| Abstract |
| Fe-(4.8, 9.2, and 14.3 wt%)Al alloy were significantly corroded at 600 and 700 ℃ for up to 60 h in a mixed gas consisting of 0.031 atm of H2O, 0.0044 atm of H2S, and balance of N2. The Fe-4.8Al alloy corroded rapidly, forming outer FeS scales and inner (FeS, Fe2AlO4)-mixed scales. These were formed because the sulfidation of Fe to form FeS in the outer scales facilitated the oxidation of Al to Fe2AlO4 in the inner scales. The Fe-(9.2, 14.3)Al alloys formed much thinner scales, which consisted primarily of outer FeS scales and inner Al2O3 scales that effectively provided corrosion resistance.(Received May 9, 2014) |
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| Key Words |
| metals, casting, oxidation, scanning electron microscopy, H2S corrosion, H2O corrosion |
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