POSCO Holdings Inc.
ACID-RESISTANT STEEL SHEET AND MANUFACTURING METHOD THEREFOR

Abstract:

An acid-resistant steel sheet according to an embodiment of the present invention includes, by wt %, equal to or less than 0.1% of C (excluding 0%) and 2.0 to 4.0% of Si, and includes a remainder of Fe and inevitable impurities, and the content of Si of the surface portion by the inward depth of up to 10 .mu.m from the surface of the steel sheet is equal to or greater than 15 wt %.