Fabrication of robust gold superhydrophobic surface on iron substrate with properties of corrosion resistance, self-cleaning and mechanical durability

Well-defined gold nanoflower superhydrophobic surface (SHS) was constructed on iron foil by chemical deposition and anneal. The as-fabricated sample exerts excellent superhydrophobicity with water contact angle (WCA) up to 169°, a sliding angle of about 3°. The samples were characterized via scannin...

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Bibliographic Details
Published in:Journal of alloys and compounds 2017-12, Vol.728, p.271-281
Main Authors: Cui, Shuo, Lu, Shixiang, Xu, Wenguo, An, Baifeng, Wu, Bei
Format: Article
Language:English
Subjects:
Abrasion
Annealing
Chloride resistance
Cleaning
Contact angle
Corrosion effects
Corrosion prevention
Corrosion resistance
Diffraction patterns
Durability
Electron microscopy
Foils
Gold
Hydrophobic surfaces
Iron
Mechanical durability
Sandpaper
Self-cleaning
Self-propagating synthesis
Sodium chloride
Superhydrophobic
X-ray diffraction
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Summary:Well-defined gold nanoflower superhydrophobic surface (SHS) was constructed on iron foil by chemical deposition and anneal. The as-fabricated sample exerts excellent superhydrophobicity with water contact angle (WCA) up to 169°, a sliding angle of about 3°. The samples were characterized via scanning electron microscopy (SEM), X-ray diffraction pattern (XRD) and energy dispersive analysis of X-ray (EDX) to determine the morphology, structure and composition. The electrochemical measurements showed that the resultant surface displayed good corrosion resistance in 3.5 wt% sodium chloride aqueous solution. The effect of pH on the SHS and corrosion resistance ability of the samples at pH = 2, 7 and 9 were explored. The self-cleaning property of the SHS was analyzed. Also, the surface withstood abrasion by 400 grid SiC sandpaper for 2.0 m under 30 kPa, or water impacting for 120 min without losing its superhydrophobicity, indicating prominent mechanical durability. This successful manufacture of the gold SHS with anti-corrosion, self-cleaning, and mechanical durability can pave a prospective way for a variety of practical situations. [Display omitted] •Superhydrophobic Au surface was fabricated on iron substrate.•The growth process of the surface didn't use any organic modification.•Corrosion resistance, self-cleaning and mechanical durability were studied.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2017.09.007