Type III, Hardcoat Anodizing (HCA)

The primary objective of this process is to obtain a hard coating, resistant to abrasion. It is obtained using an electrolyte of sulfuric acid at low temperature with high voltage and curent density.

 
  • Description
    • Highest wear resistance
    • Very good electrical insulation, 800V/mil
    • Thicker and denser than sulfuric anodizing, films range from .002"-.004" thick. (50% penetration, 50% over substrate)
    • Dimensions will change and have to be considered into the design.
    • Compatible with the alloys from 5000 to 7000, please call for special applications.
    • Hardness of the anodic layer to 60-70 Rc
    • Natural color from charcoal to dark bronze depending on the alloy
      May be colored black only
    • Recommended for aluminum components subject to extreme wear or corrosive environments.
    •  Can be used to reconstruct a surface worn or miss-machined part to size.
    • More expensive than other types.
  • Benefits
    • Improved wear resistance
    • The coating is harder than tool steel
    • Non-conductive
    • Can be dyed black only
    • Can be buffed, polished, or honed.
    • Can be used to rebuild a worn or miss-machined surface of a part to the desired dimension
  • Application
    • Valves
    • Pistons
    • Sliding parts, rails, bushing...
    • Tooling
    • Hinge mechanisms
    • Gears
    • Cams
    • Swivel joint
    • Insulation plates