BAC 5632 / MIL-A-8625 Boric Sulfuric Anodizing

Developed by Boeing Aerospace as an chrome free alternative to type I, Chromic acid anodizing, for non-critical fatigue part


Paint adhesion equal or supperior to Type I

Corrosion protection



  • Environmental friendly alternative to Type I, chromic anodizing.
  • Aircraft and aerospace components
    • MIL-A-8625, Type Ic
    • Boeing's BAC 5632.
  • Used for corrosion protection and paint adhesion.


  • Good for tight tolerance parts: will not change dimensions
  • Corrosion protection
  • Paint adhesion
  • Good bonding protperties
  • Non-Conductive


  • Precision Machined Components
  • Aircraft and aerospace components