| 초록 |
Fe-(4.8, 9.2, 14.3) wt.%Al alloys were corroded in Na2SO4 salt at 800 and at 900oC, and their hot corrosion behavior was studied. With the increase in the amount of Al, the corrosion resistance increased due mainly to the formation of Al2O3. With the increase in the temperature, the corrosion resistance drastically decreased owing to the rapid scaling and dissolution of scales into the salt. The corrosion products were Fe2O3, Fe3O4, FeO, α-Al2O3, NaAlO2, and FeAlO4. Fe-4.8Al corroded much faster than Fe-(9.2, 14.3)Al. Oxidation prevailed during corrosion so that iron oxides and/or α-Al2O3 were the major corrosion products. Acknowledgement. This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy. (No.20143030050070) |
