Abstract: Periodic wet/dry corrosion tests were conducted on the self-made Sb-Al composite added Cr-Ni-Cu series weathering steel (1^#) and Al-containing Cr-Ni-Cu series weathering steel (2^#), and commercially available S450AW Sb-containing weathering steel, Q450EWR1 high Cr weathering steel and Q355B low alloy steel. The corrosion resistance of the five steels and the structure and phase composition of the surface rust layers were compared and studied. The influence of Sb and Al elements on the corrosion resistance was analyzed. The results show that the surface rust layers of the four weathering steels contained high content protective phases including α-FeOOH, Fe₃O₄ and α-Fe₂O₃; the corrosion resistance was better than that of Q355B low alloy steel. The inner rust layer of 1^# steel was enriched with Si, Cr, Cu, Sb, and Al elements, and the inner rust layer of 2^# steel was enriched with Si and Al elements; the enrichment of these elements improved the corrosion resistance of the inner rust layer. The corrosion resistance of 1^# steel, 2^# steel and S450AW steel was similar, indicating that the composite addition of Sb and Al could ensure the good corrosion resistance of weathering steels while reducing the single addition of Al, Sb, and Cr elements.