Will aluminum alloy corrode when used outdoors?（二）

1、 Factors affecting the corrosiveness of aluminum alloy for outdoor use

Materials and types of aluminum alloys: Different materials and types of aluminum alloys have different corrosion resistance. Some special types of aluminum alloys, such as the 3003 model, have strong corrosion and oxidation resistance.

Surface treatment: The oxide film on the surface of aluminum alloy has a significant impact on its corrosion resistance. If the oxide film is damaged or the thickness is insufficient, the corrosion resistance of aluminum alloy will significantly decrease. Therefore, when using aluminum alloy outdoors for a long time, it is necessary to control the oxide film on its surface to a certain thickness (such as 8 microns or more).

Environmental factors: Humidity, acidity, ion concentration, etc. in the environment can all affect the corrosiveness of aluminum alloys. For example, in environments with high humidity and acidity, the corrosion rate of aluminum alloys will accelerate.

2、 Measures to reduce corrosion during outdoor use of aluminum alloys

Choose aluminum alloy models with strong corrosion resistance, such as 3003 aluminum plates, aluminum coils, etc. These models of aluminum alloys have strong corrosion resistance and oxidation resistance.

Strengthen surface treatment: Form a stable and dense oxide film on the surface of aluminum alloy to improve its corrosion resistance. This can be achieved through processes such as anodizing and spraying.

Reduce contact with corrosive substances: Try to avoid direct contact between aluminum alloys and corrosive substances such as chloride ions and sulfate ions. For example, when used in marine environments, protective measures can be taken to reduce seawater erosion.

Regular maintenance and inspection: Regularly maintain and inspect aluminum alloys to promptly identify and address corrosion issues. For example, dirt and sediment on the surface can be removed to slow down the corrosion rate.

In summary, aluminum alloys do pose a risk of corrosion when used outdoors. To reduce this risk, it is necessary to choose aluminum alloy models with strong corrosion resistance, strengthen surface treatment, reduce contact with corrosive substances, and conduct regular maintenance and inspections.