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Hardcoat Anodize with Teflon Impregnation

At AOTCO, we offer a variety of metal finishing services to our clients. Of those services, we provide four different kinds of anodizing processes: 

  • Type I Chromic Acid Anodize
  • Type II Sulfuric Acid Anodize 
  • Type IIB Thin Sulfuric Acid Anodize 
  • Type III Hardcoat Anodize

Each of these processes provides their own set of benefits and qualities to their substrates, and each has their own unique industry applications. In this article we’d like to take a closer look at Hardcoat Anodize, and the benefits of combining it with Teflon.

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What is Hardcoat Anodize?

The third type of anodize, Hardcoat anodize, provides its substrate with the thickest oxide layer of all the anodizing processes. This thick layer makes for increased corrosion resistance, strength, and abrasion resistance. Due to the thickness of the coat, there is a limited selection of color dyes that can be applied; however, type III still provides for the strongest and longest lasting finish of all the anodizing processes.


What is Teflon | Teflon Impregnation?

Teflon, or Polytetrafluoroethylene, PTFE for short, is a strong, wax-like, non-flammable resin. PTFE is synthetically produced through the polymerization of tetrafluoroethylene. Teflon is non-reactive, hydrophobic, and has a very low coefficient of friction. Due to these qualities, Teflon is commonly used for non-stick cookware, as well as components that need to be resistant to friction like gaskets, gears, and slide plates. 

The oxide layer that is formed during the Hardcoat anodizing process is porous, meaning its entire surface is covered with small holes. During the Teflon impregnation process, PTFE particles are placed on the surface of the oxide layer and, through a chemical reaction, are bonded to the substrate. Teflon particles are often too large to fit in the porous holes on the surface of the oxide layer, so the term impregnation is slightly misleading. Once bonded, the Teflon Hardcoat provides a hard, wear resistant, self-lubricating layer to its substrate. 

What are the Benefits of Teflon Impregnation?

The unique strength to lubricity ratio of Hardcoat Anodize with Teflon Impregnation gives it a wide variety of benefits. Some of the most notable benefits of PTFE Hardcoat anodize are: 

  • Corrosion Resistance 
  • Wear/Abrasion Resistance 
  • Resistant to Chipping/Flaking/Peeling 
  • Resistant to Galling
  • Low Friction Coefficient
  • Self-Lubricating 

Industrial Applications of Hardcoat Anodize with Teflon

With an array of beneficial qualities, PTFE impregnated Hardcoat anodize is utilized in a variety of different industries. Some of the most common industry applications of Hardcoat Anodize with Teflon Impregnation are: 

  • Aerospace/Aviation Industries
  • Defense/Firearms Industries
  • Marine/Naval Industries
  • Electronics 
  • Cooking wear/Food Industry

Hardcoat Anodize Specs

At AOTCO, we are diligent in staying up to date with the latest industry specifications and procedural changes. We comply with the following specs for Hard Anodize: 

  • AMS 2468
  • AMS 2469
  • AMS-A-8625
  • MIL-A-8625
  • MIL-PRF-8625
  • ASTM B580

In Conclusion

AOTCO offers PFTE and Hardcoat anodizing services, as well as a plethora of other metal finishing services. We have a team of dedicated platers and engineers that are ready to aid in your next metal finishing project. If you have any questions about our Teflon and Hardcoat anodizing processes, or any other metal finishing inquiries, contact us at 1-888-275-0880!


Looking for Specs?

Learn more about the specifications AOTCO offers, including NADCAP-accredited and RoHS-compliant ones.
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