Corrosion resistance of steel materials in LiCl-KCl melts  

作　　者：Le Wang Bing Li Miao Shen Shi-yan Li Jian-guo Yu 

机构地区：[1]National Engineering Research Center for Integrated Utilization of Salt Lake Resource,East China University of Science and Technology,Shanghai 200237,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2012年第10期930-933,共4页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National High-Tech Research and Development Program of China(No.2009AA06Z102);the National Natural Science Foundation of China(Nos.50934001 and 51054004)

摘　　要：The corrosion behaviors of 304SS, 316LSS, and Q235A in LiCl-KCl melts were investigated at 450℃ by Tafel curves and elec- trochemical impedance spectroscopy （EIS）. 316LSS shows the best corrosion resistance behaviors among the three materials, including the most positive corrosion potential and the smallest corrosion current from the Tafel curves and the largest electron transfer resistance from the Nyquist plots. The results are in good agreement with the weight losses in the static corrosion experiments for 45 h. This may be attributed to the better corrosion resistance of Mo and Ni existing as alloy elements in 316LSS, which exhibit the lower corrosion current densities and more positive corrosion potentials than 316LSS in the same melts.The corrosion behaviors of 304SS, 316LSS, and Q235A in LiCl-KCl melts were investigated at 450℃ by Tafel curves and elec- trochemical impedance spectroscopy （EIS）. 316LSS shows the best corrosion resistance behaviors among the three materials, including the most positive corrosion potential and the smallest corrosion current from the Tafel curves and the largest electron transfer resistance from the Nyquist plots. The results are in good agreement with the weight losses in the static corrosion experiments for 45 h. This may be attributed to the better corrosion resistance of Mo and Ni existing as alloy elements in 316LSS, which exhibit the lower corrosion current densities and more positive corrosion potentials than 316LSS in the same melts.

关 键 词：stainless steel molten salts corrosion resistance LITHIUM ELECTROLYSIS 

分 类 号：TG14[一般工业技术—材料科学与工程] TQ153.2[金属学及工艺—金属材料]