Journal
CORROSION SCIENCE
Volume 65, Issue -, Pages 145-151Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2012.08.011
Keywords
Magnesium; Rare earth elements; Polarization; SEM; Pitting corrosion
Funding
- Turkey Council of Higher Education (YOK)
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The influence of Ce additions to AM50 magnesium alloy prepared by high pressure die casting on the microstructure and corrosion behaviour has been investigated. The corrosion behaviour was evaluated by hydrogen evolution, salt spray, potentiodynamic polarization and electrochemical impedance experiments. The results show that Ce addition promotes the formation of Al11Ce3 phase and reduces the amount of beta-phase (Mg17Al12). The corrosion resistance is improved with increasing Ce content which can be attributed to the formation of Al11Ce3 phase, reduction of beta-phase (reduced galvanic effects) and higher purity of AME50X alloys (melt cleaning effects). (C) 2012 Elsevier Ltd. All rights reserved.
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