Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (40권5호 219-224)

High Temperature SO2-gas Corrosion of Fe-18%Cr-10%Ni Steels for Coal-fired Power Plant

화력발전소용 Fe-18%Cr-10%Ni 강의 고온 SO2 가스 부식

이동복;
Lee, Dong-Bok;

성균관대학교 신소재공학부;
School of Advanced Materials Science and Engineering, Sungkyunkwan University;

DOI : 10.5695/JKISE.2007.40.5.219

Abstract

The corrosion characteristics of Fe-18Cr-10Ni steels were studied between $600^{circ}C$ and $1000^{circ}C$ in Ar+(0.2, 1)%$SG_2$ gas for up to 300 hr in order to employ Fe-18Cr-10Ni steels in the coal-fired power plants. The corrosion resistance of Fe-18Cr-10Ni steels was good due mainly to the high amount of Cr, which formed $Cr_2O_3$ from the initial corrosion stage. Fe in the steels corroded to mainly $Fe_2O_3$ and $Fe_3O_4$. Ni was not susceptible to corrosion under the current corrosion condition. Relatively thin, single-layered scales formed.

Keywords

$SO_2-gas$ corrosion;Steel;Chromium;Nickel;Sulfidation;Oxidation;