采用X-射线衍射、扫描电镜及能谱等测试手段,研究了一种镍基单晶合金在75％ Na2SO4+25％ K2SO4熔盐中的热腐蚀行为,该熔盐θ为900℃.结果表明,镍基单晶合金热腐蚀严重,出现严重的内硫化和内氧化；外层腐蚀产物由Al2O3 、Cr2O3 Ni2Cr2O4和Co2Cr2O4相组成,内层为Al2O3和CrS；镍基单晶合金表面形成的氧化物发生碱性溶解.
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