How can 120 series aluminum alloy curtain wall profiles achieve long-term corrosion resistance?

In modern building curtain wall systems, 120 series aluminum alloy curtain wall profiles have become an important choice for building facade materials due to their excellent corrosion resistance. Its corrosion resistance is not accidental, but comes from the synergy of the material's own chemical properties and microstructure. This performance not only ensures the lasting beauty of the building's appearance, but also effectively extends the service life of the curtain wall system and reduces the maintenance cost of the entire life cycle.

The core of the corrosion resistance of 120 series aluminum alloy curtain wall profiles lies in the aluminum oxide film that spontaneously forms on its surface. Aluminum elements react easily with oxygen in the air, forming a dense and continuous aluminum oxide (Al2O3) oxide film on the surface of the profile. Although the thickness of this oxide film is only micrometers, it has extremely high chemical stability and structural density, like a natural barrier, isolating the aluminum matrix from the external environment. When corrosive substances such as moisture, acidic or alkaline media contact the surface of the profile, the oxide film can effectively prevent these substances from penetrating into the aluminum matrix, thereby avoiding electrochemical reactions and chemical corrosion.

From the perspective of microstructure, the oxide film of the 120 series aluminum alloy presents an ordered crystal structure with a tightly arranged lattice and small and evenly distributed pores, which further enhances the barrier ability to corrosive media. During the processing of the profile, the oxide film can be artificially thickened through processes such as anodizing to further improve its protective performance. This method of strengthening the oxide film through process optimization allows the 120 series aluminum alloy curtain wall profile to adapt to more complex and changeable use environments.

Under different environmental conditions, the corrosion resistance of the 120 series aluminum alloy curtain wall profile is particularly significant. In a high humidity environment, moisture is a key factor in accelerating metal corrosion, and the oxide film can effectively prevent moisture from directly contacting the aluminum matrix to avoid electrochemical corrosion. Even in an environment where the humidity is saturated for a long time, rust is not easy to appear on the surface of the profile. In coastal areas with high salinity, a large amount of salt particles in the air can easily absorb water to form electrolyte solutions, accelerating metal corrosion. However, the 120 series aluminum alloy curtain wall profiles can resist salt spray erosion with the protection of the oxide film. Even if they are exposed to sea breeze and salt spray for years, they can still maintain good appearance and mechanical properties, and will not have the problem of structural strength reduction due to corrosion.

For areas with serious industrial pollution, acidic gases such as sulfur dioxide and nitrogen oxides in the air combine with water vapor to form acid rain, which is extremely corrosive to metal materials. The oxide film of the 120 series aluminum alloy curtain wall profile has a certain acid and alkali resistance, which can neutralize acidic substances to a certain extent and slow down the corrosion process. Its chemical stability enables the profile to maintain structural integrity and appearance quality in an acid rain environment, reducing frequent replacement and maintenance caused by corrosion.

The corrosion resistance of the 120 series aluminum alloy curtain wall profile brings significant benefits to building curtain walls. Due to the reduction of damage caused by corrosion, the service life of the curtain wall can be greatly extended, reducing the cost of frequent replacement of curtain wall materials in the later stage of the building. Good corrosion resistance ensures the long-lasting beauty of the curtain wall appearance, without the need for frequent surface cleaning and repair, saving maintenance manpower and material resources. For the building as a whole, a stable and reliable curtain wall system not only improves the safety of the building, but also enhances the durability and value preservation of the building.

At a time when architectural design and material selection are increasingly focusing on sustainability, the 120 series aluminum alloy curtain wall profiles provide guarantees for the long-term and stable operation of the building with their excellent corrosion resistance. Its corrosion resistance in different environments demonstrates the exquisite combination of material science and engineering technology, and also provides a reliable solution for modern buildings to achieve a balance between beauty and practicality. With the continuous development of the construction industry, the corrosion resistance of the 120 series aluminum alloy curtain wall profiles will surely play an important role in more construction projects, helping to create more durable and environmentally adaptable building facades.