Journal
CORROSION SCIENCE
Volume 118, Issue -, Pages 227-232Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2017.01.022
Keywords
Alloy; Magnesium; Weight loss; Pitting corrosion
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2015R1A1A1A05001461, NRF-2014R1A1A2059072]
- Fundamental Research Program - Korea Institute of Materials Science
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We report that alloying with Y remarkably enhances the corrosion resistance of extruded Mg-Al-Ca based alloy. The corrosion rates, measured by immersion tests in 0.6 M NaCl solution at 25 degrees C, were 0.31 and 1.84 mm y(-1) for the Mg-6Al-1Zn-0.5Ca-0.3Mn (wt.%) alloys with and without 0.25 wt.% Y, respectively. The improved corrosion resistance is mainly attributed to a change in the type of Al-containing intermetallic particles toward reducing their electrochemical nobility, resulting in reduced H-2 evolution rate during corrosion. (C) 2017 Elsevier Ltd. All rights reserved.
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