Anticorrosive superhydrophobic AZ61 Mg surface with peony-like microstructures

作者：Li, Lingjie; He, Jianxin; Lei, Jinglei^*; Liu, Lei; Zhang, Xueping; Huang, Tao; Li, Nianbing; Pan, Fusheng

来源：Journal of the Taiwan Institute of Chemical Engineers, 2017, 75: 240-247.

DOI：10.1016/j.jtice.2017.03.007

• Superhydrophobic surface
• Magnesium alloy
• Biomimetic microstructure
• Corrosion protection

We developed the following facile approach to prepare a superhydrophobic surface with peony-like microstructures for corrosion protection of AZ61 Mg. First, magnesium (hydr)oxides with appealing peony like microstructures were constructed on AZ61 Mg by a simple water-only hydrothermal oxidation method. Then the surface was modified by a low-surface-energy compound, dodecafluoroheptyl-propyl-trimethoxylsilane (Actyfion-G502), to realize superhydrophobicity with a water contact angle of 152.1 degrees. The corrosion resistance of the as-prepared superhydrophobic layer is 35,149 Omega cm(2), much higher than that of the hydrothermdlly-formed sample (4435 Omega cm(2)), which can decrease the corrosion current density of AZ61 Mg to about one-eighth of that of the untreated sample and to about one-fourth of that of the hydrothermally-treated sample relying on the obstructive and capillary effects.

• 出版日期2017-6
• 单位西南大学; 重庆大学