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Principle of aluminium plate anodizing

Source:Tisco Metal    Time:28 June 2023

The anodic oxidation of aluminum plates mainly uses the electrochemical principle. The material is subjected to electrolyte to form a coherent oxide film on the surface of the pole plate. The process flow is: degreasing → etching → neutralization → anodizing → colouring → sealing. Anodic oxidation can improve the corrosion resistance, surface hardness and wear resistance of aluminum products, and the colouring treatment can play a good decorative effect.

The plate will be oxidized by long-term use in the air. Although the natural oxide layer on the surface has a certain passivation effect, the film layer will still flake, corrode and discolour if overexposed for a long time.

To overcome this problem, the product needs to be anodized. After anodizing, an oxide film is formed on the surface of the aluminium sheet. The colourless and porous nature of the anodized film is used to achieve the purpose of colouring and protecting the aluminium substrate.

Anodized sheet is popular in the decorative material market, which is inseparable from its good performance. The excellent processing performance is also one of its highlights. Anodized aluminium products are highly decorative, moderately hard, and can be easily bent and formed without other complex processing, reducing production cycle and product cost. Excellent weather resistance, good corrosion resistance, fine metallic texture and high hardness, together with the popular oil resistance performance in recent years, make it a leading position in the industry.

Anodized aluminium panels not only ensure bright colours and beautiful decorative effects, but also are light in weight and easy to install, making them the choice of many manufacturers.

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