S355K2G1W weathering steel plate will first be corroded like ordinary steel. In the later stage of corrosion, when the corrosion reaches a certain time, due to the enrichment of trace elements such as copper and phosphorus on the surface of S355K2G1W weathering steel plate, a dense amorphous rust layer structure will be formed and firmly bonded with the substrate. The stable rust layer can resist the invasion of water and harmful ions in the atmosphere to a certain extent and prevent further corrosion of base metal.
Weatherability usually means that steel plates work well in warm conditions in the south, but materials in low temperature regions (such as the Arctic) are brittle and prone to cracking. S355K2G1W weathering steel plate is required, which requires that S355K2G1W weathering steel plate has good toughness at low temperature under the premise of the same strength, usually at -46 ℃, Akv 21J or 27j. High quality steel after degassing refining and adding a small amount of alloying elements can meet the requirements of S355K2G1W weathering steel plate.
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