Explain the (like Salt Spray) in more detail. Compare these types to Military Specification MIL-A-8625 . Provide maintenance tips for architectural coatings.
Are you currently specifying anodizing for a project? Do you prefer using specific historical standards or always the latest revision? Let me know in the comments!
Whether you are working with hard‑coat anodizing for engineering wear resistance, architectural Class I finishes for building exteriors, or chromic acid anodizing for aircraft components, ASTM B580 provides the authoritative framework for achieving consistent, durable, and verifiable anodic coatings on aluminum. By understanding the standard’s scope, its seven coating types, its revision history, and the availability of the PDF, you are equipped to specify, inspect, and apply porous anodic oxide coatings with confidence.
Utilizing Type G (Chromic) for structural components due to its minimal impact on fatigue strength, and Type A for high-wear landing gear mechanisms.
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To understand the significance of the "79" designation, it is crucial to note that this indicates the year of original adoption or last revision—. This standard was active for several years before being superseded or withdrawn. Unlike many modern ASTM standards that are updated every 5-10 years, B580-79 represents a specific snapshot of electroplating technology from the late 1970s.
: 5.0 micrometers (μm) / 0.0002 inches (0.2 mils).
Throughout its long history, ASTM B580-79 has been the backbone of quality control in anodizing for countless industries. The seven coating types cover nearly every possible application for aluminum finishing:
This standard provides a classification system consisting of seven types
The ASTM B580 standard categorizes anodic coatings into based on their thickness, processing method, and intended environmental application. Coating Type Common Description Minimum Thickness Typical Application Type A 2.0 mils (50 µm) Extreme wear resistance, industrial gears, pistons Type B Architectural (Exterior) 0.7 mils (18 µm) Exterior building panels, window frames Type C Architectural (Interior) 0.4 mils (10 µm) Interior storefronts, trim, handrails Type D Decorative (Medium) 0.2 mils (5.0 µm) Consumer electronics, automotive trim Type E Decorative (Light) 0.1 mils (2.5 µm) Bright trim, indoor lighting reflectors Type F Flash Anodizing Less than 0.1 mils Pre-treatment for paint or temporary protection Type G Chromic Acid Anodizing 0.05 to 0.3 mils Aerospace components, fatigue-sensitive parts Key Technical Requirements of the Standard
The standard outlines specific requirements for anodic oxide coatings, including:
ASTM B580 references numerous to verify coating quality: