期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 164, 期 -, 页码 146-155出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2017.02.020
关键词
Molten salt; Corrosion; Thermal cycling; Superalloy; Chlorination
资金
- National Natural Science Foundation of China [51441003]
- Qinghai Natural Science Foundation [2015-ZJ-931Q]
- Science Technology Foundation for Middle-aged and Young Scientist of Qinghai University [2014-QGY-2]
As a solar energy storage medium at moderate-to-high temperature, molten chlorate severally corrodes metal vessels. The corrosion behavior and mechanisms of pure nickel (Ni), GH4033 and GH4169 in 793 K molten eutectic NaCl-MgCl2 were studied. During the initial stage of corrosion, pure Ni and GH4033 gain weight from the many plate-like shells formed on the sample surface. After corrosion for 40 h, all sample surfaces were rather porous and loosened. MgO nuclei that were attached to the loosened microstructure surface fell off with the microstructures, which led to a continual decrease in the sample weight. The three sample surfaces were mainly composed of MgO and Ni or (Ni, Fe) from the sample substrate. Al and Ti were preferentially oxidized and stably excited on the GH4033 surface, which inhibits the corrosion process. The corrosion rate of GH4169 was the highest for the delta phase, which is rich in Nb, and phase boundaries were corroded preferentially. In the anode reaction, metal atoms escape from the corrosion system in the form of chlorides or aqueous chlorides.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据