Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (6): 060602 doi: 10.13538/j.1001-8042/nst.26.060602

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Speciation study of chromium corrosion product in molten LiF-NaF-KF salt

QIU Jie, 1, 2 ZOU Yang,1 YU Guo-Jun,1 HE Shang-Ming,1 LIU Wen-Guan,1 JIA Yan-Yan,1 LI Zhi-Jun,1 and XU Hong-Jie 1   

  1. 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2University of Chinese Academy of Sciences, Beijing 100049, China
  • Contact: XU Hong-Jie E-mail:xuhongjie@sinap.ac.cn
  • Supported by:

    Supported by Science and Technology Commission of Shanghai Municipality (No. 11JC1414900), National Basic Research Program of China (No. 2010CB934501), the “Strategic Priority Research Program” of Chinese Academy of Sciences (No. XDA02040000), National Natural Science Foundation of China (Nos. 11005148 and 51371188), and the Special Presidential Foundation of Chinese Academy of Sciences, China (No. 29)

QIU Jie, ZOU Yang, YU Guo-Jun, HE Shang-Ming, LIU Wen-Guan, JIA Yan-Yan, LI Zhi-Jun, XU Hong-Jie . Speciation study of chromium corrosion product in molten LiF-NaF-KF salt.Nuclear Science and Techniques, 2015, 26(6): 060602     doi: 10.13538/j.1001-8042/nst.26.060602

Abstract:

To investigate the corrosion products of Cr in molten FLiNaK salt (46.5 mol% LiF–11.5 mol% NaF–42 mol% KF), the corrosion test of the pure metal Cr was performed in molten FLiNaK salt at 700 C for 200 h. The FLiNaK salt after the corrosion test was thoroughly investigated by X-ray absorption near-edge structure spectroscopy, a transmission electron microscope, and X-ray diffraction. The results demonstrate that the predominant oxidation state of Cr in FLiNaK salt is Cr3+, and the main corrosion product in cooled FLiNaK salt is K2NaCrF6.

Key words: FLiNaK, Cr, Corrosion product, K2NaCrF6