The corrosion behavior of a weathering steel SPA-C and two acid resistance steels( S-TEN1 and ND) in sulfuric acid solution was investigated by using potentiodynamic polarization and weight loss measurement techniques.Both potentiodynamic polarization and weight loss measurement tests indicated that corrosion resistance of these three alloy steels was as follows: ND ≈ S-TEN1 > SPA-C.Surface analysis of the corroded samples conducted after the immersion test indicated that two layers were formed on the substrates,with the outer layer comprising Fe SO_4·H_2O and the inner layer mainly comprising iron oxides.The addition of Cu,Cr,and Sb refined the corrosion products and improved the adhesion ability between the rust layer and the substrate. The corrosion behavior of a weathering steel SPA-C and two acid resistance steels (S-TEN1 and ND) in sulfuric acid solution was investigated by using potentiodynamic polarization and weight loss measurement techniques. Bothotropodynamic polarization and weight loss measurement tests indicated that corrosion resistance of these three alloy steels was as follows: ND ≈ S-TEN1> SPA-C.Surface analysis of the corded samples conducted after the immersion test indicated that the two layers were formed on the substrates with the outer layer comprising Fe SO_4 · H_2O and the inner layer mainly comprises iron oxides. The addition of Cu, Cr, and Sb refined the corrosion products and improved the adhesion ability between the rust layer and the substrate.