Enhanced protective coatings on Ti-10V-2Fe-3Al alloy through anodizing and post-sealing with layered double hydroxides
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第2期
论文作者：Lei Liu Liang Wu Xiaobo Chen Deen Sun Yuan Chen Gen Zhang Xingxing Ding Fusheng Pan
文章页码：104 - 113
摘 要：Anodic oxidation is a prevalent technique to introduce superior corrosion and wear resistance upon the surface of titanium（Ti） alloys, in which the selection of appropriate electrolytes and defect-sealing strategies is a key. This study aims to address such issues through anodizing Ti-10V-2Fe-3Al alloy in malic acid, followed by a post-sealing treatment with Mg-Al layered double hydroxides（LDHs）. The characteristics of the samples were investigated using scanning electron microscopy（SEM）, atomic force microscopy（AFM）, glow discharge optical emission spectroscopy（GDOES）, X-ray diffraction（XRD） and energy-dispersive X-ray spectroscopy（EDS）. SEM micrographs reveals that the anodic coating had a surface full of bulges and cracks, and was almost sealed by the following LDHs treatment. XRD pattern indicate that the anodic coating was mainly consisted of amorphous TiO2 with a small fraction of anatase,but its crystallization degree was increased through the post-sealing. Moreover, electrochemical and tribological measurements demonstrate that corrosion current density was 2.8 × 10-6, 2.0×10-7, 5.9×10-9A cm-2, and wear rate was 1.45×10-3, 1.30×10-4 and 6.90×10-5 mm3 N-1 m-1 for respective bare Ti-10V-2Fe-3Al alloy substrate, anodized specimens without and with the LDHs post treatment. Finally, a plausible wear mechanism was proposed.
Lei Liu1，Liang Wu1,2，Xiaobo Chen3，Deen Sun1,2，Yuan Chen1,2，Gen Zhang1，Xingxing Ding1，Fusheng Pan1,2
1. College of Materials Science and Engineering, Chongqing University2. National Engineering Research Center for Magnesium Alloys, Chongqing University3. School of Engineering, RMIT University, City Campus
摘 要：Anodic oxidation is a prevalent technique to introduce superior corrosion and wear resistance upon the surface of titanium（Ti） alloys, in which the selection of appropriate electrolytes and defect-sealing strategies is a key. This study aims to address such issues through anodizing Ti-10V-2Fe-3Al alloy in malic acid, followed by a post-sealing treatment with Mg-Al layered double hydroxides（LDHs）. The characteristics of the samples were investigated using scanning electron microscopy（SEM）, atomic force microscopy（AFM）, glow discharge optical emission spectroscopy（GDOES）, X-ray diffraction（XRD） and energy-dispersive X-ray spectroscopy（EDS）. SEM micrographs reveals that the anodic coating had a surface full of bulges and cracks, and was almost sealed by the following LDHs treatment. XRD pattern indicate that the anodic coating was mainly consisted of amorphous TiO2 with a small fraction of anatase,but its crystallization degree was increased through the post-sealing. Moreover, electrochemical and tribological measurements demonstrate that corrosion current density was 2.8 × 10-6, 2.0×10-7, 5.9×10-9A cm-2, and wear rate was 1.45×10-3, 1.30×10-4 and 6.90×10-5 mm3 N-1 m-1 for respective bare Ti-10V-2Fe-3Al alloy substrate, anodized specimens without and with the LDHs post treatment. Finally, a plausible wear mechanism was proposed.
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