Water vapour effects on corrosion of Fe–Cr and Fe–Cr–Ni alloys containing cerium and manganese in CO2 gas at 818 °C
Water vapour effects on corrosion of Fe–Cr and Fe–Cr–Ni alloys containing cerium and manganese in CO2 gas at 818 °C
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DOI：
10.1016/j.corsci.2014.08.029
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发表时间：
2014-12
影响因子：
8.3
通讯作者：
T. Nguyen;Jianqiang Zhang;D. Young
中科院分区：
文献类型：
--
作者：
T. Nguyen;Jianqiang Zhang;D. Young
将含0.1%Ce或2%Mn的Fe-9Cr、Fe-20Cr和Fe-20Cr-20Ni模型合金在818℃下暴露于Ar-20CO_2-20H_2O气体中，并与Ar-20CO_2反应的结果进行了比较。水蒸气加速了所有Fe-9Cr合金的腐蚀，加速了Fe-20Cr和Fe-20Cr-20Ni的剥离氧化。锰的加入阻止了铁素体合金的脱落，延缓了奥氏体相的脱落，但对Ce没有影响。除含锰合金外，所有合金均同时进行渗碳处理。从鳞片相组成的角度讨论了锰对高铬合金的有利作用。
Model alloys Fe–9Cr, Fe–20Cr and Fe–20Cr–20Ni (wt.%) with 0.1% Ce or 2% Mn were exposed to Ar–20CO2–20H2O gas at 818 °C, and the results compared with those of reaction with Ar–20CO2. Water vapour accelerated the corrosion of all Fe–9Cr alloys, and hastened the onset of breakaway oxidation for Fe–20Cr and Fe–20Cr–20Ni. Manganese additions prevented breakaway of the ferritic alloy, and retarded it for the austenitic, but cerium had no effect. All alloys except Mn-bearing variants were simultaneously carburised. Beneficial effects of manganese on high chromium content alloys are discussed in terms of scale phase constitutions.