METHOD OF PROTECTION AGAINST CORROSION OF A STEEL DETAIL, MANUFACTURED FROM AUSTENITIC OR SEMI-SUSTAINED STEEL, DURING SULFURIC ACID ACQUISITION

摘要

This invention relates to a method for the protection against corrosion of steel parts made of austenitic or semi-austenitic steel during the production of sulfuric acid. To improve the corrosion resistance of steel parts that are in contact with sulfuric acid, it is proposed to use austenitic or semi-austenitic steel, the Cr content of which is in the range from 15 to 31 wt.%, And the Ni content is in the range from 9 to 60 wt.% and where the ratio of the quantities of chemical elements (Cr + Si) / (Ni + Mo) is in the range from 0.9 to 1.9 or where the ratio of the quantities of chemical elements Cr / (Ni + Mo) is in the range from 0.8 to 1 , 5, and additionally provide this steel part with protection against anodic corrosion. People application was published together with the international search report.