09CuPCrNi-A is a high-strength weathering steel. Among them, the combination of Cu and P can resist atmospheric corrosion. In addition, there are Cr and Ni, both of which are used in stainless steel. Weathering steel (that is, atmospheric corrosion resistant steel) is a series of low-alloy steels between ordinary steel and stainless steel at a low price and good quality. After incorporating modern metallurgical new mechanisms, new technologies and new processes, it can achieve sustainable development and innovation.
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Rolling of steel plates is the core of the entire steel rolling production process. The billet is deformed by rolling. The rolling process plays a decisive role in product quality. The quality requirements of rolled ASTM A573 steel sheet products include the three aspects of product geometry and dimensional accuracy, internal organization and performance, and product finish. Finishing: It is the last process in the ASTM A573 steel sheet rolling process, and it is also a more complicated process. It plays a final role in guaranteeing the quality of the product.
At the initial stage of corrosion, the rust layer on the surface of weathering steel is denser than that of carbon steel, ASTM A573 steel sheet, and there are relatively few cracks and holes. After 25 days, delamination occurs in some parts of carbon steel and weathering steel, and there is no difference in corrosion products, mainly due to the role of alloy elements in the rust layer. The precipitation of Cu and Cr alloy elements in the weathering rust layer can resist the invasion of moisture and harmful ions in the atmosphere, and further corrosion of steel and base metal can be prevented, so as to achieve the effect of atmospheric corrosion resistance.
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