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Carbon Depositions within the Oxide Scale and its Effect on the Oxidation Behavior of Low Alloy Steel in Low (0.1 MPa), Sub-(5 MPa) and Supercritical (10 MPa) CO2 at 550°C
Corrosion Science ( IF 8.3 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.corsci.2020.108950
Mohammad Hassan Shirani Bidabadi , Somrerk Chandra-ambhorn , Abdul Rehman , Yu Zheng , Chi Zhang , Hao Chen , Zhi-Gang Yang

Abstract The oxidation behavior of CrMoV steel in 0.1, 5, and 10 MPa CO2 was studied at 550 °C for 500 h. Reaction rates decreased from 0.1 to 5 MPa, and breakaway occurred sooner with increasing pressure. Amorphous carbon was identified within the inner layer in all CO2 pressure values, while graphite was mainly detected under 5 and 10 MPa. Carbon deposition may link to the formation of Fe- and (Fe, Ni)-rich M3C carbides at the oxide/steel interface, which catalyzed the Boudouard reaction. A high external CO2 pressure and the oxidation of Cr-rich carbides within the steel may favor carbon depositions.

中文翻译:

氧化皮内的碳沉积及其对低合金钢在低 (0.1 MPa)、亚 (5 MPa) 和超临界 (10 MPa) CO2 中 550°C 氧化行为的影响

摘要 研究了 CrMoV 钢在 0.1、5 和 10 MPa CO2 中的氧化行为,温度为 550 °C,时间为 500 h。反应速率从 0.1 MPa 降低到 5 MPa,随着压力的增加,分离发生得更快。在所有 CO2 压力值下,在内层中都发现了无定形碳,而石墨主要在 5 和 10 MPa 下检测到。碳沉积可能与在氧化物/钢界面处形成富含 Fe 和 (Fe, Ni) 的 M3C 碳化物有关,后者催化了 Boudouard 反应。高外部 CO2 压力和钢中富铬碳化物的氧化可能有利于碳沉积。
更新日期:2020-12-01
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