Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 427, Issue -, Pages 1-6Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2013.02.067
Keywords
Adhesion; Superhydrophobic; High strength; One-step electrodeposition; Without chemical modification
Categories
Funding
- National Nature Science Foundation of China [51105356]
- Zhejiang province Nature Science Foundation [Y4110283]
- Ningbo municipal Nature Science Foundation [2011A610160]
- Outstanding Talent Recruiting Program [2009A31004]
- Advanced Coatings and thin films innovation team Program
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High mechanical strength superhydrophobic Ni-Cu-P alloy coatings with strong adhesion force were one-step galvanostatically electrodeposited onto low alloy steel substrates, from a citrate- and sulphate-based bath. Surface morphologies of as-deposited Ni-Cu-P coatings were investigated by Scanning Electron Microscope (SEM). The chemical composition, structure, mechanical properties and adhesive/hydrophobic properties of coatings were characterized by energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), nano-indenter, and contact angle meter, respectively. Results showed that Ni-Cu-P coatings had cauliflower-like micro-nano structures and exhibited stable hydrophobicity under different pH values and high adhesive properties without any chemical modification. Hardness test results showed that hydrophobic Ni-Cu-P alloy coatings exhibited a high hardness of about 8.5 GPa. The deposition process of coatings was proposed to illustrate the formation of cauliflower-like micro-nano structures. The mechanism of the hydrophobic and high adhesion characteristic of this surface was explained by Cassie impregnating model. This method of fabricating hydrophobic surface has potential in practical applications such as micro-droplet transportation, corrosion protection and nano patterning. (C) 2013 Elsevier B.V. All rights reserved.
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