What is the use of the oxide film on aluminium alloy sheets?

What is the use of the oxide film on aluminium alloy sheets?

Although aluminium alloy sheets are not suitable for corrosion and oxidation, we can produce an oxide film on their surface by anodising. For example, it can be used as a base layer for painting and electroplating and, thanks to its protection, the aluminium alloy sheet is more resistant to wear and sunlight, making it more suitable for use in the construction industry.

Why can this anodised film be used as a base layer for painting and electroplating? This is due to the porous nature of the oxide layer and its good adsorption capacity, which allows it to bond well with lacquer and organic films and can be used as a base layer for painting. We use phosphoric acid anodised films as a base layer for electroplating on aluminium.

What is the role of this oxide film on aluminium alloy sheets when used in modern construction? As a result of the introduction of electrolytic colouring of aluminium alloys, the application of electrolytic colouring to aluminium profiles for construction has increased in recent years. Not only does it have suitable architectural shades of bronze, black, red, etc., but its wear resistance is better than that of conventional oxidation in general. The aluminium profiles oxidised by the electrolytic colouring method can be used not only for building doors and windows, but also for shop counters and shelves.

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