Weathering steel, namely atmospheric corrosion resistance steel, is between ordinary steel and stainless steel low alloy steel series, weathering steel is made of plain carbon steel added a small amount of copper, nickel and other corrosion resistant elements, with high quality steel toughness, plastic extension, forming, welding and cutting, abrasion, high temperature, fatigue resistance and other characteristics; Weather resistance is 2~8 times of ordinary carbon steel, coating is 1.5~10 times of ordinary carbon steel. At the same time, it has the characteristics of rust resistance, corrosion resistance, life extension, thinning and consumption reduction, labor saving and energy saving.

Material properties and characteristics

Corten Steel originated from North America and is widely used in the production of railway carriages, containers and Bridges. Weathering steel is used as building facade material, in North America, Western Europe, Australia and Asia in Japan, South Korea have a certain history. A dense oxide layer of 50 ~ 100μm thick with good adhesion to the matrix metal is formed between the rust layer and the matrix metal by adding weather resistant elements such as copper, chromium and nickel. This special dense oxide layer has a stable and uniform natural rust red color. 1. Unique performance characteristics: First of all, it has outstanding visual expression. Corroded steel plates change over time. Its color lightness and saturation are higher than the general construction materials, so it is easy to stand out in the background of garden green plants. In addition, the rough surface produced by the corrosion of the steel plate gives the structure a sense of volume and mass. 2. It has a strong ability to shape. Like other metals, rusted steel plates are easy to shape into varied shapes and maintain excellent integrity, which wood, stone and concrete cannot achieve. 3. It also has a distinct ability to define space. Because the strength and toughness of steel plate is very large, it is not as much as the thickness limitation caused by the structure of masonry material. Therefore, very thin steel plates can be used to separate the space very clearly and accurately, making the site become concise and bright, but also full of power.

Product process and classification

(weathering steel ↑)

rust treatment process: rust stabilization treatment method is on the surface of weather resistant steel, with chemical method (rust liquid)), so that it produces rust stabilization of the skin film, is a kind of inhibition of the early use of steel by the outflow of rust, so that the stability. , artificial treatment generally 30 days. Usually, if the local damage is caused by the general coating treatment, the phenomenon of peeling paint is caused by rust, so as to maintain the appearance of painting. However, the rust stabilization treatment method is to slowly dissolve the skin film, so that the rust stability, gradually expand to all, covering a layer of skin film on the surface of the steel, without maintenance. 1. The first stage: the genuine weathering steel began to grow small rust spots, the rust spots of ordinary steel plate is relatively loose, some of the rust treatment is poor and even rust skin; 3. The second stage of long rust steel plate: the rust water of genuine weathering steel is less, and the rust point is smaller and thick; The rust water of ordinary steel plate is more, and the rust point is larger and thin. Ordinary steel plate rust column, tear marks are more serious, the bottom of the workpiece has black signs; 4. The third stage of long rust steel plate: the genuine weathering steel has a clear and dense rust core layer, which is closely adhered to a protective layer. It is almost impossible to remove rust by hand. Ordinary steel plate rust more, and even the whole piece of rust peeling, rust wear. Genuine weathering steel is biased to reddish brown, ordinary steel plate is biased to dark color.

(Color change of weathering steel ↑)

Construction and installation of nodes

Modern weathering steel building curtain wall (3MM) and aluminum plate exterior wall installation is similar at present, thick layer (5MM and above) weathering steel plate curtain wall adopts unit hanging mode. Landscape and some simple devices, mostly using direct welding process. Pay attention to the following: 1. Corrosion of welding points: The oxidation rate of welding points must be the same as that of other materials, which requires special welding materials and techniques. 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 do a good job of drainage. 3. Salty air environment: weathering steel is more sensitive to such salty air environment in Hawaii. In such an environment, a protective coating may not prevent further oxidation within. 4. Fading: The rust layer on the surface of weathering steel can cause the surface of objects near it to become rusty.