Corrosion-resistant weathering steel—weathering steel sheet

Weathering steel sheet characteristics
Weather-resistant steel plate refers to low-alloy steel with maintenance rust layer and air corrosion resistance, which can be used to manufacture steel frame structures such as cars, highway bridges, towers, and shipping containers. Compared with ordinary carbon steel, weathering steel sheet has better corrosion resistance in the air. Compared with stainless steel plates, aluminum alloy elements such as phosphorus, copper, chromium, nickel, molybdenum, niobium, vanadium, and titanium can only be analyzed in trace amounts by weathering steel plates. The total output of aluminum alloy elements accounts for only a few percent.
 

The reason of weathering steel corrosion resistance

The key to weathering steel is corrosion resistance, and good welding characteristics. These thick steel plates and sheets are now large and medium-sized plate plants with relatively complete technical capabilities. According to the addition of aging-resistant elements, the steel raw material generates a layer of high-density metal oxide layer with a thickness of about 50 to 100 μm and adhesion to the conventional metal material between the rust layer and the conventional. Because of the existence of this high-density metal oxide film, it blocks the normal penetration of oxygen and water in the air into the steel, alleviates the rusting trend toward the deep development of steel raw materials, and further improves the ability of steel raw materials to withstand air corrosion . Weather-resistant steel sheet has excellent resistance to air corrosion. Among them, the aluminum alloy element has decisive effects, including hindering the growth and development of the embroidered layer; crystals that delay embroidering; hindering cracks and shortcomings.