Hot-Corrosion Resistance of a Sputtered K38G Nanocrystalline Coating in Molten Sulfate at 900°C |
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Authors: | Geng S. Wang F. Zhu S. Wu W. |
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Affiliation: | (1) State Key Laboratory for Corrosion and Protection, Institute of Metal Research, The Chinese Academy of Sciences, Wencui Road 62, Shenyang, 110016, China |
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Abstract: | The hot-corrosion behavior of a nanocrystalline coating of K38G alloy, prepared by magnetron sputtering and cast K38G in molten 75 wt.% Na2SO4+25 wt.% K2SO4 at 900°C was studied. The coating eliminated internal sulfidation during the early stage of corrosion as a result of the formation of a continuous and compact Al2O3 scale. The nanocrystallization of K38G alloy prolonged the incubation of breakaway corrosion and improved the corrosion resistance of K38G. The relevant corrosion mechanism is discussed. |
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Keywords: | K38G alloy sputtering coating molten sulfate corrosion |
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