What is the principle of weathering steel?
After adding phosphorus, copper, chromium, nickel and other trace elements to steel, the steel surface to form a dense and strong adhesion of the protective film, hindering the spread of corrosion inward and development, to protect the substrate below the rust layer, in order to slow down its corrosion rate. In the rust layer and the substrate between the formation of about 50μm ~ 100μm thick amorphous spinel-type oxide layer dense and good adhesion with the base metal, due to the existence of this layer of dense oxide film, preventing the atmospheric oxygen and water to the steel substrate penetration, slowing down the rust to the deep development of steel materials, greatly improving the resistance of steel materials to atmospheric corrosion.
Weathering steel can be thinning use, bare use or simplify the coating, and make products corrosion resistance life extension, labor saving, upgrading steel, but also a modern metallurgy can be integrated into the new mechanism, new technology, new technology and make its sustainable development and innovation of the steel system.
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