| REN Xin.Hot Corrosion Behavior of an Ion Plating NiCrAIY Coating with Alununizing[J],37(4):1-3 |
| Hot Corrosion Behavior of an Ion Plating NiCrAIY Coating with Alununizing |
| Received:February 25, 2008 Revised:August 10, 2008 |
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| DOI： |
| KeyWord:Aluminizing Ion plating Hot corrosion NiCAIY |
| Author | Institution |
| REN Xin |
Department of Materials Science and Engineering, Liaoning Technical University, Fuxin , China |
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| Abstract: |
| A NiCrAIY coating was deposited on a Ni-based superalloy by ion plating. Post-aluminizing was performed on the coating to improve the corresponding high-temperature properties. Hot corrosion behaviors in the presence of 750/o Na2S04 +250/o NaCl film at 850℃ of the coatings with and without aluminizing have been investigated. In 250/o NaCl +750/o Na2S04 molten salt at 850℃ , Cr203 scale formed on NiCrAIY coating at 40h, while at the same time a single layer of a-Al203 scale formed on the coating with post-aluminizing. The main oxide of Al203 remained on the surface of the coating with post-aluminizing, which obviously increased the resistance to hot corrosion of the coating. |
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