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ASTM B580-79(2009)

(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 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 DAutomotive—Exterior 8 EInterior—Moderate Abrasion 5.0 FInterior—Limited Abrasion 3 GChromic Acid 1

General Information

Status
Historical
Publication Date
14-Apr-2009
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(2004) - Standard Specification for Anodic Oxide Coatings on Aluminum
Effective Date
15-Apr-2009
Replaced By
ASTM B580-79(2014) - Standard Specification for Anodic Oxide Coatings on Aluminum
Effective Date
01-Nov-2014
Referred By
ASTM F1476-07(2019) - Standard Specification for Performance of Gasketed Mechanical Couplings for Use in Piping Applications
Effective Date
15-Apr-2009
Referred By
ASTM F1548-01(2023) - Standard Specification for Performance of Fittings for Use with Gasketed Mechanical Couplings Used in Piping Applications
Effective Date
15-Apr-2009
Referred By
ASTM F992-17(2022) - Standard Specification for Valve Label Plates
Effective Date
15-Apr-2009
Referred By
ASTM F993-21 - Standard Specification for Valve Locking Devices
Effective Date
15-Apr-2009
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
15-Apr-2009

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ASTM B580-79(2009) - Standard Specification for Anodic Oxide Coatings on AluminumASTM B580-79(2009) - Standard Specification for Anodic Oxide Coatings on Aluminum
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ASTM B580-79(2009) - 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:B580 −79(Reapproved2009)
Standard Specification for
Anodic Oxide Coatings on Aluminum
This standard is issued under the fixed designation B580; 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 (´) 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. Scope Spray (Fog) Testing (CASS Test)
B457 Test Method for Measurement of Impedance of An-
1.1 This specification covers requirements for electrolyti-
odic Coatings on Aluminum
cally formed porous oxide coatings on aluminum and alumi-
B487 Test Method for Measurement of Metal and Oxide
num alloy parts in which appearance, abrasion resistance,
Coating Thickness by Microscopical Examination of
electrical properties, and protection against corrosion are
Cross Section
important. Nonporous, barrier layer anodic coatings used for
B538 Method of FACT (Ford Anodized Aluminum Corro-
electricalcapacitorsarenotcovered.Seventypesofcoatingsas
sion Test) (Withdrawn 1986)
shown in Table 1 are provided. Definitions and typical ex-
B602 Test Method for Attribute Sampling of Metallic and
amples of service conditions are provided in Appendix X1.
Inorganic Coatings
NOTE 1—It is recognized that uses exist in which modifications of the
D658 Test Method for Abrasion Resistance of Organic
coatings covered by this specification may be required. In such cases the 3
Coatings by Air Blast Abrasive (Withdrawn 1996)
particular properties desired by the purchaser should be the subject of
E429 Test Method for Measurement and Calculation of
agreement between the purchaser and the manufacturer.
Reflecting Characteristics of Metallic Surfaces Using
1.2 The values stated in SI units are to be regarded as
Integrating Sphere Instruments (Withdrawn 1996)
standard. No other units of measurement are included in this
E430 TestMethodsforMeasurementofGlossofHigh-Gloss
standard.
Surfaces by Abridged Goniophotometry
2.2 Other Standards:
2. Referenced Documents
MIL-STD-105 Sampling Procedures and Tables for Inspec-
2.1 ASTM Standards: 4
tion by Attributes
B110 Method for Testing Dielectric Strength of Anodically
MIL-STD-414 Sampling Procedures and Tables for Inspec-
Coated Aluminum (Withdrawn 1982) 4
tion by Variables for Percent Defective
B117 Practice for Operating Salt Spray (Fog) Apparatus
B136 Method for Measurement of Stain Resistance of An-
3. Manufacture
odic Coatings on Aluminum
3.1 Defects in the surface of the basis metal, such as
B137 Test Method for Measurement of Coating Mass Per
scratches, porosity, inclusions, roll and die marks, cold shuts,
Unit Area on Anodically Coated Aluminum
and cracks, will adversely affect the appearance and perfor-
B244 Test Method for Measurement of Thickness ofAnodic
mance of applied coatings despite the observance of best
Coatings on Aluminum and of Other Nonconductive
anodizing practices. Accordingly, defects in the coating that
Coatings on Nonmagnetic Basis Metals with Eddy-
result from such conditions shall not be cause for rejection.
Current Instruments
NOTE 2—To minimize problems of this sort, the specifications covering
B368 Test Method for Copper-Accelerated Acetic Acid-Salt
the basis material or the item to be anodized should contain appropriate
limitations on such basis metal conditions.
This specification is under the jurisdiction of ASTM Committee B08 on
3.2 The basis metal shall be subjected to such mechanical
Metallic and Inorganic Coatingsand is the direct responsibility of Subcommittee
finishing operations, cleaning, and chemical or electrolytic
B08.07 on Conversion Coatings.
pre-treatments as are necessary to yield anodic coatings with
Current edition approved April 15, 2009. Published June 2009. Originally
the final quality and appearance specified by the purchaser.
approved in 1973. Last previous edition approved in 2004 as B580 – 79 (2004).
DOI: 10.1520/B0580-79R09.
3.3 Exceptwherespecificallyexcluded,anodizedpartsshall
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
be sealed in water or aqueous chemical solutions of such
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.
3 4
The last approved version of this historical standard is referenced on AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
www.astm.org. 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
B580−79(2009)
TABLE 1 Anodic Coatings Descriptions
6. Quality Assurance
NOTE 1—Hard coatings may vary in thickness from 12 µm to more than 6.1 Anodic oxide coatings can be produced to have many
100 µm. If the thickness of TypeAis not specified, it shall be 50 µm min.
different characteristics. No single coating can be expected to
Type A coatings will not be sealed unless so specified.
have all of these characteristics. Therefore, the quality assur-
Type Coating (Industry) Description Minimum Film Thickness (µm)
ance requirements for a given coating should be selected to
A Engineering Hard Coat 50
control those properties necessary to the expected end use for
B Architectural Class I 18
C Architectural Class II 10 the product.
D Automotive—Exterior 8
6.2 Anodic coatings supplied under this specification shall
E Interior—Moderate Abrasion 5.0
F Interior—Limited Abrasion 3 meet the minimum requirements for film thickness as stated in
G Chromic Acid 1
Table 1.
6.3 The following ASTM test methods are applicable to
anodic coatings within the scope of this specification: B110,
B117, B136, B137, B244, B368, B457, B487, B538, D658,
purity, composition, pH, and temperature, as to impart the
E429, and E430. The selection of tests to be required and the
properties specified herein.
level of performance against
...

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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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1.5.4 Anodic coatings that have undergone a treatment to render them hydrophobic.  
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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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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