What is weather resistant steel

Weathering steel characteristics

　　The protective rust layer corrosion resistance, can be used for low alloy structural steel manufacturing, vehicle bridge, tower, steel structure container etc.. Compared with ordinary carbon steel, weathering steel has better corrosion resistance in atmosphere. Compared with stainless steel, weathering steel only trace alloy elements, such as phosphorus, copper, chromium, nickel, molybdenum, niobium, vanadium, titanium and other alloy elements, the total amount of only a few percent, while not as stainless steel, up to 10 percent, so the price is relatively low.

　　Weathering steel principle

　　Adding phosphorus, copper, chromium, nickel and other trace elements in steel, so that the formation of dense and protective film adhesion strong corrosion to steel surface, hinder the diffusion and development, protect the substrate rust layer below, in order to reduce the corrosion rate. Formed between the rust layer and the substrate is about 50 m ~ 100 m thick amorphous spinel oxide layer and the metal substrate and dense adhesion, because this layer of dense oxide film, prevent atmospheric oxygen and water to seep into the steel matrix, slows down the corrosion to the steel material depth development can greatly improve the corrosion resistance of atmospheric steel materials. Weathering steel is thinning, can use bare use or simplified coating, and the corrosion products and labor saving, Yanshou upgrading of the steel, but also a modern metallurgy can be integrated into the new mechanism, new technology, new technology and make the steel its continuous development and innovation.

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