What is the characteristic of Corten steel?

   Corten steel, also known as atmospheric corrosion resistant steel, is a kind of low-alloy steel made by adding a certain amount of alloy elements to ordinary steel. The main alloy components are Cu, P, Cr, Ni and other elements. Weathering steel is characterized by its ability to resist corrosion under natural atmospheric conditions. Corrosion of steel is one of the main causes of steel structure damage, corrosion loss is also considerable, it is reported that the annual corrosion loss in North America is also considerable, it is reported that the annual corrosion loss in North America accounts for 20% of the annual production of steel, in Canada annual corrosion loss of $600 million. The way to solve the corrosion prevention problem of large steel structure is generally to increase the corrosion allowance and paint with rust prevention paint. The former will cause material waste, the latter because of the need for regular maintenance recoating, resulting in higher maintenance costs, and sometimes affect the normal use. Another method is to use metal coating in the structure for protection, mainly hot dip plating or spraying zinc or aluminum, using the cathodic protection performance of the coated metal to extend the life of the steel structure. However, the application of metal coating also has some problems, such as high cost, environmental pollution, difficulty in large component application, and difficulty in welding.