Anodic Structure For Anodizing Aluminum

1) Structure of anodic oxidation film Anodic oxidation film is composed of two layers, the outer layer is called porous layer, thick, loose porous, low resistance. The inner layer is called the barrier layer (also known as the active layer), which is thin, dense and has high resistance. The porous outer layer grows on a dense inner layer with dielectric properties. In general, the anodized film is a hexagonal column array, each column has a star-shaped hole filled with solution, shaped like a honeycomb structure, the thickness of the hole wall is twice the diameter of the pore.

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