Corten steel, also known as corrosion-resistant steel and weathering steel, is a low-alloy steel series between ordinary steel and stainless steel. In natural climates, weather-resistant steel makes steel The material forms a dense oxide layer between the rust layer and the substrate. Due to the existence of this layer of dense oxide film, it prevents oxygen and water in the atmosphere from penetrating into the steel substrate, and slows down the development of corrosion into the steel material, thereby Improve the atmospheric corrosion resistance, and the atmospheric corrosion resistance is 2 to 5 times that of ordinary carbon steel.