Long-Term High-Temperature Oxidation of Alloys for Intermediate Heat Exchangers

作     者：C. Cabet B. Duprey 

作者机构：CEA DEN DPC SCCME Laboratory of Non Aqueous Corrosion Gif-sur- Yvette F-91191 France 

出 版 物：《Journal of Energy and Power Engineering》 (能源与动力工程（美国大卫英文）)

年 卷 期：2011年第5卷第10期

页      面：942-950页

学科分类：080705[工学-制冷及低温工程] 080503[工学-材料加工工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：High temperature oxidation nickel alloy helium very high temperature reactor lifetime prediction. 

摘      要：Alloy 617 is the reference candidate material for high temperature components of gas-cooled reactors, like intermediate heat exchangers. Oxidation tests were performed with two heats of Alloy 617 up to 5000 hours at 950℃ under a simulated helium-cooled reactor environment. Post-treatment examination showed that all materials actually oxidized during the tests with the growth of a surface chromium oxide scale that includes titanium, formation of a carbide-depleted zone underneath the surface, and internal oxidation of aluminum. These oxidation-related phenomena are in good agreement with the data published in the 1980s for Alloy 617 in equivalent testing conditions and were used to assess the alloy corrosion performances. The oxidation kinetics was globally parabolic corresponding to the growth of the external oxide as well as to internal oxidation. In the given test environment, the parabolic rate constants are 0.00090 and 0.00058 mg^2·c^-4m·h^-1 for the two heats of Alloy 617.