Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 831, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.154580
Keywords
Mg alloys; Micro-arc oxidation; Layered double hydroxide; Active anti-corrosion mechanism
Categories
Funding
- National Natural Science Foundation of China [51871057, 51901044, 51771064]
- Fujian Natural Science Foundation [2019J01227]
- Science Foundation of Education Department of Fujian Province [JK2015030]
Ask authors/readers for more resources
In this paper, a novel composite coating combining Layered Double Hydroxides (LDH) film and Micro-arc Oxidation (MAO) ceramic layer was designed to further enhance anti-corrosion protection of coating. The MgFe-LDH/MAO composite coating was prepared through in situ synthesis MgFe-LDH nanoflakes on the surface of MAO coating. Subsequently, the active anti-corrosion mechanism of MgFe-LDH layer was revealed through microstructure characterization and electrochemical test. Furthermore, the interaction between LDH nanoflakes and original MAO coating was investigated, too. The results show that: LDH nanoflakes preferentially grow in the pores of original MAO coating, and form a dense layer on MAO coating. In situ prepared LDH layer gives a strong and stable adhesion on MAO coating, besides the dissolution of original MAO coating affects LDH growth. MgFe-LDH layer supplied an active anti-corrosion protection for Mg alloy, since LDH can effectively seal the inherent defects of MAO coating and absorb corrosive medium in environment. (C) 2020 Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available