The process by which aluminum and its alloys, under the influence of an external current and in the presence of the corresponding electrolyte and specific processing conditions, form an oxide film on …

In most daily production processes, products need to undergo hard anodizing to enhance the sealing treatment of the oxide film.

Aluminum and its alloys can easily form a very thin layer of aluminum oxide on their surfaces (with a thickness of approximately 0.01 to 0.02 micrometers).