Will aluminum alloy corrode and rust?
2025,01,18
Aluminum alloys do not rust, but they do corrode. Aluminum alloys contain almost no iron, so they do not form rust (i.e. iron oxide) like iron or steel. However, when aluminum alloys are exposed to air, they react chemically with oxygen to form a very thin and hard aluminum oxide film. This aluminum oxide film acts as a protective layer, preventing further corrosion and oxidation.
However, aluminum alloys may still corrode under certain conditions. For example, in a humid environment or when in contact with electrolytes, aluminum alloys may experience localized corrosion or stress corrosion. In addition, if the aluminum oxide film on the surface of the aluminum alloy is destroyed, the aluminum alloy may continue to oxidize and form a layer of white substance similar to aluminum rust, but this is different from iron rust because aluminum rust is actually composed of aluminum oxide.
In order to improve the corrosion resistance of aluminum alloys, a variety of anti-rust measures are usually adopted, such as surface coating, anodizing, electroplating, etc. These measures can effectively prevent the corrosion of aluminum alloys in specific environments.
Aluminum alloys are most susceptible to corrosion in humid environments. This is because aluminum alloys react chemically with the environment, resulting in surface degradation, especially in humid areas, where the presence of oxidants (such as oxygen) accelerates the corrosion process. In addition, aluminum alloys are also susceptible to stress corrosion cracking (SCC) when serving in specific corrosive environments, such as salt water media or corrosive atmospheres, especially when subjected to tensile stress.
Application of different types of aluminum alloys in doors and windows
1.Ordinary aluminum alloy doors and windows:Ordinary aluminum alloy doors and windows are usually used in general buildings such as residences and offices. This type of doors and windows has a simple design and good sealing performance, and is suitable for places where sound insulation and heat preservation are not required. For example, Sliding Windows, Casement Windows and hanging windows are more common in homes.
2.Thermal Break aluminum alloy doors and windows：Thermal break aluminum alloy doors and windows use thermal insulation technology to effectively isolate the temperature difference between indoor and outdoor, and have excellent thermal insulation performance, so they are often used in cold or hot areas. This type of door and window not only has significant energy-saving effects, but also has aesthetics, and is a high-end choice commonly used in modern buildings.
3.System doors and windows:ystem doors and windows are a type of doors and windows that integrate multiple functions, including sound insulation, heat insulation, anti-theft, sunshade, etc. This type of doors and windows usually uses high-performance materials and advanced technology, and is suitable for building scenes with high performance requirements, such as high-end residences, commercial complexes, etc.
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