中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 16 No. 3 June 2006 |
（1. Department of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China;
2. State Key Laboratory for Corrosion and Protection, Institute of Metal Research,Chinese Academy of Sciences, Shenyang 110016,China;
3. Shenyang National Laboratory for Materials Sciences,Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China）
Abstract:Magnetron-sputter deposition was used to produce Ti-48Al-8Cr-2Ag coating on a cast alloy substrate with the same composition. Hot corrosion was carried out in molten (Na,K)2SO4 and Na2SO4+NaCl at 900 ℃. The sputtered nanocrystalline coating shows much better hot-corrosion resistance in molten (Na,K)2SO4 as a result of the formation of a continuous and compact Al2O3 scale. The nanocrystallization of TiAlCrAg alloy prolongs the incubation of breakaway corrosion and improves the hot-corrosion resistance of TiAlCrAg alloy in molten Na2SO4+NaCl. The relevant corrosion mechanism was discussed.
Key words: Ti-48Al-8Cr-2Ag alloy; magnetron sputter; nanocrystallization; hot corrosion; oxide scale
