Corrosion behavior and elements interdiffusion between a Ni coating and GH3535 alloy with and without a CrN barrier in molten fluoride salts

被引：22

作者：

Wang, Chengxu ^{[1
,2
]}

Chen, Wei ^{[1
]}

Chen, Minghui ^{[3
]}

Chen, Demin ^{[1
]}

Yang, Ke ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China

[3] Northeastern Univ, Shenyang Natl Lab Mat Sci, Corros & Protect Div, Shenyang 110819, Liaoning, Peoples R China

来源：

JOURNAL OF NUCLEAR MATERIALS | 2019年 / 514卷

基金：

中国国家自然科学基金;

关键词：

Molten salts; Superalloys; High temperature corrosion; HIGH-TEMPERATURE CORROSION; ION IRRADIATION; FLINAK; NAF; LIF; SUPERALLOY; OXIDATION; MOISTURE;

D O I：

10.1016/j.jnucmat.2018.12.018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：348 / 357

页数：10

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