Anodizing

Cleaning

  • Degreasing: Remove any oils, grease, or contaminants from the aluminum surface.
  • Alkaline Cleaning: Use a caustic solution to strip away any remaining impurities.

    • Acid Etching

    Immerse the aluminum in an acid bath to create a rough surface for better adhesion of the oxide layer.

    Rinsing

    Water Rinse: Thoroughly rinse the aluminum to remove any residual chemicals.

    Anodizing

  • Electrolyte Bath: Place the aluminum in an electrolytic bath containing sulfuric acid or chromic acid.
  • Electric Current: Apply a direct electric current to the aluminum, causing oxygen ions to react with the aluminum atoms and form a protective oxide layer.