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Type III Aluminum Anodizing

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About the Process

Type III aluminum anodizing services enhance many desirable properties of aluminum. It improves electrical resistance, thermal conductivity, and provides the part with the hardness of steel.

The build up for hardcoat anodizing services is much thicker than your standard anodizing. The typical build up of this coating is 0.001î and also 0.001î penetration into the material.

The color of the aluminum oxide build up from hard coat anodizing depends greatly on the alloy of the aluminum material. The color can range from a champagne/gold hue to a dark gray.

If you are in need of a long part hardcoat anodized we have some of the longest anodizing tanks in Houston! Request a quote for hard anodize services today.


  • MIL-A-8625


  • Black
  • Clear
  • Gold
  • Green
  • Blue
  • Red

MIL-A-8625 Type III / Type 3 Hard Coat Anodizing

Base Materials that MIL-A-8625 Anodize Type III hard coat anodizing can be applied include 1100, 3000, 5000, 6000, and 7000 series aluminum alloys. Please note that we are unable to hard anodize 2000 series aluminum due to the high copper content.

  • Class 1: Specifies that there will be no dye applied to the finished part.
  • Class 2: Specifies that there will be a dye applied to the finished part during the hard anodizing process.

MIL-SPEC Coatings

We provide metal finishing services for most MIL-SPEC coatings. All finished parts are inspected by our quality control center to make sure the highest standards are met.

Frequently Asked Questions

The answer is no! Hard anodize is a much thicker and abrasion resistant coating compared to sulfuric anodizing.

The answer is yes; however, it must be noted that stripping the anodic coating will cause some loss in the base material.

The answer is no, the part being anodized must only be aluminum. Anything else will be destroyed in the sulfuric anodizing process.

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  • 8736 Schumacher Ln
    Houston, TX 77063
  • Toll-Free: (877) 311-0123
    Phone: (713) 785-4955