A to Z Metal Finishing

Anodize (Type II Sulfuric Acid)

Anodizing aluminum will improve and enhance:

  • Wear Resistance
  • Lubricity
  • Dielectric Properties
  • Heat Dissipation
  • Corrosion Resistance
  • Bonding
  • Aesthetics


  • MIL-A-8625 Type II Class 1 (clear) and Class 2 (color)
  • AMS 2471
  • AMS 2472

Two Tanks:  96” x 48” x 48” each


Hard Anodize (TYPE III Sulfuric Acid)

Aluminum Hard anodize is similar to TYPE II anodize. During the anodizing process, an anodic film is formed by converting the surface into aluminum oxide. The aluminum oxide is uniform, denser and much harder than natural oxidation.

     Benefits of Hard Coat Anodized Aluminum.

          -Corrosion resistance
          -Dielectric properties
          -Improve lubrication
          -Increase wear resistance
          -Increased abrasion resistance
          -Flame resistance

It is important to understand, that hard coat will affect the final dimensions. 50% of the coating penetrates into the surface and 50% of the coating builds up on the surface. The final dimension is determined by the thickness of the coating. The typical thickness that is required for hard coat anodizing is .002 and controlled with great accuracy. In hard coat anodizing, if aluminum not dyed (Class 1), the color of aluminum will charge depend on alloy and thickness of the coat. If dyed (Class2), black is the color most commonly used. Other colors also available.


Anodize tank: 48” X 96” X 48”


Sample Colors

anodize colors