Journal
CORROSION SCIENCE
Volume 87, Issue -, Pages 489-503Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2014.07.015
Keywords
Alloy; Magnesium; EIS; SEM; Oxidation; Interfaces
Funding
- Natural Science and Engineering Research Council of Canada (NSERC)
- National Council of Science and Technology of Mexico (CONACyT)
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The corrosion mechanisms and kinetics of WE43 Mg alloy in a modified simulated body fluid (m-SBF) are investigated by electrochemical, hydrogen evolution and analytical techniques. The changes in the impedance response over time are related to four corrosion stages involving the formation of a partially protective corrosion layer and adsorption of Mg intermediates, formation of an inner passive MgO layer with increasing coverage over time, rupture of the corrosion layer and lateral growth of stable pits. ATR-FTIR, XRD and XPS results show the presence of an amorphous carbonated apatite/Mg(OH)(2) mixed corrosion layer. (c) 2014 Elsevier Ltd. All rights reserved.
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