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SAE AMS2471 Revision H, February 1, 2014
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Anodic Treatment of Aluminum Alloys Sulfuric Acid Process, Undyed Coating
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AIA/NAS Aerospace Standards

This specification establishes the requirements for undyed anodic coatings on aluminum alloys.


This process has been used typically to increase corrosion resistance and to provide surfaces that will promote adherence of paint and other organic finishes, but usage is not limited to such applications.

AMS2472 should be specified for coatings colored by dyeing. This process is not suitable for parts that contain joints or recesses in which the anodizing solution may be retained.

Safety - Hazardous Materials

While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.