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采用自组装方法,在镁基体表面制备了一层超疏水硬脂酸分子层,并采用接触角、扫描电镜、红外光谱、电化学阻抗等测试技术对获得的超疏水层进行了表征和分析.研究表明,经过大约1 h的组装,硬脂酸分子成功的键合到镁基体上,形成了微米-纳米尺寸花瓣状结构的硬脂酸膜,接触角也快速增加至154°.电化学阻抗测试表明,超疏水膜可以提高镁基体的电荷传递电阻,在一定程度上抑制镁的局部腐蚀.
A superhydrophobic stearic acid molecular layer was prepared on the surface of magnesium matrix by self-assembly method. The superhydrophobic layer was characterized and analyzed by using contact angle, scanning electron microscopy, infrared spectroscopy and electrochemical impedance spectroscopy. The results show that after about 1 h assembly, the stearic acid molecule is successfully bonded to the magnesium matrix to form a stellate film with micron-nanometer size petaloid structure and the contact angle rapidly increases to 154 °. The electrochemical impedance Tests show that the superhydrophobic film can improve the charge transfer resistance of magnesium matrix, to a certain extent, inhibit the local corrosion of magnesium.