STEEL HAVING EXCELLENT RESISTANCE TO CORROSION BY HYDROCHLORIC ACID AND SULFURIC ACID AND METHOD FOR MANUFACTURING THE SAME

摘要

A sulfuric acid hydrochloric acid resistant corrosion steel and manufacturing method thereof are provided to manufacture the steel with a superior in sulfuric acid and hydrochloric acid resistant anticorrosion property at the low temperature - low sulphuric acid concentration section within the desulfurization equipment. A sulfuric acid hydrochloric acid resistant corrosion steel comprises followings. The sulfuric acid corrosion resistance and welding property are degraded, if C content exceeds 0.15 weight%. When P content exceeds 0.02 weight%, the intensity increase effect can be expected but sulfuric acid resistance and complex anticorrosion property are lowered. Al is added for the deoxidation in order to suppress the generation of the crack in the continuous casting process. When considering sulfuric acid resistance and complex part type property, Cu is the element which it certainly has to be added. Sb improves the corrosion resistance by forming the corrosion product on the steel surface.