ASTM B580-79(2019)
(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.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
- Status
- Published
- Publication Date
- 31-Mar-2019
- Technical Committee
- B08 - Metallic and Inorganic Coatings
- Drafting Committee
- B08.07 - Conversion Coatings
Relations
- Effective Date
- 01-Apr-2019
- Effective Date
- 01-May-2013
- Effective Date
- 01-Oct-2011
- Effective Date
- 01-Jun-2011
- Refers
ASTM B602-88(2010) - Standard Test Method for Attribute Sampling of Metallic and Inorganic Coatings - Effective Date
- 01-Apr-2010
- Effective Date
- 01-Jul-2009
- Effective Date
- 15-Apr-2009
- Effective Date
- 15-Apr-2009
- Effective Date
- 15-Apr-2009
- Effective Date
- 01-Apr-2008
- Effective Date
- 01-Apr-2008
- Effective Date
- 15-Dec-2007
- Effective Date
- 01-Mar-2007
- Effective Date
- 01-Mar-2007
- Effective Date
- 01-Jun-2005
Overview
ASTM B580-79(2019), Standard Specification for Anodic Oxide Coatings on Aluminum, establishes requirements for producing porous oxide coatings on aluminum and aluminum alloy parts using electrolytic processes. Developed by ASTM International, this standard ensures that anodic oxide coatings exhibit excellent appearance, abrasion resistance, electrical properties, and protection against corrosion. It is widely recognized and utilized to guide quality assurance and product performance for anodizing aluminum in multiple industries.
This specification excludes nonporous barrier layer coatings used for electrical capacitors and focuses on anodized coatings that are continuous, smooth, adherent, uniform in appearance, and free from defects like powdery areas, burns, stains, and discontinuities. The standard applies only to SI units and was developed following international best practices for standardization.
Key Topics
Applicable Coating Types: ASTM B580 defines seven specific types of anodic coatings based on end-use requirements, including engineering hard coats, architectural classes, and coatings for automotive, interior, and specialized crevice conditions.
- Type A: Engineering Hard Coat
- Type B: Architectural Class I
- Type C: Architectural Class II
- Type D: Automotive - Exterior
- Type E: Interior - Moderate Abrasion
- Type F: Interior - Limited Abrasion
- Type G: Chromic Acid (Crevice)
Surface Preparation: The base aluminum must undergo mechanical finishing, thorough cleaning, and chemical or electrolytic pre-treatments to ensure high-quality, defect-free coatings.
Sealing: Anodized parts are typically sealed in water or aqueous chemical solutions unless otherwise specified. Sealing enhances corrosion resistance and overall coating durability.
Quality Assurance and Inspection:
- The standard specifies minimum film thickness for each coating type.
- Various referenced ASTM test methods address properties like thickness, abrasion resistance, corrosion protection, and appearance.
- Workmanship requirements ensure coatings are free from visual and structural defects.
Significant Surfaces: Surfaces critical to appearance or function must be identified and agreed upon between purchaser and manufacturer, especially when coating uniformity is challenging.
Ordering Requirements: Purchasers must specify coating type, minimum thickness, post-treatments, quality requirements, surface appearance, and the alloy to be anodized.
Applications
ASTM B580 anodic oxide coatings are vital for aluminum components in diverse sectors, offering enhanced corrosion resistance, electrical properties, and durability in demanding environments. Typical applications include:
- Architectural components: Windows, facades, exterior and interior building elements, especially in unmaintained or maintained exposures
- Automotive parts: Both exterior (higher corrosion and abrasion resistance) and interior (aesthetic and moderate wear) uses
- Consumer goods: Appliances, housewares, lighting fixtures, and athletic equipment benefiting from wear resistance and decorative finishes
- Electronics and aerospace: Spot-welded or riveted assemblies requiring protection in crevice or humid conditions
This standard helps manufacturers and purchasers ensure consistent quality, performance, and longevity of anodized aluminum products for a range of service conditions, from very severe outdoor exposure to specialized interior applications.
Related Standards
- ASTM B117: Practice for operating salt spray (fog) apparatus - corrosion testing
- ASTM B136: Test method for measurement of stain resistance of anodic coatings
- ASTM B137: Test method for measuring coating mass per unit area
- ASTM B244: Test method for measuring thickness of anodic coatings via eddy current
- ASTM B368: Copper-accelerated acetic acid salt spray testing (CASS)
- ASTM B457, B487: Test methods for electrical impedance and thickness by cross-section
- ASTM B602: Attribute sampling of metallic and inorganic coatings
- MIL-STD-105, MIL-STD-414: Military standards on sampling procedures for inspection
By referencing ASTM B580 and these related standards, organizations can achieve high-quality, reliable anodic coatings on aluminum, appropriate for a broad spectrum of industrial and commercial uses.
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National Aerospace and Defense Contractors Accreditation Program (NADCAP)
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CARES (UK Certification Authority for Reinforcing Steels)
UK certification for reinforcing steels and construction.
DVS-ZERT GmbH
German welding certification society.
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Frequently Asked Questions
ASTM B580-79(2019) is a technical specification published by ASTM International. Its full title is "Standard Specification for Anodic Oxide Coatings on Aluminum". This standard covers: 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. 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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. 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM B580-79(2019) is classified under the following ICS (International Classification for Standards) categories: 25.220.20 - Surface treatment. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM B580-79(2019) has the following relationships with other standards: It is inter standard links to ASTM B580-79(2014), ASTM B457-67(2013), ASTM B117-11, ASTM E430-11, ASTM B602-88(2010), ASTM B117-09, ASTM B137-95(2009), ASTM B244-09, ASTM B368-09, ASTM B457-67(2008)e1, ASTM B136-84(2008)e1, ASTM B117-07a, ASTM B487-85(2007), ASTM B117-07, ASTM E430-05. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM B580-79(2019) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: B580 −79 (Reapproved 2019)
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 U.S. Department of Defense.
1. Scope B137 Test Method for Measurement of Coating Mass Per
Unit Area on Anodically Coated Aluminum
1.1 This specification covers requirements for electrolyti-
B244 Test Method for Measurement of Thickness ofAnodic
cally formed porous oxide coatings on aluminum and alumi-
Coatings on Aluminum and of Other Nonconductive
num alloy parts in which appearance, abrasion resistance,
Coatings on Nonmagnetic Basis Metals with Eddy-
electrical properties, and protection against corrosion are
Current Instruments
important. Nonporous, barrier layer anodic coatings used for
B368 Test Method for Copper-Accelerated Acetic Acid-Salt
electricalcapacitorsarenotcovered.Seventypesofcoatingsas
Spray (Fog) Testing (CASS Test)
shown in Table 1 are provided. Definitions and typical ex-
B457 Test Method for Measurement of Impedance of An-
amples of service conditions are provided in Appendix X1.
odic Coatings on Aluminum
NOTE 1—It is recognized that uses exist in which modifications of the
B487 Test Method for Measurement of Metal and Oxide
coatings covered by this specification may be required. In such cases the
Coating Thickness by Microscopical Examination of
particular properties desired by the purchaser should be the subject of
Cross Section
agreement between the purchaser and the manufacturer.
B538 Method of FACT (Ford Anodized Aluminum Corro-
1.2 The values stated in SI units are to be regarded as
sion Test) (Withdrawn 1986)
standard. No other units of measurement are included in this
B602 Test Method for Attribute Sampling of Metallic and
standard.
Inorganic Coatings
1.3 This international standard was developed in accor-
D658 Test Method for Abrasion Resistance of Organic
dance with internationally recognized principles on standard-
Coatings by Air Blast Abrasive (Withdrawn 1996)
ization established in the Decision on Principles for the
E429 Test Method for Measurement and Calculation of
Development of International Standards, Guides and Recom-
Reflecting Characteristics of Metallic Surfaces Using
mendations issued by the World Trade Organization Technical
Integrating Sphere Instruments (Withdrawn 1996)
Barriers to Trade (TBT) Committee.
E430 TestMethodsforMeasurementofGlossofHigh-Gloss
Surfaces by Abridged Goniophotometry
2. Referenced Documents
2.2 Other Standards:
2.1 ASTM Standards: MIL-STD-105 Sampling Procedures and Tables for Inspec-
B110 Method for Testing Dielectric Strength of Anodically tion by Attributes
Coated Aluminum (Withdrawn 1982) MIL-STD-414 Sampling Procedures and Tables for Inspec-
B117 Practice for Operating Salt Spray (Fog) Apparatus tion by Variables for Percent Defective
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
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 Conversion Coatings.
anodizing practices. Accordingly, defects in the coating that
Current edition approved April 1, 2019. Published April 2019. Originally
result from such conditions shall not be cause for rejection.
approved in 1973. Last previous edition approved in 2014 as B580 – 79(2014).
DOI:10.1520/B0580-79R19.
NOTE 2—To minimize problems of this sort, the specifications covering
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the basis material or the item to be anodized should contain appropriate
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 (2019)
TABLE 1 Anodic Coatings Descriptions
either be described in detail along with its requirements or the
appropriate specification(s) must be referenced.
NOTE 1—Hard coatings may vary in thickness from 12 µm to more than
100 µm. If the thickness of TypeAis not specified, it shall be 50 µm min.
Type A coatings will not be sealed unless so specified. 6. Quality Assurance
Type Coating (Industry) Description Minimum Film Thickness (µm)
6.1 Anodic oxide coatings can be produced to have many
A Engineering Hard Coat 50
different characteristics. No single coating can be expected to
B Architectural Class I 18
C Architectural Class II 10 have all of these characteristics. Therefore, the quality assur-
D Automotive—Exterior 8
ance requirements for a given coating should be selected to
E Interior—Moderate Abrasion 5.0
control those properties necessary to the expected end use for
F Interior—Limited Abrasion 3
G Chromic Acid 1
the product.
6.2 Anodic coatings supplied under this specification shall
meet the minimum requirements for film thickness as stated in
limitations on such basis metal conditions.
Table 1.
3.2 The basis metal shall be subjected to such mechanical
6.3 The following ASTM test methods are applicable to
finishing operations, cleaning, and chemical or electrolytic
anodic coatings within the scope of this specification: B110,
pre-treatments as are necessary to yield anodic coatings with
B117, B136, B137, B244, B368, B457, B487, B538, D658,
the final quality and a
...
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