Effect of SiO2 barrier scale prepared by pre-oxidation on hot corrosion behavior of MoSi2-based coating on Nb alloy
Effect of SiO2 barrier scale prepared by pre-oxidation on hot corrosion behavior of MoSi2-based coating on Nb alloy
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DOI：
10.1016/j.corsci.2020.109051
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发表时间：
2020-11
影响因子：
8.3
通讯作者：
Le Sun;Q. Fu;Jia Sun
中科院分区：
文献类型：
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作者：
Le Sun;Q. Fu;Jia Sun
Using pre-oxidation at 1500 °C for 10 h, a continuous SiO2barrier scale was fabricated on MoSi2-based/NbSi2coating of Nb alloy expected to resist hot corrosion with Na2SO4at 1000 °C. No obvious corrosion occurred for 2 h, while the corroded products including Na2Si2O5, Na2MoO4and SiO2deposits were generated respectively for 4 h and 8 h. The degradation of SiO2scale triggered an evident increase in surface roughness. Due to a slow reaction rate, SiO2scale can serve as a barrier isolating from Na2SO4salt to alleviate the degradation of MoSi2-based coating effectively.
