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ASTM International. ASTM B580-79: Standard Specification for Anodic Oxide Coatings on Aluminum. ASTM, 1979. (Withdrawn)
ASTM B580-79 is a standards specification related to nickel-copper alloy (Monel) rod, bar, and forgings (designation and year indicate the 1979 revision). If you need the PDF of this standard:
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ASTM B580-79 is a widely recognized industrial standard specification for anodic oxide coatings on aluminum. This specification outlines the requirements for electrolytically formed porous oxide coatings, primarily focusing on aluminum and aluminum alloy parts where appearance, abrasion resistance, electrical properties, and corrosion protection are critical. Overview of the Specification
Anodizing is an electrochemical process that develops an aluminum oxide layer on the surface of a part. The ASTM B580 standard classifies these coatings into seven distinct types (A through G) based on their intended service conditions and coating thickness.
Scope: It covers porous oxide coatings but specifically excludes nonporous barrier layer coatings used for electrical capacitors.
Sealing: Parts are typically sealed in water or aqueous chemical solutions to enhance corrosion resistance, unless otherwise specified for specific industrial needs. astm b580-79 pdf
Quality Standards: Each coating must be continuous, smooth, and free of defects like stains, burns, or loose films. Seven Classification Types
The specification provides a framework for selecting the right finish based on environmental exposure: Intended Application/Characteristics Type A
Hard Coat: Often used in aerospace for maximum wear and abrasion resistance. Standard thickness is typically 50 µm unless otherwise specified. Type B
Exterior Architectural: High resistance to weathering and corrosion. Type C
Interior Architectural: Balanced for aesthetics and moderate durability. Type D Automotive/Industrial: General-purpose industrial coatings. Type E Decorative: Prioritizes uniform appearance and color. Type F
Engineering/Thin: Used where precise tolerances are required. Type G Specialty: Tailored for unique service conditions. Industrial Applications
ASTM B580 is frequently cited in high-stakes industries such as:
Aerospace: For components requiring electrical insulation and high longevity.
Marine: To ensure long-lasting protection against harsh saltwater environments.
Machinery: For high-speed parts that need superior abrasion resistance.
Electronics: To provide uniform emissivity and high dielectric strength. Document Status and Access
Standard Specification for Anodic Oxide Coatings on Aluminum Here’s a draft write-up for a webpage, document
ASTM B580-79 is the standard specification for Anodic Oxide Coatings on Aluminum. It defines the requirements for porous oxide coatings used when appearance, abrasion resistance, and corrosion protection are needed. 📋 Key Details Designation: ASTM B580-79 (Reapproved 2019)
Scope: Covers electrolytically formed porous coatings on aluminum/aluminum alloy parts.
Exclusions: Does not cover nonporous barrier layer coatings (like those in capacitors).
Status: Currently withdrawn (as of April 2025), though widely used in historical or specific industrial contexts. 🧪 Coating Classifications (Table 1)
The standard provides seven distinct types of coatings based on thickness and service intent: Type Description Min. Thickness Typical Application A Engineering Hard Coat High wear, marine, machinery parts B Architectural Class I Exterior facades (unmaintained) C Architectural Class II Exterior windows (maintained) D Automotive Exterior Exterior trim, grills E Interior-Moderate Abrasion Appliances, nameplates, reflectors F Interior-Limited Abrasion Interior trim, housewares G Chromic Acid Aircraft assemblies, lap joints 🛠️ Manufacturing Requirements
Base Metal: Defects like scratches or pits in the aluminum will affect the final coating quality.
Pretreatment: Surfaces must be cleaned and mechanically or chemically finished before anodizing.
Sealing: Parts must be sealed in water or chemical solutions to ensure corrosion resistance (except for some Type A applications).
Workmanship: Coatings must be continuous, adherent, and free of "burns" or powdery areas. 🔗 Resources & Access
Full Text (Legally Binding): You can view the historical text at the Internet Archive.
Official Purchase: The current version is available at ASTM International or ANSI.
Testing Reference: Common tests cited include B117 (Salt Spray) and B136 (Stain Resistance). How to Legitimately Obtain ASTM B580-79 PDF If
💡 Key Point: When specifying this standard, always indicate the Type (A-G) and the Minimum Film Thickness required for your specific part. If you'd like, I can:
Explain the testing methods (like Salt Spray) in more detail. Compare these types to Military Specification MIL-A-8625. Provide maintenance tips for architectural coatings.
ASTM B580-79 (Reapproved 2019) is a standard specification for Anodic Oxide Coatings on Aluminum
. It provides requirements for porous oxide coatings electrolytically formed on aluminum and aluminum alloy parts to improve appearance, corrosion resistance, and abrasion resistance. Scope and Classification The standard identifies seven specific types
of anodic coatings based on their thickness and intended application: Industry Description Minimum Film Thickness ( Engineering Hard Coat Architectural Class I Architectural Class II Automotive—Exterior Interior—Moderate Abrasion Interior—Limited Abrasion Not specified Chromic Acid Anodizing Not specified Key Requirements Porous Nature
: The specification covers porous coatings; it specifically excludes nonporous barrier layer coatings used for electrical capacitors. Appearance
: Coatings must be continuous, smooth, adherent, and uniform. They should be free from powdery areas, burns, stains, or discolorations.
: Most anodized parts must be sealed in water or aqueous chemical solutions to improve stain and corrosion resistance, except where otherwise specified (such as Type A hard coats). Measurement
: Thickness can be measured using various methods, including eddy-current instruments ( ) or microscopical examination ( Availability and Status
Standard Specification for Anodic Oxide Coatings on Aluminum
Many defense and aerospace components produced from 1980 through the mid-1990s were manufactured to this specific revision. If you are maintaining aging aircraft, military ground vehicles, or naval equipment, the original drawings may explicitly call out "ASTM B580-79." To validate a repair or replacement part, engineers must reference the exact standard used at the time of original manufacturing.
A: No. It is a historical standard that has been withdrawn. It should not be used for new designs unless specified in a legacy contract.