Effects of alloying elements on the corrosion behavior of Ni-based alloys in molten NaCl-KCl-MgCl2 salt at different temperatures

被引：102
|
作者：
Sun, Hua [1 ]
Zhang, Peng [1 ]
Wang, Jianqiang [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Appl Phys, 2019 Jialuo Rd, Shanghai 201800, Peoples R China
来源：
CORROSION SCIENCE | 2018年 / 143卷
关键词：
Ni-based alloy; Molten chloride salt; Corrosion; Alloying element; NICKEL; SALTS; COMPATIBILITY; LICL; ATMOSPHERES; MECHANISMS; RESISTANCE; CHROMIUM; METALS;
D O I：
10.1016/j.corsci.2018.08.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of alloying elements on corrosion of Ni-based alloys in NaCl-KCl-MgCl2 under Ar in the temperature range of 600 similar to 800 degrees C were investigated by immersion test, SEM/EDS, EPMA and XRD techniques. A thermodynamic potential-pO(2-) diagram for Cr, Ni at 700 degrees C was constructed. The alloy corrosion is attributed to the dissolution of Cr to form Cr chlorides into salt. The elements Cr, Mo and W can affect the alloy corrosion. The corrosion is accelerated and the intergranular corrosion becomes more pronounced with temperature. Furthermore, the effects of the alloying elements on corrosion have a strong temperature dependence. The related mechanisms are discussed.
引用
收藏
页码：187 / 199
页数：13
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