After adding trace elements such as phosphorus, copper, chromium, nickel to the steel, weathering steel material forms a dense and strong protective film on the surface of the steel, hinders the diffusion and development of rust, protects the substrate under the rust layer, and slows down its corrosion rate.
The amorphous spinel oxide layer formed between the rust layer and the substrate about 50 μm to 100 μm thick is dense and has good adhesion to the substrate metal. Due to the presence of this dense oxide film, it prevents oxygen and oxygen in the atmosphere. The penetration of water into the steel matrix slows down the development of rust to the steel material and greatly improves the ability of the steel material to resist atmospheric corrosion.
Weathering steel is a steel system that can be used for thinning, bare use or simplified coating, which can make products corrosion-resistant and prolong life, save labor and reduce consumption, and upgrade. It is also a steel system that can be integrated into modern metallurgical new mechanisms, new technologies and new processes. Continuous development and innovation of the steel system.