Type II Anodizing

Type II anodizing is the most common and most widely used form of anodizing. 

The process is an electrochemical method that is performed by placing aluminum in a sulfuric bath and applying a prescribed amount of DC current to achieve the oxide thickness needed. The metal becomes an “anode” hence the name anodizing.  This process builds up an aluminum oxide layer on the surface that also penetrates down into the aluminum material and forms an integral part of the metal. Typically, half of the coating thickness will be surface build up and the other half will be penetration into the metal.  

 The resulting anodized surface is then ready to be colored or sealed. 

Type II anodizing is best suited for aluminum, but it may also be used for nonferrous metals such as titanium or magnesium. It is most commonly based off the military specification MIL-A_8625. This specification is used around for the world for commercially anodized aluminum in various industries including the automotive, medical, and aerospace, industries as well as for military and defense applications.

Type II Anodizing Provides:

  • Exceptional hardness, corrosion resistance and durability
  • Increased scratch resistance
  • Better aesthetics
  • Fade Resistant color durability
  • Customizable coating thickness to meet customer specifications and price range
  • Superior paint and organic coating base

Common Applications for Type II Anodizing Include:

  • Electrical products and enclosures
  • Architectural aluminum-door frames, windows frames and extrusions
  • Lighting fixtures
  • Appliances
  • Aerospace 
  • Automotive / Motorcycle
  • Sporting goods
  • Marine products