CeO_2薄膜对Fe-Cr合金的高温水蒸气氧化行为影响  

EFFECT OF CeO_2 COATIING ON OXIDATION BEHAVIOR OF Fe-Cr ALLOY IN WATER VAPOR

作　　者：李辛庚[1] 王学刚[1] 

机构地区：[1]山东电力研究院,济南250002

出　　处：《腐蚀科学与防护技术》2008年第3期157-161,共5页Corrosion Science and Protection Technology

摘　　要：研究了Cr含量为9mass％和19mass％的Fe—Cr合金表面沉积CeO2薄膜在600℃～770℃水蒸气中的氧化行为．结果表明，对9mass％Cr含量的Fe-Cr合金，沉积稀土薄膜并没有改变氧化膜结构和明显降低氧化速率．对于19mass％Cr含量的Fe-Cr合金，沉积稀土薄膜可促进Cr向外扩散和阻碍0向内扩散，合金表面形成连续的Cr氧化物，合金的氧化速率降低．Fe-Cr alloys with 9% Cr and 19% Cr respectively, were deposited with a CeO2 coating, and then oxidized at 600℃ -770℃ in water vapor. The results show that the presence of CeO2 coating can not change the oxide scale structure as well as the oxidation rate for the 9% Cr alloy ,however for 19% Cr alloy CeO2 coating can promote the outward diffusion of Cr and prevent the inward diffusion of O, thus enhance the oxidation resisitance of the alloy.

关 键 词：FE-CR合金 稀土 氧化 

分 类 号：TG174.44[金属学及工艺—金属表面处理]