US Department of Defense and aerospace-industry specifications for aluminium anodizing. Used internationally for defence components, aerospace structural parts, and high-reliability industrial applications. The most-cited is MIL-A-8625, which defines Type I, II, and III anodize chemistries.
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SAE Aerospace Material Specification for hard anodic coatings on aluminium and aluminium alloys (also known as Type III hard anodize). Specifies processing parameters, coating thickness ranges (typically 25-75 μm), hardness requirements, and dimensional tolerance allowances for aerospace applications. Frequently referenced jointly with MIL-A-8625F Type III but with tighter performance bands for aerospace use.
US military detail specification for chromate and non-chromate chemical conversion coatings on aluminium — the conversion coating equivalent of anodize for applications requiring electrical conductivity (e.g. RF grounding, antenna housings) where anodize's insulating film is incompatible. Defines Class 1A (full corrosion protection) and Class 3 (electrical conductivity-preserving) coatings. Increasingly important as the industry moves from hexavalent chromate to trivalent chromium and non-chrome alternatives.
The canonical US military specification for anodic coatings on aluminium. Defines Type I (Chromic Acid Anodize), Type II (Sulphuric Acid Anodize), and Type III (Hard Anodize) chemistries, plus Class 1 (non-dyed) and Class 2 (dyed) finishes. Specifies coating-weight requirements, thickness ranges, salt-spray performance (per ASTM B117), and stripping tests. The reference specification cited internationally for defence, aerospace, and high-reliability industrial anodizing — including by Indian fabricators supplying defence OEMs. Revision F with Notice 1 is the current version.