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The Influence of Holding Time on Morphologies and Electrochemical Properties of MAO/LDH Composite Film on LA103Z Mg-Li Alloy
The Influence of Holding Time on Morphologies and Electrochemical Properties of MAO/LDH Composite Film on LA103Z Mg-Li Alloy
- Source :
- Transactions of the Indian Ceramic Society; July 2020, Vol. 79 Issue: 3 p166-171, 6p
- Publication Year :
- 2020
-
Abstract
- In order to improve the corrosion resistance of magnesium-lithium (Mg-Li) alloy, a micro-arc oxidation (MAO) ceramic layer was first prepared on LA103Z Mg-Li alloy, and then the MAO coating on LA103Z Mg-Li alloy was sealed by layered double hydroxide (LDH) hydrothermal treatment. The obtained samples were subjected to immersion test in 3.5% NaCl solution for 8 days. The growth characteristics of different coatings before immersion were studied by XRD, SEM and EDS. Morphology and composition of the coatings were observed before and after corrosion. Electrochemical test of the composite film was performed to explore the corrosion resistance and influence of different time on corrosion resistance of MAO/LDH composite film. The results displayed that MAO/LDH composite film have the lowest corrosion current density, the most positive corrosion potential, can effectively protect the substrate from corrosion by NaCl solution, improved long-term corrosion protection, and can considerably improve the corrosion resistance of the alloy.
Details
- Language :
- English
- ISSN :
- 0371750X and 21655456
- Volume :
- 79
- Issue :
- 3
- Database :
- Supplemental Index
- Journal :
- Transactions of the Indian Ceramic Society
- Publication Type :
- Periodical
- Accession number :
- ejs54298727
- Full Text :
- https://doi.org/10.1080/0371750X.2020.1791734