Hard Anodize

MIL-A-8625F, Type III, Class 1 or 2

Hardcoat anodize, while usually done in a sulfuric acid based electrolyte, is much thicker and denser than the more conventional sulfuric acid anodize. Hardcoat is specified for aluminum components subject to extreme wear applications where superior abrasion resistance is needed, or corrosive environments where a thicker, harder, more durable coating is necessary. It can also be valuable where enhanced electrical insulation is required. Since hardcoat anodize can be built up to several thousandths, in some cases, it may help to salvage worn or mis-machined parts.

Benefits of hardcoat anodize include the following: improved wear resistance; non-conductive; can repair worn surfaces on aluminum; improved surface for slide applications; can be black dyed; other colors less decorative; finish is harder than tool steel; can be ground or lapped.

CHT provides the following

Type III – Hard Anodizing

Class 1 – Non-dyed
Class 2 – Dyed – Black


Contact us for hard anodizing services
  • 607-724-1094
  • 607-724-6990
  • @ quote@chthompson.com
  • 349 Industrial Park Drive
    Binghampton, NY 13904

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