Transport properties of sulfide scales and sulfidation of metals and alloys

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

“…Such was attributed to the fast growth rate of highly nonstoichiometric Fe 1-x S (x=0-0.2). This grew fast by the outward diffusion of Fe 2+ ions, leaving Kirkendall voids behind [3,7]. Hydrogen also assisted the cracking and void formation.…”

“…A low carbon steel plate with a nominal composition of Fe-0.04C-0.15Mn-0.02Si-0.012P-0.05Cu in wt.% was cut to a size of 10×10×3 mm 3 , ground up to a 1500-grit finish with abrasive papers, ultrasonically cleaned in acetone, and corroded at 500, 600, 700 and 800 in air, Ar/1%SO 2 -, and Ar/0.1%H 2 S-mixed gas. The purity of Ar, SO 2 , and H 2 S gas was 99.9999, 99.95, and 99.95%, respectively.…”

“…SO 2 is also the most common pollutant in rural or urban atmospheres. If sulfide scales were formed, carbon steels became seriously attacked, because most sulfides were fragile, nonadherent, and grew fast [3][4][5][6]. H 2 S is much more corrosive than SO 2 , because of hydrogen that embrittles the metal and accelerates corrosion rates.…”

Corrosion of Fe-9%Cr-1%Mo Steel at 600 and 700℃ in N2/(0.5, 2.5)%H2S-mixed Gas

“…The H 2 S gas, which is produced as the by-product during processing, dissociates into sulfur and hydrogen, and reacts with the steel according to the reaction; H 2 S+Fe → FeS+H 2 [4,5]. Generally, sulfides are highly nonstoichiometric, and ionic diffusion in sulfides is hence faster than that in the corresponding oxides [6,7]. Sulfidation is therefore a quite serious problem.…”

High-Temperature Corrosion of T92 Steel in N2/H2O/H2S-Mixed Gas

“…This led to the development of the ASTM T92 steel (Fe-9Cr-1.8W-0.5Mo-0.45Mn-0.2V-0.06Si-0.05Nb-0.03B-0.07C in wt.%) 1) . For commercial applications, it is important to study the high-temperature corrosion behavior of T92 steel in N 2 /H 2 O/H 2 S-mixed gas, because water vapor and H 2 S gas are frequently entrapped in the processing gas.…”