| 摘要 |
<p>A cold rolled steel sheet which has an excellent corrosion resistance to sulfuric acid is disclosed. In this steel sheet, not only Cu but also a proper amount of Co is added so that the corrosion rate can be greatly lowered at a low temperature - low sulfuric acid concentration, thereby providing a cold rolled steel sheet having a superior corrosion resistance against sulfuric acid. The cold rolled steel sheet with an excellent sulfuric acid corrosion resistance includes in weight %: 0.15 % or less of C, 1.0 % or less of Si, 0.2~1.5 % of Mn, 0.03 % or less of S, 0.03 % or less of P, 0.01~0.1 % of Al, 0.2~1.0 % of Cu, 0.02~0.2 % of Co, and a balance of Fe and other unavoidable impurities.</p> |
