Aluminum Anodizing Type 3 Hardcoat

Hard Coat Anodizing: Type III

Hardcoat Anodizing, often called "Type III anodizing" as denoted by MIL spec 8625, is an electrochemical process that creates a controlled oxide film on the surface of aluminum. Hardcoat Anodizing utilizes sulfuric acid, low bath temperatures, and constant current rectification to achieve a very hard coating (60-70 Rockwell C). Hardcoat Anodizing is generally used for applications that need a corrosive, abrasive, and wear resistant coating. The appearance of the coating ranges from light to dark gray, depending on the alloy makeup of the aluminum substrate, and it can also be dyed black. Parts can be processed with multiple finishes, such as Hard Coat/Chem Film or Hard Coat/Electroless Nickel.

Properties of Hardcoat Anodizing:

• Improved paint adhesion
• Compatible with adhesives
  
• Excellent lubricity
• Resistant to marine and atmospheric corrosion
• High operating temperatures
  
• Electrically resistant
  
• Galvanic neutrality (prevents galvanic corrosion from interaction between dissimilar metals)
  

Chem Processing Inc. Type III Anodizing Plating Capabilities:

• Typical Formed Thickness is 0.0001 to 0.0030 inches
• Available with PTFE (Teflon®)
• Bulk and Rack Processing
• Available Masking for Selective Surface Anodizing
• Salt Spray Corrosion Test (minimum 336 hours of salt spray resistance)
• Thickness Analysis
• Coating Weight Analysis
• Taber Abrasion Test
• Dielectric Testing
• Post Anodize Seal (may reduce hardness)

Applicable Specifications:

Typical Type III Applications:

• Aerospace/Astrospace/Aviation: wear resistance, dry lubrication, longevity and electrical insulation
• Firearms: corrosion and wear resistance
• Machinery: abrasion resistance for high-speed machine parts
• Electronics: uniform emissivity and a high dielectric
• Marine/Naval: corrosion resistance in salt-water environments
• Oil and Petrochemical: corrosion protection and wear resistance.
• Ordnance: corrosion protection, abrasion resistance and wear resistance
• Cookware: corrosion protection and non-stick properties
• Molds and Dies: improved release properties and abrasion resistance
• Sporting Goods: improved durability and performance

Chem Processing Inc. offers hardcoat anodizing services to Illinois, Wisconsin, Iowa, the Midwest and beyond. CPI is strategically located by highway routes to Chicago, Milwaukee, Madison, St. Louis, and Minneapolis. The CPI facility is minutes from Rockford Chicago International Airport, a major Midwestern air freight hub, enabling efficient door-to-door delivery across the United States or across the globe.