In steel bridges, the corrosion damage occurs easily at sharp free edges of bottom flange, bolts, nuts and so on, because securing desired thickness of coating films is difficult at such locations. This study examined an accelerated exposure test and measured the thickness of the coating films to investigate corrosion resistant at different types of edge shapes. Test specimens were exposed to the accelerated corrosion environment conforming to Japanese Industrial Standards K5621 for 200 days for metallic coating and 400 days for paint coating. From the corrosion occurred at edges and the thicknesses of coating, anticorrosive performance of various coating systems was discussed. The paint coating system at the round edge had good performance compared with other shapes of edge. The metallic coating system also had good performance for all types of edge shapes.