The aluminium alloy oxide film obtained by anodising

The aluminium alloy oxide film obtained by anodising is used as a hard wear layer

In either sulphuric or oxalic acid solutions, thick and hard films can be obtained by adjusting the process conditions of anodising, using the pore and absorption properties of the film to store the selected oil, effectively applying it to the conditions of working in an abrasive state, while having the characteristics of lubrication and wear resistance, such as engine cylinders and pistons of cars and tractors.

The aluminium alloy oxide film obtained by anodising acts as an electrical insulating layer

Aluminium and its alloy oxide film layer has the characteristic of large resistance, the thickness of the film layer is proportional to the resistance, this characteristic has some practical significance as the electrical insulation, can be used as a dielectric for capacitors, can also use aluminium oxide for the outer skin of the cable, for its surface as an insulating layer to replace the rubber skin and plastic skin in foreign countries is more popular, the film thickness is 27.5μm, its wear voltage is 441V. if the use of If phenolic resin is used to fill the holes of the film, the penetration voltage can be increased by 2 times. In oxalic acid solution, when the thickness of the film is increased, a high quality insulation layer with a resistance of 200Ω and a penetration voltage of 980V can be obtained, which can of course be used for other electrical appliances in addition to the wire.

The aluminium oxide film obtained by anodising is used as a base layer for painting and electroplating.

Due to the porous nature of the oxide film and its good adsorption capacity, it has a good bond with lacquer and organic films and can be used as a base layer for painting. The phosphoric acid anodised film can be used as a base layer for electroplating on aluminium.

The aluminium oxide film obtained by anodising is used in modern construction

Due to the introduction of the electrolytic colouring process of aluminium alloy, the application of electrolytic colouring to architectural aluminium profiles has been increasing in recent years, not only does it have suitable architectural shades of bronze, black, red, etc., but its wear resistance is better than the general conventional oxidation, and what is particularly valuable is that the sunlight resistance is very good, more than 20 years of sunlight and night exposure in the atmosphere does not eliminate colour, which is incomparable with the oxidation colouring method. The aluminium profiles oxidized by electrolytic colouring method can be used not only for building doors and windows, but also for shop counters and shelves.