期刊
SCRIPTA MATERIALIA
卷 163, 期 -, 页码 125-129出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.01.015
关键词
Magnesium; Corrosion; Phase; Microalloying; Volta potential
类别
资金
- UNIST (Ulsan National Institute of Science and Technology) [1.190014.01]
A significant enhancement in corrosion resistance by Y microalloying was achieved for the Mg-8Sn-1Zn-1Al (wt %) alloy in the extruded condition. Average corrosion rates obtained by immersion tests in 0.6 M NaCI solution at 25 degrees C were 42 and 12.7 mm y(-1) for the alloys with and without microalloying with 0.04 wt%Y, respectively. Microstructural investigations indicated that the enhanced corrosion resistance is a result of a transition in a type of second-phase particles toward lowering the difference in electrochemical nobility between the alpha-Mg and these particles, thereby reducing the susceptibility of the alloy to microgalvanic corrosion. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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