期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 165, 期 14, 页码 C950-C961出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0771814jes
关键词
-
资金
- Department of Energy Office of Energy Efficiency and Renewable Energy (DOE EERE), Lightweight Materials, Vehicle Technology Office [DE-EE0006436]
The corrosion behavior of single-phase Mg-Al alloys has been examined using a combination of aqueous, atmospheric and ionic liquid based techniques. Our results show preferential rapid dissolution of Mg along with redistribution and enrichment of the effectively more noble Al component. During aqueous free corrosion experiments immediate pH increases were measured at the solid-liquid interface in aqueous chloride. Using inductively coupled plasma mass spectroscopy the oxide/hydroxide chemical dissolution rates were determined to be 0.222 per atomic site/s for Mg2+ and 0.022 per atomic site/s for Al3+ from the elemental alloy components. Atmospheric corrosion studies measured a 60. contact angle decrease during 20 hour free corrosion corresponding to a small 0.04 Jm(-2) reduction in the MgO/water interfacial free energy. Rotating disk electrode and ionic liquid dissolution techniques revealed mud cracking, platelet formation and nanowire morphologies that can result from selective dissolution of Mg in single-phase Mg-Al alloys. The evolution of these morphologies is described in terms of a step-flow dissolution mechanism. (c) 2018 The Electrochemical Society.
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