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The principle of weathering steel plate's resistance to atmospheric corrosion
In the early stage of corrosion, the rust layer formed on the surface of weathering steel plate is denser than that of carbon steel, with relatively fewer cracks and holes; after 25 days, both carbon steel and weathering steel have local stratification, and there is no difference in corrosion products.
Dec 17,2024
In the early stage of corrosion, the rust layer formed on the surface of weathering steel plate is denser than that of carbon steel, with relatively fewer cracks and holes; after 25 days, both carbon steel and weathering steel have local stratification, and there is no difference in corrosion products. The difference is mainly due to the role of alloy elements in the rust layer. Cu and Cr alloy elements are precipitated in the rust layer of weathering steel, which gather in the cracks to resist the invasion of water vapor and its harmful ions in the atmosphere and prevent further corrosion of the base metal. Thus, it achieves the effect of atmospheric corrosion resistance!
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