目前 ,评价金属热稳定性时 ,要求研究的试样在工作温度区长时间保温 ,用试样质量增重 (减少 )比、形成氧化层厚度、均匀腐蚀深度、质量真实增加 (损失 )速度来评价腐蚀损坏程度。有防护涂层试样得到的性能可同没有镀层的试样性能进行比较。在高温下进行涂层耐久试验 ,因高温可 At present, when evaluating the thermal stability of metal, the samples to be studied are required to be kept in the working temperature zone for a long time, and the thickness of the oxide layer, the uniform corrosion depth and the real mass increase (loss) speed Evaluate the extent of corrosion damage. The properties obtained with the protective coating samples can be compared with those of uncoated samples. Coating durability test at high temperature, due to high temperature