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Hardcoat Anodizing Presentation

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Hardcoat Anodizing Presentation

Alpha Metal Finishing provided a hardcoat anodizing lunch and learn presentation in May 2014. Special thanks to Rob Pawson from Reliant Aluminum Products for assisting us.

Alpha Metal Finishing provided a hardcoat anodizing lunch and learn presentation in May 2014. Special thanks to Rob Pawson from Reliant Aluminum Products for assisting us.

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Hardcoat Anodizing Presentation

  1. 1. Hardcoat Anodizing Lunch and Learn May 22, 2014
  2. 2. www.alphametal.com www.reliantaluminumproducts.com Hardcoat Anodizing Lunch and Learn Presenters: Rob Pawson, Reliant Aluminum Products Bob Wood, Alpha Metal Finishing Brian Muscat, Alpha Metal Finishing
  3. 3. “However beautiful the strategy, you should occasionally look at the results.” --Sir Winston Churchill
  4. 4. What is Anodizing? Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. The anodic oxide structure originates from the aluminum substrate and is composed of aluminum oxide. This aluminum oxide is not applied to the surface like paint or plating, but is fully integrated with the underlying aluminum substrate, so it cannot chip or peel. It has a highly ordered, porous structure that allows for secondary processes such as coloring and sealing. More info at www.anodizing.org
  5. 5. What is Hardcoat Anodizing?  Hard anodized coatings or hard anodizing (Type III) is similar to standard anodizing, (Type II) in as much as it also creates a film of aluminum oxide on the part.  It is produced at colder temperatures (typically 30 °F) with much higher voltage and current. This provides a surface that is harder and more wear and corrosion resistant than standard anodizing.
  6. 6. Some of the characteristics of hardcoat:  Hard anodized coatings can be grown to greater thickness, typically .002 inches or more  50% penetration and 50% buildup per surface  Hardcoat finishes are typically darker in appearance than standard anodizing depending on the coating, thickness and alloy  Hardness – Rockwell scale rating of C - 60 / 70
  7. 7. Benefits of Hardcoat:  Corrosion Resistance  Variable Thickness – smaller tolerances than previously available  Wear Resistance  Resistance to chemicals, solvents and petroleum based products  Electrical Resistance  Temperature Resistance  Low Friction Coefficient after Lubrication
  8. 8. To Seal or Not To Seal? After a component has been hardcoat anodized, it may or may not be sealed.  If the main purpose of the application is to obtain a maximum degree of abrasion or wear resistance then the coating should not be sealed.  If the main purpose of the application is for corrosion resistance and reduced abrasion resistance is not a concern, sealing is advised.
  9. 9. Some of the potential challenges that come into play during the hardcoat process:  Dimensional Growth and Crucial Tolerances  Threads and Holes  Sharp Corners and Points  Different Alloys  Racking Concerns
  10. 10. PTFE, or polytetrafluoroethylene coating, provides many benefits to hardcoated parts:  Low Coefficient of Friction  Chemical Resistance  Heat Resistance
  11. 11. Alpha provides a systematic, tightly controlled process for our hardcoat customers:  Surface area is calculated prior to processing  Utilize a proprietary coating thickness algorithm to achieve consistent coating thickness results  Our control system and process significantly reduces the risk of burning of parts, particularly 2024 alloys
  12. 12. Alpha can provide color hardcoat options to customers with a variety of colors.  Material Preparation  Alloys and How They Affect Color  Hardcoat Applications
  13. 13. Got Any Questions? www.alphametal.com www.reliantaluminumproducts.com

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