This unification establishes the classification and characteristics of the anodic oxide layers that can be brassed onto aluminum and its alloys by electrolytic processes for protective and decorative purposes. This unification does not concern thick layers for anti-wear application.
UNI 4522-1966 history
1966UNI 4522-1966 Anodizing coating of aluminum and its alloys. Grading, Characterization and Acceptance