Passivity Degradation of Nuclear Materials in Reduced Sulfur Environments:A Review  

作　　者：高志明 王泽清 孙颖昊 吴思博 马超 祝钰 夏大海 

机构地区：[1]Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University [2]School of Materials Science and Engineering, Tianjin University [3]Department of Chemical and Materials Engineering, University of Alberta

出　　处：《Transactions of Tianjin University》2016年第3期189-201,共13页天津大学学报（英文版）

基　　金：Supported by the National Basic Research Program of China("973"Program,No.2014CB046805);National Natural Science Foundation of China(No.51131007,No.51371124);Natural Science Foundation of Tianjin(No.14JCYBJC17700);the Open-Ended Fund of the Key Laboratory of Nuclear Materials and Safety Assessment(Institute of Metal Research,Chinese Academy of Sciences,China)(No.2016NMSAKF02)

摘　　要：This paper reviews sulfur-induced passivity degradation of nuclear materials with emphasis on steam generator(SG)alloys. The state of arts on this topic concerning thermodynamic calculation and experimental data has been reviewed. Thermodynamic calculation results indicate that the distribution of sulfur species strongly depends on p H and temperature. Experimental data show that solution p H, temperature and solution chemistries can significantly affect the electrochemical behaviors of SG materials and the underlying degradation mechanisms. Some issues when conducting corrosion tests at high temperature should be paid attention to, such as the dissolution of the autoclave, which may affect the facticity of the experimental results.This paper reviews sulfur-induced passivity degradation of nuclear materials with emphasis on steam generator （SG） alloys. The state of arts on this topic concerning thermodynamic calculation and experimental data has been reviewed. Thermodynamic calculation results indicate that the distribution of sulfur species strongly de- pends on pH and temperature. Experimental data show that solution pH, temperature and solution chemistries can significantly affect the electrochemical behaviors of SG materials and the underlying degradation mechanisms. Some issues when conducting corrosion tests at high temperature should be paid attention to, such as the dissolution of the autoclave, which may affect the facticity of the experimental results.

关 键 词：nuclear materials steam generator SULFUR passivity degradation mechanism high temperature 

分 类 号：TL341[核科学技术—核技术及应用]