High-corrosion-resistance weathering steel and preparation method and application thereof

The invention discloses high-corrosion-resistance weathering steel as well as a preparation method and application thereof. The invention relates to weathering resistant steel with high corrosion resistance, which comprises the following components in percentage by weight: 0.10 percent to 0.12 percent of C, 0.10 percent to 0.20 percent of Si, 1.0 percent to 1.8 percent of Mn, 0.075 percent to 0.115 percent of P, less than or equal to 0.0015 percent of S, 0.45 percent to 0.65 percent of Cr, 0.25 percent to 0.50 percent of Cu, 0.50 percent to 0.75 percent of Al, 0.07 percent to 0.12 percent of Ti, 0.01 percent to 0.04 percent of Nb, 0.0010 percent to 0.0025 percent of Ca, less than or equal to 0.0045 percent of N and the balance of Fe and other inevitable impurities. According to the embodiment of the invention, the relative corrosion rate of the weathering resistant steel can be improved, and meanwhile, the invested alloy cost can be reduced. 本申请公开了一种高耐蚀性的耐候钢和制备方法及其应用。一种高耐蚀性的耐候钢，以重量百分比计，包括：C：0.10％～0.12％，Si：0.1