期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 629, 期 -, 页码 290-296出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.12.143
关键词
Nd; AM60 alloy; Constant of apparent corrosion rate (k)
资金
- National Nature Science Foundation of PR China [51174143, 50901048]
- Shanxi Province Science Foundation [2010021022]
- Special/Youth Foundation of Taiyuan University of Technology [2012L055]
- Open Project of State Key Laboratory of New Technology in Iron and Steel Metallurgy [KF13-06]
AM60 alloys with different Nd contents were melted, refined and prepared in vacuum resistance furnace. The alloys were investigated by weight loss test in 3.5% NaCl solution at 25 degrees C. The obvious changes of microstructures before and after the corrosion were characterized by scanning electron microscopy and X-ray diffraction. With the use of experimental data, a combination model was established to describe the galvanic corrosion rate of AM60 alloys. The constant of apparent corrosion rate (k) was calculated. The effect of Nd content on the grain size (d), organizational structure and corrosion rate of specimens were discussed. The results showed that the constant of apparent corrosion rate was affected by Nd content. Their relationship is described as k = 0.6 exp(-2:7Nd% ) + 0.58. The maximum and minimum value of k is 1.21 and 0.53 mu m/h, respectively. The reason for k decreasing is that trace Nd refined the grain size and generated different forms of Al11Nd3 phases. Corrosion protection film was formed in the area near rare earth-enriched phase. The film played an important role in corrosion together with the corrosion products on the surface of the alloy, indicating an improvement of corrosion resistance of AM60 alloys. (C) 2015 Elsevier B.V. All rights reserved.
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