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

页码：187 / 199

页数：13

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