| Hot Corrosion of Plasma Sprayed Coatings for Waste Gas Turbine Blades |
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| 作者单位： | Liao Xiaoning，Ye Ruizeng Lu Fanxiu Sun Jingui Zhang Naiping Dept. of Material ScienceWunan Institute of Metallurgy |
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| 摘 要： | High temperature corrosion tests in 75%Na2SO4-25%. NaCl molten salt have been conducted on waspalloy specimens plasma sprayed with Co-Cr-B-Si, Ni-Cr-B-Si-hCr3C2, X-40, X-40 + TiC and Ni/Al + Al2O3 coatings, test coupons were exposed isothermally at 750℃up to 200 h. After the corrosion tests, each sample was examined by OM, SEM and EMPA. It was found that X-40, X-40 + TiC and Ni/Al + Al2O3 were violently corroded by the molten salt due to cracking and spalling of the coatings, whereas the Co-Cr-B-Si and Ni-Cr-B-Si + Cr3C2 exhibited superior corrosion resistance, which were thought to be related to the formation of chromium and silicon oxide film. A possible corrosion mechanism had been proposed and it is suggested that the excellent corrosion resistance and high hot-hardness of the two B-Si containing coatings may be of significance for applications in petroleum refining industry as protective coatings of power generating turbine blades which are used under severe corrosion/erosion conditions.
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Hot Corrosion of Plasma Sprayed Coatings for Waste Gas Turbine Blades |
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| Liao Xiaoning,Ye Ruizeng Lu Fanxiu Sun Jingui Zhang Naiping Dept. of Material ScienceWunan Institute of Metallurgy. Hot Corrosion of Plasma Sprayed Coatings for Waste Gas Turbine Blades[J]. Journal of University of Science and Technology Beijing, 1989, 0(6) |
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| Authors: | Liao Xiaoning Ye Ruizeng Lu Fanxiu Sun Jingui Zhang Naiping Dept. of Material ScienceWunan Institute of Metallurgy |
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| Abstract: | |
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| Keywords: | hot corrosion coating turbine blade |
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