Q355NH weather resistant steel plate is a kind of weathering steel plate made by special smelting process after adding specific trace elements into ordinary steel. This makes the surface of Q355NH weather resistant steel plate form a dense protective layer with strong adhesion, which has good corrosion resistance compared with ordinary steel plate. Q355NH weather resistant steel plate has the following weathering steel principles.
The protective film on the surface of Q355NH weather resistant steel plate can prevent the corrosion from spreading and developing, and protect the substrate under the rust layer to slow down the corrosion rate. The amorphous spinel oxide layer with thickness of 50 μm-100 μm formed between the rust layer and the substrate is dense and has good adhesion with the substrate metal. Due to the existence of this dense oxide film, the infiltration of oxygen 72 and water 27 into the steel substrate in 371 atmosphere is prevented by 180, which slows down the development of corrosion into the Q355NH weather resistant steel plate in depth and greatly improves the atmospheric corrosion resistance of the steel material.
Due to the special properties of Q355NH weather resistant steel plate, Q355NH weather resistant steel plate products have the advantages of corrosion resistance, long service time, labor saving and consumption reduction. Q355NH weather resistant steel plate is also a steel series that can be integrated into the new mechanism, new technology and new process of modern metallurgy to make its continuous development and innovation.
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