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低熔点氯化物沉积盐侵蚀是造成固态垃圾焚烧装置中热力构件加速退化的重要原因 ,本文总结了作者近期对几种金属材料在典型介质KCl/ZnCl2 中腐蚀的研究进展 .结果表明 ,材料在固态或熔融态的氯化物盐膜下均发生加速腐蚀 ,并在混合盐条件下腐蚀更为严重 ,合金的耐蚀性则随Cr含量的增加而恶化 ;材料在KCl-ZnCl2 熔盐中腐蚀时出现持续失重 ,其耐蚀性并随Cr含量的增加而得到改善 .在盐膜及熔盐两种腐蚀条件下 ,纯镍及镍基合金的耐蚀性均优于耐热钢 ,Fe-Al金属间化合物亦表现出很好的耐蚀性 .由热力学方面讨论了材料的腐蚀机制及合金化元素的作用
The corrosion of low melting point chloride deposits is an important reason for the accelerated degradation of thermal components in solid waste incineration plants. This paper summarizes the recent progress in the corrosion of several metal materials in a typical KCl / ZnCl2 solution. The results show that, Or molten chloride salt film accelerated corrosion occurred under the mixed salt conditions and more serious corrosion, corrosion resistance of the alloy with the Cr content of the deterioration of the material in the KCl-ZnCl2 molten salt corrosion occurs And its corrosion resistance is improved with the increase of Cr content.The corrosion resistance of pure nickel and nickel-based alloys is better than that of heat-resistant steel, Fe-Al metal The compounds also showed good corrosion resistance.The mechanism of corrosion and the role of alloying elements were discussed in terms of thermodynamics