Effect of Hydrothermal Treatment Time on Microstructure and Corrosion Behavior of Micro-arc Oxidation/Layered Double Hydroxide Composite Coatings on LA103Z Mg-Li Alloy in 3.5 wt.% NaCl Solution
| Autor: | Xin Duan, Ju-mei Zhang, Zhi-hu Wang, Hui Cai, Yang Zhang, Kai Wang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Alloy Composite number 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Hydrothermal circulation Corrosion chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials visual_art 0103 physical sciences engineering visual_art.visual_art_medium Hydroxide General Materials Science Ceramic Magnesium alloy 0210 nano-technology |
| Zdroj: | Journal of Materials Engineering and Performance. 29:4032-4039 |
| ISSN: | 1544-1024 1059-9495 |
| DOI: | 10.1007/s11665-020-04906-7 |
| Popis: | The micro-arc oxidization (MAO) ceramic layer on an LA103Z Mg-Li alloy substrate was treated with a hydrothermal treatment at 90 °C for various times. The effect of the hydrothermal treatment time on the microstructure and corrosion behavior of MAO/LDH composite coatings in 3.5 wt.% NaCl solution was investigated, and the mechanism of hydrothermal film formation and corrosion was discussed. The results show that MgO on the surface of the MAO ceramic coating was partially dissolved during the hydrothermal treatment, and the released Mg2+ ions combined with OH− ions in the hydrothermal solution to form Mg(OH)2 nanosheets, which were deposited on the surface of the ceramic coating and its pores. The hydrogen evolution rates of the MAO/LDH composite coatings rank as MAO/LDH-24 h |
| Databáze: | OpenAIRE |
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