Journal
MATERIALS
Volume 12, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/ma12030549
Keywords
magnesium; intermetallics; metal matrix composites; XPS; polarization; EIS
Categories
Funding
- Research and Development Plan of Shaanxi Province, China [2017GY-118]
- Science and Technology Innovation Project [009-031-001]
- State Key Laboratory for Mechanical Behavior of Materials [20151712]
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The strength of Mg-Li alloy is greatly improved by the composite strengthening of intermetallic compound YAl2 particles, but the low corrosion resistance of Mg-Li alloy is still the main factor that restricts the application of the alloy and its composites. In this paper, the effect of YAl2 particles on the corrosion behavior of Mg-Li alloy was systematically investigated. The results showed that the corrosion resistance of YAl2p/LA143 composite could be significantly improved, accounting for the formation of a transitional interface layer by adding YAl2 particles. The diffusion of yttrium and aluminum atoms from YAl2 particulates improved the stability of the surface film and enhanced the adhesion between the corrosion products and the substrate, which hindered further expansion of pitting.
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