwherespecificallyexcluded,anodizedpartsshall
6.3 The following ASTM test methods are applicable to
be sealed in water or aqueous chemical solutions of such
anodic coatings within the scope of this specification: B 110,
purity, composition, pH, and temperature, as to impart the
B 117, B 136, B 137, B 244, B 368, B 457, B 487, B 538,
properties specified herein.
D 658, E 429, and E 430. The selection of tests to be required
and the level of performance against each test, with the
4. Significant Surfaces
exception of minimum film thickness, shall be subject to
4.1 Significant surfaces are defined as those normally vis-
agreementbetweenpurchaserandmanufacturer.TheDyeSt
...

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ABSTRACT
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This specification covers measurement of strain resistance of anodic coatings on aluminium and its alloys, that have undergone a sealing treatment and contact with an acidic solution, are stainproof or nonadsorptive with respect to dyes. The method comprises contacting the test area of the anodized specimen with nitric acid solution and, after rinsing and drying, applying a special dye solution followed by rinsing and rubbing the test area with pumice powder, drying, and visual examination of the test area for retention of dye stain. Coatings that exhibit no dye stain or change in color are considered to have passed the test. Reagent grade chemicals shall be used in all tests. A specified solution of nitric acid shall be prepared in distilled or deionized water. A specified volume of aluminium blue 2WL dye shall be dissolved in distilled or deionized water.
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SCOPE
1.1 This specification covers requirements for electrolytically formed oxide coatings on magnesium and magnesium alloy parts where appearance, abrasion resistance, and protection against corrosion are important.  
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