Journal
CORROSION SCIENCE
Volume 161, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2019.108185
Keywords
Magnesium; Intermetallics; SVET; SIET; TEM; Galvanic corrosion
Funding
- National Natural Science Foundation of China [51431002, 51871004]
- NSFC/RGC Joint Research Scheme [51661165014]
- Peking University Medicine Seed Fund for Interdisciplinary Research [BMU2018ME005]
- Beijing Municipal Health Commission [BMC2018-4]
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The purpose of this study is to comparatively investigate on intermetallic compounds Mg2Ca and MgZn2 in galvanic corrosion of magnesium alloy by using real-time in situ monitoring techniques. The results indicated Mg2Ca functioned as an anode with higher anodic current density, higher Mg2+ concentration and higher pH values than the Mg cathode, while MgZn2 worked as a cathode with a cathodic current density, lower Mg2+ concentration and higher pH value than the anodic Mg. The results also suggested a corrosion forming mechanism involving solubility product constant (K-sp) in which Zn-based corrosion products were easier to form than their Mg counterparts.
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