Rapid Fabrication of Large-Area, Corrosion-Resistant Superhydrophobic Mg Alloy Surfaces
Rapid Fabrication of Large-Area, Corrosion-Resistant Superhydrophobic Mg Alloy Surfaces
复制标题
快速制造大面积耐腐蚀超疏水镁合金表面
DOI：
10.1021/am2010527
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发表时间：
2011-11-01
影响因子：
9.5
通讯作者：
Yu, Ziyuan
中科院分区：
文献类型：
--
作者：
Xu, Wenji;Song, Jinlong;Yu, Ziyuan
采用简单的电化学加工工艺制备了超疏水镁（Mg）合金表面，并在表面覆盖了一层氟烷基硅烷（FAS）薄膜。利用扫描电子显微镜（SEM）、能谱仪（EDS）和傅里叶变换红外分光光度计（FTIR）对其表面形貌和化学成分进行了研究。结果表明，镁合金表面呈现层次分明的粗糙结构和低表面能的FAS膜，具有良好的超疏水性，水接触角为165.2度，水倾斜角约为2度。在一定的单位面积去除率条件下，考察了处理时间和单位面积去除率对超疏水性的影响。有趣的是，当单位面积去除率约为11.10 mg/cm(2)时，超疏水性不随单位面积去除率的变化而变化。因此，基于这一特性可以快速制备超疏水镁合金表面。利用小面积移动阴极，首次制备了大面积超疏水镁合金表面。研究了超疏水表面的耐蚀性和耐久性。
A superhydrophobic magnesium (Mg) alloy surface was successfully fabricated via a facile electrochemical machining process, and subsequently covered with a fluoroalkylsilane (FAS) film. The surface morphologies and chemical compositions were investigated using a scanning electron microscope (SEM) equipped with an energy-dispersive spectroscopy (EDS) and a Fourier-transform infrared spectrophotometer (FTIR). The results show hierarchal rough structures and an FAS film with a low surface energy on the Mg alloy surfaces, which confers good superhydrophobicity with a water contact angle of 165.2 degrees and a water tilting angle of approximately 2 degrees. The processing conditions, such as the processing time and removal rate per unit area at a constant removal mass per unit area, were investigated to determine their effects on the superhydrophobicity. Interestingly, when the removal mass per unit area is constant at approximately 11.10 mg/cm(2), the superhydrophobicity does not change with the removal rate per unit area. Therefore, a superhydrophobic Mg alloy surface can be rapidly fabricated based on this property. A large-area superhydrophobic Mg alloy surface was also fabricated for the first time using a small-area moving cathode. The corrosion resistance and durability of the superhydrophobic surfaces were also examined.