Oxidation of alloys for energy applications in supercritical CO2 and H2O
Oxidation of alloys for energy applications in supercritical CO2 and H2O
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DOI：
10.1016/j.corsci.2016.03.018
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发表时间：
2016-08
影响因子：
8.3
通讯作者：
G. Holcomb;C. Carney;Ö. Doğan
中科院分区：
文献类型：
--
作者：
G. Holcomb;C. Carney;Ö. Doğan
为了促进超临界CO2（sCO2）电厂的发展，比较了奥氏体不锈钢和镍基合金在sH2O和sCO2中的氧化行为。实验在730°C/207 bar （sCO2）和726°C/208 bar （sH2O）下进行。ni基合金在sco2中的含量随压力变化不大。ni基合金在sH2O中的腐蚀速率增加，抛物线速率常数的对数与压力成正比。细晶奥氏体不锈钢在sco2和sH2O中对压力的保护作用都较弱，因为致密的保护铬垢被生长更快的富铁氧化物垢所取代。
To facilitate development of supercritical CO2(sCO2) power plants, a comparison of the oxidation behavior of austenitic stainless steels and Ni-base alloys in sH2O and sCO2were made. Experiments were conducted at 730 °C/207 bar (sCO2) and 726 °C/208 bar (sH2O). Ni-base alloys in sCO2did not exhibit much change with pressure. Ni-base alloys in sH2O had an increase in corrosion rate and the log of the parabolic rate constant was proportional to pressure. Fine-grain austenitic stainless steels in sCO2and sH2O were both less protective with pressure as the dense protective chromia scale was replaced with faster growing Fe-oxide rich scales.