Research on Hot Corrosion Behavior of DZ40M and K452 Superalloys in NaCl Molten Salt

The corrosion of cobalt-based DZ40M and nickel-based K452 superalloy at 900 °C was investigated by NaCl salt coating. Accordingly, the differences in hot corrosion behavior were analyzed considering the development methods and elementary composition by comparing the two alloys’ failure. Then, the co...

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Detalles Bibliográficos
Autores principales: Wan, Lei, Zhang, Zeyu, Wang, Wenquan, Xue, Yunpeng, Shen, Jubao, Sun, Tao, Sun, Haiou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8874360/
https://www.ncbi.nlm.nih.gov/pubmed/35208048
http://dx.doi.org/10.3390/ma15041512
Descripción
Sumario:The corrosion of cobalt-based DZ40M and nickel-based K452 superalloy at 900 °C was investigated by NaCl salt coating. Accordingly, the differences in hot corrosion behavior were analyzed considering the development methods and elementary composition by comparing the two alloys’ failure. Then, the corrosion mechanism induced by NaCl was proposed by comparing oxidation and hot corrosion behavior. The relatively continuous Al(2)O(3) and TiO(2) formed on K452 superalloy with higher content of Al and Ti have lower solubility and less damage in Na(2)O. Thus, the hot corrosion rate of K452 is lower than that of DZ40M with higher content of C, Cr, and W.

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