Abstract
Super-hydrophobic film with hierarchical micro/nano structures was prepared by galvanic replacement reaction process on the surface of galvanized steel. The effects of the etching time and copper nitrate concentration on the wetting property of the as-prepared surfaces were studied. Scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and electrochemical technique were employed to characterize the surface morphology, chemical composition, and corrosion resistance. The stability and self-cleaning property of the as-fabricated super-hydrophobic film were also evaluated. The super-hydrophobic film can be obtained within 3 min and possesses a water contact angle of 164.3° ± 2°. Potentiodynamic polarization measurements indicated that the super-hydrophobic film greatly improved the corrosion resistance of the galvanized steel in 3.5 wt % NaCl aqueous solution. The highest inhibition efficiency was estimated to be 96.6%. The obtained super-hydrophobic film showed good stability and self-cleaning property.
Highlights
Galvanizing is recognized as a traditional technology to protect steel free from corrosion.The hot-dipped zinc coating on steel surface can provide both barrier protection and cathodic protection [1]
We report a simple and fast method, which is inspired by Song et al, for constructing a super-hydrophobic film with hierarchical structure on galvanized steel surface
Surface wettability of the samples were characterized by the static water contact angle system
Summary
Galvanizing is recognized as a traditional technology to protect steel free from corrosion. There are few reports focusing on the application of super-hydrophobic surfaces on hot-dip galvanized steel [32]. It is, important to develop a simple, environmental, and cost-effect way for large-scale fabrication of super-hydrophobic surfaces based on galvanized substrates. We report a simple and fast method, which is inspired by Song et al, for constructing a super-hydrophobic film with hierarchical structure on galvanized steel surface. From a viewpoint of industry application, the presented method is more facile and cost-effective than the works reported before, which can be potentially used for the large-scale preparation of super-hydrophobic surfaces based on galvanized steel
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
