Abstract
Practical application of superhydrophobic surfaces is limited by the fragility of nanoscale asperities. Combining chemical etching and anodization, microscale pits and nanoscale pores, instead of the micro and nano protrusions on traditional superhydrophobic surfaces mimicking Lutos leaves, were fabricated on commercially pure aluminum surfaces. After modified by FDTS, the surfaces were superhydrophobic and self-cleaning. The ultrahigh hardness and electrochemical stability of Al2O3 coating endowed the surface excellent mechanical durability and good corrosion resistance. Because the method is scalable, it may find practical application on body panels of automobiles and aircrafts and so on.
Highlights
On magnesium alloy to increase the durability in corrosive NaCl aqueous solution[30,31]
X-ray photoelectron spectroscopic (XPS) tests were conducted with a surface analyzer (Kratos Axis Ultra DLD) using an Al Kα source working at 14 kV and 25 mA
For the polypropylene fabric abrasion, the surface was pressed on a polypropylene fabric strap by a weight of 50 g which can generate a pressure of 500 Pa on the surface and wiped along the strap at a speed of 3.62 cm/s for 4 m
Summary
On magnesium alloy to increase the durability in corrosive NaCl aqueous solution[30,31]. Detailed study on the surface morphology evolution indicates the nanopores are formed within 10 min (Fig. 2c).
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