期刊
JOURNAL OF NUCLEAR MATERIALS
卷 514, 期 -, 页码 348-357出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2018.12.018
关键词
Molten salts; Superalloys; High temperature corrosion
资金
- National Natural Science Foundation of China [51471177, 51671053]
- Ministry of Education [6141A020332-004]
CrN barrier was deposited between a Ni-electroplating and GH3535 alloy with the goal of prohibiting elements interdiffusion and increasing corrosion resistance in molten FLiNaK (LiF-NaF-KF: 46.5-11.5-42.0 mol%) salt. Results indicate that the Ni-coating apparently improves corrosion resistance of GH3535 in molten fluoride salts, but Cr and Fe diffuse constantly from the alloy to the Ni-coating. They are finally dissolved into the molten salt, causing corrosion of the GH3535 alloy. With a CrN diffusion barrier, however, elements interdiffusion has been completely suppressed and the corrosion resistance is further improved by more than eight times comparing to the CrN-free Ni-coated alloy. (C) 2018 Elsevier B.V. All rights reserved.
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