| 학회 | 한국재료학회 |
| 학술대회 | 2011년 봄 (05/26 ~ 05/27, 제주 휘닉스 아일랜드) |
| 권호 | 17권 1호 |
| 발표분야 | E. Structural Materials and processing Technology(구조재료 및 공정기술) |
| 제목 | Corrosion of Fe-2.25%Cr-1%Mo Steels at 600-800oC in N2/H2O/H2S atmospheres |
| 초록 | In modern branches of modern technology such as gasification and liquefaction of coal, chemical and petrochemical industries, metallic materials are exposed to sulfur-containing atmospheres at high temperatures. The sulfidation rates of most metals are well known to be much more severe than the oxidation rates. The corrosion in multicomponent sulfidizing-oxidizing atmospheres is even much more complex, and still not satisfactorily understood. In the case of an integrated gasification combined cycle (IGCC) that turns coal into synthesis gas (syngas), one of the main problems for IGCC is its corrosion occurring by syngas in a gasification unit, limiting operating temperatures and thus process efficiency. Hence, in this study, the ASTM T22 steel was corroded between 600 and 800oC for up to 30 hr in 1 atm of N2 gas, 1 atm of mixed N2/H2O gas, and 1 atm of mixed N2/H2O/H2S gas atmospheres in order to understand their corrosion behavior in the simulated IGCC gas atmospheres. The ASTM T22 steel is a low alloy carbon steel with 2.25Cr-1Mo. Oxidation prevailed in N2 and N2/H2O gases, whereas sulfidation dominated in N2/H2O/H2S gases. Their corrosion rates increased in the order of N2 gas, N2/H2O-mixed gas, and, much more seriously, N2/H2O/H2S-mixed gas atmosphere. T22 steel oxidized to Cr2O3 in N2 and N2/H2O gases, and sulfidized to FeCr2S4 in N2/H2O/H2S gases. Acknowledgement. This work was supported by the Power Generation & Electricity Delivery (20101020300460) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy. |
| 저자 | 김민정, 이동복, Zhao Chenguang |
| 소속 | 성균관대 |
| 키워드 | Fe-2.25%Cr-1%Mo Steels; H2S corrosion; integrated gasification combined cycle; ASTM T22 steel |
