Hot corrosion phenomena of Nb-Ti-Si based alloy and its silicide coating induced by different corrosive environments at 900 degrees C
Hot corrosion phenomena of Nb-Ti-Si based alloy and its silicide coating induced by different corrosive environments at 900 degrees C
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900℃不同腐蚀环境下Nb-Ti-Si基合金及其硅化物涂层的热腐蚀现象
DOI：
10.1016/j.ceramint.2018.01.238
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发表时间：
2018
影响因子：
5.2
通讯作者：
Guo Xiping
中科院分区：
文献类型：
--
作者：
Qiao Yanqiang;Kong Jianping;Guo Xiping
研究了Nb-Ti-Si基合金及其硅化物涂层在90 0 °C不同熔盐中的热腐蚀行为。结果表明，K2SO4和Na2SO4对合金的腐蚀性能有不利影响，但对涂层几乎没有影响。然而，氯化钠加速了合金和涂层的腐蚀过程，表现出最高的膜厚和质量增益。主要腐蚀产物为含钠或含钾氧化物、二氧化钛和无定形硅酸盐。讨论了合金和涂层在不同腐蚀环境中的反应性。
This study aims to elucidate the hot corrosion behavior of Nb-Ti-Si based alloy and its silicide coating in different molten salts at 900 °C. The results show that both K2SO4and Na2SO4had detrimental effect on the corrosion performance of the alloy, but almost no effect on the coating. However, NaCl accelerated the corrosion process for both the alloy and coating, showing highest scale thickness and mass gain. The main corrosion products consist mainly of Na or K containing oxides, TiO2and amorphous silicate. The reactivity of the alloy and the coating in different corrosive environments is discussed.