Compatibility of T91 steel with liquid Pb-Bi eutectic alloy at 450oC

• 作 者: Zhang Yutuo Dong Hong Wang Pei
• 机 构: Shenyang Ligong University,Shenyang National Laboratory for Materials Science
• 出 处: 中国铸造
• 发表日期: 2004年期
• 关键词: T91 steel Pb-Bi eutectic aloy compatibility oxide
• 基金项目: the Strategic Priority Research Program CAS under Grant;the National Science Foundation of China under Grant;the Youth Innovation Promotion Association CAS

Pb-Bi eutectic alloy has been receiving increasing attention as a heavy liquid metal coolant in accelerator driven systems and Generation IV ifssion reactors. Compatibility of structural materials with liquid Pb-Bi eutectic aloy at high temperature is one of the issues concerned. In the present study, corrosion tests of T91 steel in stagnant Pb-Bi eutectic aloy in saturated oxygen condition at 450 oC were carried out. After experiments, the thickness and compositional proifle of the oxide layer on the specimen were analyzed using SEM and EDX. Analysis results show that the thickness of the oxide layer increases as the exposure time increases from 500 h to 1,000 h. The thickness of the oxide layer remains almost unchanged at 15 to 16mm from 1,000 to 1,500 h. Formation of a thick and protective oxide layer at 450 oC prevents the penetration of liquid Pb-Bi eutectic aloy into the matrix of the T91 steel.