Hot Corrosion and Protection of a Cast Nickel-Base Superalloy for Gas Turbine 840816
The corrosion products on both corroded blades and corroded specimens as made of cast nickel-base superalloy and coated with alumlnide are eximined by optical microscope, x-ray diffraction, SEM, EDXA and chemical analyses to explore failure mechanism. It is shown that sulphurization and hot corrosion caused by molten salt and it is suggested that the mechanism of hot corrosion of low-chromium, refractory metal-rich superalloy is the synergism of sulphidation, basic fluxing and acidic fluxing. A diffusion-type slurry coating and a sintered slurry coating based on aluminium-silicon exhibit a much better hot corrosion resistance than conventional pack aluminide coating.
Citation: Xuchang, X., Zhonglin, Y., Fengjun, W., and Jiyuan, X., "Hot Corrosion and Protection of a Cast Nickel-Base Superalloy for Gas Turbine," SAE Technical Paper 840816, 1984, https://doi.org/10.4271/840816. Download Citation
Author(s):
Xiao Xuchang, Yang Zhonglin, Wu Fengjun, Xiong Jiyuan
Affiliated:
Institute of Aeronautical Materials, Beijing, China
Pages: 12
Event:
Annual Aerospace/Airline Plating and Metal Finishing Forum and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
20th Annual Airline Plating and Metal Finishing Forum Proceedings-P-145, SAE 1984 Transactions-V93-84
Related Topics:
Corrosion
Coatings, colorants, and finishes
Chemicals
Powder metallurgy
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