Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (50권2호 85-90)

Corrosion of Carbon Steel with and without Aluminized Coating in (O, S, H)-containing Gases at 500-800℃


Lee, Dong Bok;Abro, Waheed Ali;Lee, Kun Sang;Abro, Muhammad Ali;


School of Advanced Materials Science & Engineering, Sungkyunkwan University;Department of Earth Resources and Environmental Engineering, Hanyang University;

DOI : 10.5695/JKISE.2017.50.2.85

Abstract

The carbon steel formed the thick, somewhat porous, loosely adherent iron oxide scale when oxidized at $500-800^{circ}C$ for 15 h in air. It formed the thicker, more porous, nonadherent scale consisting of FeS plus iron oxides in $Ar/1%SO_2$-mixed gas. It formed the much thicker, more porous, nonadherent scale consisting of FeS plus iron oxides in Ar/0.1% $H_2S$-mixed gas. However, the aluminized carbon steel formed the thin, protective $Al_2O_3$ surface scale even in $Ar/1%SO_2$-, and $Ar/0.1%H_2S$-mixed gas. Aluminizing drastically improved the corrosion resistance in (O, S, H)-containing gas.

Keywords

Carbon steel;Aluminizing;Oxidation;$SO_2$ corrosion;$H_2S$ corrosion;