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Controlling Wettability for Improved Corrosion Inhibition on Magnesium Alloy as Biomedical Implant Materials
Author(s) -
Liu Yan,
Yao Wenguang,
Yin Xiaoming,
Wang Huiyuan,
Han Zhiwu,
Ren Luquan
Publication year - 2016
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201500723
Subject(s) - superhydrophilicity , materials science , contact angle , wetting , corrosion , annealing (glass) , simulated body fluid , microstructure , alloy , metallurgy , magnesium alloy , magnesium , biocompatibility , surface energy , chemical engineering , superhydrophobic coating , composite material , scanning electron microscope , engineering
Special wettability surfaces such as superhydrophilic surface and superhydrophobic surface have become a hot topic of research because of the potential engineering applications. In this work, TZ51 magnesium alloys as biomedical implant materials have been treated by anodic oxidation. The water contact angle on the as‐prepared surface is 0° after anodic oxidation treatment. After being modified by stearic acid (SA) for 1 h at room temperature, the as‐prepared superhydrophilic surface shows superhydrophobicity with a water contact angle (WCA) as high as 163°. Different wettability surfaces can be obtained through annealing at different temperatures below 200 °C. However, after annealing at 300 °C for 0.5 h, the superhydrophobic surface becomes superhydrophilic with a WCA of 0° without destroying the microstructure of the surface. Moreover, the annealed surface can restore superhydrophobicity when remodified by SA. In addition, the superhydrophobic sample exhibits good corrosion resistance property compared with the bare Mg alloy substrate and superhydrophilic sample in Hank's simulated body fluid. The superhydrophobic TZ51 magnesium alloy will contribute to solving the corrosion problem of Mg alloys and increase its applications in clinical field.

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