Curtain wall with weathering steel, weathering steel can also be used like this?

As we all know, weathering steel has the characteristics of rust resistance, corrosion resistance and life extension, thinning and consumption reduction, labor and energy saving. Therefore, it is mainly used for steel structures that are exposed to the atmosphere for a long time, such as railways, vehicles, Bridges, towers, photovoltaics, and high-speed projects. So weathering steel can also be used as a curtain wall.

Curtain wall with weathering steel presents a beautiful rust red, become a beautiful landscape. So, how is the weathering steel used for the curtain wall to present such a scene through its own rust prevention effect?

First, curtain wall with weathering steel rust prevention principle

In fact, anti-rust treatment is to use chemical methods to do anti-rust treatment on the surface of weathering steel, so that it forms an anti-rust "film" to achieve the role of atmospheric corrosion resistance. It is initially stabilized with an anti-rust agent and then processed by hand, a process that takes about 30 days. The general coating treatment usually uses the method of local damage, so that the coating is peeled off to achieve the effect of rust removal, and then through the anti-rust treatment, the surface of the weathering steel forms an oxide film to resist atmospheric corrosion.

1. The first stage: small rust spots begin to appear in the real weathered joint, the rust spots on the ordinary steel plate will disappear quickly, and some rust spots are not handled well or even lost.

2. The second stage of the long rust of the steel plate: the real weathering steel has less rust water, and the rust point is small and thick; The corrosion of ordinary steel plate is more, the corrosion point is larger, and it is sparse. The corrosion column of ordinary steel plate has serious tear marks, and the bottom of the workpiece has black marks;

3. The third stage of the long rust of the steel plate: the real weathering steel has a clear and dense rust core layer, and the rust points are tightly stuck together to form a protective layer, and the rust is difficult to erase by hand; The ordinary steel plate rusts more, and even the whole rust spalling and rusting through. The weathering steel is reddish-brown, while the steel plate is reddish-brown.

Second, the curtain wall is installed with weathering steel

The modern weathering steel building curtain wall (3MM) is similar to the current aluminum exterior wall installation, and the thick layer (5MM or more) weathering steel curtain wall mostly uses the unit external hanging method. Landscape and some simple devices, the direct use of welding technology should pay attention to the following points:

1. Corrosion of welding points: the oxidation rate of welding points must be the same as that of other materials, requiring special welding materials and technology.

2. Water corrosion: weathering steel is not stainless steel. If there is water in the concave of the weathering steel, the corrosion rate will be faster, so it must be drained.

3. Salt-rich air environment: Weathering steel is more sensitive to salt-rich air environments such as Hawaii. In this environment, the surface coating may not be able to prevent further oxidation inside.

4. Fading: The rust layer on the surface of weathering steel will cause the surface of objects near it to rust.