The corrosion behavior of two-phase Ni-Dy alloys in a eutectic (Li,K)2CO3 mixture at 650 °C |
| |
Authors: | CL Zeng T Zhang PY Guo WT Wu |
| |
Affiliation: | State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Wencui Road 62, Shenyang 110016, People's Republic of China |
| |
Abstract: | The corrosion behavior of binary Ni-Dy alloys containing 1, 3 and 5 wt.% Dy in a eutectic (0.62Li,0.38K)2CO3 mixture at 650 °C has been investigated. The alloys are two-phase composed of α-Ni solid solution and intermetallic compound Dy2Ni17. The experimental results indicate that the corrosion rate of the three Ni-Dy alloys is significantly lower than that of pure Ni, forming a scale mainly composed of NiO together with a small amount of dysprosium oxides. The weight gain of the alloys changes little with the content of dysprosium, while the thickness of the scale decreases with increasing content of dysprosium. The presence of Dy can promote the lithiation process of NiO during immersion in the melt. The corrosion mechanism of the alloys is also discussed. |
| |
Keywords: | Nickel Ni-Dy alloys Molten (Li K)2CO3 Corrosion |
本文献已被 ScienceDirect 等数据库收录! |
|