Boric-Sulfuric Acid Anodize

What is Boric-Sulfuric Acid Anodize?

Boric-Sulfuric Acid Anodize (BSAA) is an alternative to chromic acid anodize (CAA) due to the environmental, worker safety and health concerns and the related costs associated with continued use of hexavalent chromium-bearing processes such as CAA.

How is Boric-Sulfuric Acid Anodize different from other types of anodize?

Primary applications include aircraft and aerospace components. It is covered by MIL-A-8625, Type Ic and aerospace specifications including Boeing's BAC 5632. It is used for corrosion protection and paint adhesion. Paint adhesion is equal or superior to chromic acid, and the process is more energy-efficient than chrome-based processes.

What are the attributes / characteristics of Boric-Sulfuric Acid Anodize?

  • Good for tight tolerance parts: will not change dimensions
  • Corrosion protection
  • Good for Bonding
  • Non-Conductive

What are the applications of Boric-Sulfuric Acid Anodize?

  • Precision Machined Components
  • Aerospace/Aircraft Components
  • As a paint/prime base

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