Potentiodynamic study of Al–Mg alloy with superhydrophobic coating in photobiologically active/not active natural seawater

Benedetti, Alessandro; Cirisano, Francesca; Delucchi, M.; Faimali, Marco; Ferrari, Michele

doi:10.1016/j.colsurfb.2015.07.045

Cited by 18 publications

(13 citation statements)

References 60 publications

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“…The anticorrosion performance of coatings can be studied by polarization tests, and high barrier properties will greatly contribute to the improvement of corrosion protection of the coating . The tabulated data in Table clearly indicate the I coor value of WPU/CB/GO coatings is smaller than that of 316SS and WPU; meanwhile, the tendency of the corrosion potential shifting to more noble increases as the composite filler loadings increase in WPU/CB/GO nanocomposites coatings, suggesting the coating is passivated . This means that the prepared nanocomposites have significant active roles on the anticorrosion of 316SS.…”

Section: Resultsmentioning

confidence: 99%

“…[42][43][44][45] The tabulated data in Table III clearly indicate the I coor value of WPU/CB/GO coatings is smaller than that of 316SS and WPU; meanwhile, the tendency of the corrosion potential shifting to more noble increases as the composite filler loadings increase in WPU/CB/GO nanocomposites coatings, suggesting the coating is passivated. 46 This means that the prepared nanocomposites have significant active roles on the anticorrosion of 316SS. The improved anticorrosion performance of WPU/CB/ GO nanocomposite films ascribe to increased barrier ability of nanocomposite coatings where GO (whose layers are almost parallel to the surface of the composite photographed by SEM) makes great contribution (Figure 7).…”

Section: Contact Anglementioning

confidence: 97%

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WPU/CB/GO nanocomposites: in situ polymerization preparation, thermal, and anticorrosion performance evaluation

Hou

Zhou

2019

J of Applied Polymer Sci

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In this paper, composite fillers including graphene oxide and carbon black had been applied to modify pure waterborne polyurethane (WPU) and a new nanocomposite was prepared by in situ polymerization, whose structure was characterized by Fourier transform infrared spectroscopy that demonstrated interfacial interactions existing between the filler particles and the hard segments of WPU chains. Meanwhile, thermal properties of prepared nanocomposites were enhanced after adding composite fillers as shown in the results of thermogravimetric analysis and differential scanning calorimetry curves, which could be explained by several factors including strong interface interaction between organic phase and inorganic phase verified by infrared spectra and scanning electron microscopy as well as transmission electron microscopy, good dispersion and barrier effect of the composite fillers, reinforced crosslinking density of the system. Additionally, the contact angle and anticorrosion performance of the nanocomposite films were heightened after adding fillers. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48716.

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Section: Resultsmentioning

confidence: 99%

Section: Contact Anglementioning

confidence: 97%

WPU/CB/GO nanocomposites: in situ polymerization preparation, thermal, and anticorrosion performance evaluation

Hou

Zhou

2019

J of Applied Polymer Sci

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“…The superhydrophobic surface was produced by spray coating the PTFE-PS dispersion at room temperature and atmospheric conditions on a suitable substrate. For the purpose of this study, glass was used as a substrate (owing to its inertia with respect to the performed test) in the first campaign, and commercial aluminium alloy 5754 H111 (Al-5% Mg alloy) was used for the second campaign, as already done in our previous work with different SH coating composition and surface morphology not coming from recyclable materials [20]. More details regarding the first and second campaigns are provided successively.…”

Section: Materials and Surface Characterizationmentioning

confidence: 99%

“…Nevertheless, as discussed [20], entrapped air is reduced in underwater conditions by the action of organic matter reaching the metal surface, with the result being the loss of the Cassie-Baxter state to the Wenzel state [27].…”

Section: Fouling and Bubble Formationmentioning

confidence: 99%

Superhydrophobic Coatings from Recyclable Materials for Protection in a Real Sea Environment

2019

Self Cite

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Recyclable materials can be referred to as both those materials directly recycled from wastes and those derived from any kind of transformation before use. Highly water repellent coatings with wettability properties, known as superhydrophobic (SH), are related to surfaces with contact angles above 150° and a very small hysteresis. The small area available for these surfaces when in contact with water can be exploited in many applications in which interactions with an aqueous environment are usually desirable to be avoided, like for protection and friction reduction in a marine environment. SH coatings under investigation have been prepared starting from recyclable materials with the aim to provide a sustainable and low cost solution, with potential application to large surfaces in a marine environment. Wetting studies, surface characterization, and electrochemical tests show how these surfaces can be used in terms of fouling prevention and the protection of metals in underwater conditions.

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“…Ferrari's group prepared a superhydrophobic organic-inorganic coating by simply mixing fluoropolymer blend and fumed silica nanoparticles and then rapidly spraying onto glass or metal substrates, which contributed to the application of the superhydrophoic coatings in seawater [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of highly hydrophobic two-component thermosetting polyurethane surfaces with silica nanoparticles

Yang

Song

Hou

2018

Applied Surface Science

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Highly hydrophobic thermosetting polyurethane (TSU) surfaces with micro-nano hierarchical structures were developed by a simple process combined with sandpaper templates and nano-silica embellishment. Sandpapers with grit sizes varying from 240 to 7000 grit were used to obtain microscale roughness on an intrinsic hydrophilic TSU surface. The surface wettability was investigated by contact angle measurement. It was found that the largest contact angle of the TSU surface without nanoparticles at 102 ± 3°was obtained when the template was 240-grit sandpaper and the molding progress started after 45 min curing of TSU. Silica nanoparticles modified with polydimethylsiloxane were scattered onto the surfaces of both the polymer and the template to construct the desirable nanostructures. The influences of the morphology, surface composition and the silica content on the TSU surface wettability were studied by scanning electron microscopy (SEM), attenuated total reflection (ATR) infrared (IR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and contact angle measurements. The surface of the TSU/SiO2 nanocomposites containing 4 wt% silica 2 nanoparticles exhibited a distinctive dual-scale structure and excellent hydrophobicity with the contact angle above 150°. The mechanism of wettability was also discussed by Wenzel model and Cassie-Baxter model.

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Potentiodynamic study of Al–Mg alloy with superhydrophobic coating in photobiologically active/not active natural seawater

Cited by 18 publications

References 60 publications

WPU/CB/GO nanocomposites: in situ polymerization preparation, thermal, and anticorrosion performance evaluation

WPU/CB/GO nanocomposites: in situ polymerization preparation, thermal, and anticorrosion performance evaluation

Superhydrophobic Coatings from Recyclable Materials for Protection in a Real Sea Environment

Fabrication of highly hydrophobic two-component thermosetting polyurethane surfaces with silica nanoparticles

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