| WU Liang,CHEN Jing,ZHANG Sheng,TANG Ai-tao,YANG Dan-ni,ZHANG Gen,LIU Lei,PAN Fu-sheng.Influence of Reaction Time on Growth Behaviours of Mg-Al LDH Films[J],48(3):19-26 |
| Influence of Reaction Time on Growth Behaviours of Mg-Al LDH Films |
| Received:December 10, 2018 Revised:March 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.03.003 |
| KeyWord:magnesium alloy corrosion resistance in-situ growth layered double hydroxide (LDH) reaction time |
| Author | Institution |
| WU Liang |
1.Chongqing University, Chongqing , China; 2. National Engineering Research Center for Magnesium Alloys, Chongqing , China |
| CHEN Jing |
1.Chongqing University, Chongqing , China |
| ZHANG Sheng |
1.Chongqing University, Chongqing , China |
| TANG Ai-tao |
1.Chongqing University, Chongqing , China; 2. National Engineering Research Center for Magnesium Alloys, Chongqing , China |
| YANG Dan-ni |
3. Harbin Institute of Technology, Harbin , China |
| ZHANG Gen |
1.Chongqing University, Chongqing , China |
| LIU Lei |
1.Chongqing University, Chongqing , China |
| PAN Fu-sheng |
1.Chongqing University, Chongqing , China; 2. National Engineering Research Center for Magnesium Alloys, Chongqing , China |
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| Abstract: |
| Mg-Al LDH film was fabricated on anodized magnesium alloy AZ31 by in-situ growth method. The characteristics of the film were investigated by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM) observation and electrochemical tests. The results showed that the crystallinity of LDH film was increased with reaction time. When the reaction time was more than 12 h, the LDH film had complete crystal layered structure. The anodic oxide film was sealed basically by the growth of LDH nanosheets after 6 h reaction. The corrosion resistance of the films became better with the increasing of reaction time. However, after 12 h reaction, the corrosion resistance of the film decreased. The formation behavior of the Mg-Al LDH film was proposed. That the competitive growth of LDH grains, which contains dissolution and recrystallization, was proposed to explain the change of the growth and corrosion resistance of the Mg-Al LDH film. |
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