Roll-to-Roll Manufacturing of Robust Superhydrophobic Coating on Metallic Engineering Materials

Dong, Shengfu; Wang, Zhenlong; Wang, Yukui; Bai, Xia; Fu, Yong Qing; Guo, Bo; Tan, Chaoliang; Zhang, Jia; Hu, PingAn

doi:10.1021/acsami.7b16251

Cited by 45 publications

(22 citation statements)

References 58 publications

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“…Instead, the CA can reach or even exceed 150 • by modifying the rough structures with low-surface-energy materials. Therefore, the key to preparing an SHS is the formation of a rough structure and a reduction in surface energy [15]. A large number of approaches were successfully used to develop superhydrophobic surfaces, including chemical etching [16], solution immersion [17], and laser machining [18].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Self-Cleaning Superhydrophobic Surfaces with Improved Corrosion Resistance on 6061 Aluminum Alloys

Dong

Meng

et al. 2020

Micromachines

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Aluminum alloys are widely used, but they are prone to contamination or damage under harsh working environments. In this paper, a self-cleaning superhydrophobic aluminum alloy surface with good corrosion resistance was successfully fabricated via the combination of sand peening and electrochemical oxidation, and it was subsequently covered with a fluoroalkylsilane (FAS) film. The surface morphology, surface wettability, and corrosion resistance were investigated using a scanning electron microscope (SEM), an optical contact angle measurement, and an electrochemical workstation. The results show that binary rough structures and an FAS film with a low surface energy on the Al alloy surfaces confer good superhydrophobicity with a water contact angle of 167.5 ± 1.1 • and a sliding angle of 2.5 ± 0.7 • . Meanwhile, the potentiodynamic polarization curve shows that the corrosion potential has a positively shifted trend, and the corrosion current density decreases by three orders of magnitude compared with that of the original aluminum alloy sample. In addition, the chemical stability of the as-prepared superhydrophobic surface was evaluated by dripping test using solutions with different pH values for different immersion time. It indicates that the superhydrophobic surface could provide long-term corrosion protection for aluminum alloys. Consequently, the as-prepared superhydrophobic surface has excellent contamination resistance and self-cleaning efficacy, which are important for practical applications.

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Section: Introductionmentioning

confidence: 99%

Fabrication of Self-Cleaning Superhydrophobic Surfaces with Improved Corrosion Resistance on 6061 Aluminum Alloys

Dong

Meng

et al. 2020

Micromachines

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“…The Nyquist plots and Bode plots of the titanium surfaces at different processes are shown in Figure 9 b,c. In Nyquist plots, the impedance semicircle diameter is related to polarization resistance, and a larger impedance semicircle diameter represents better corrosion resistance [ 24 , 47 ]. Significantly, the impedance semicircle diameter of the as-prepared superhydrophobic surface increases sharply, approaching ten thousand kΩ·cm 2 ( Figure 9 b), about 16 times compared to the original surface.…”

Section: Resultsmentioning

confidence: 99%

“…Electrical discharge machining (EDM) is a non-contact machining technology as well as an effective method for difficult-to-cut material [ 23 ]. Furthermore, the surface morphology of an EDM machined surface is beneficial for establishing a superhydrophobic surface [ 24 ]. William et al found that the steel surface was a superhydrophobic surface, then machined micro-mushroom re-entrant structures using micro wire EDM [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of a Superhydrophobic Surface with Robust Micro-/Nanoscale Hierarchical Structures on Titanium Substrate

Dong

Wang

et al. 2020

Nanomaterials

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A superhydrophobic surface with robust structures on a metallic surface could improve its application in various harsh conditions. Herein, we developed a new strategy to fabricate robust micro-/nanoscale hierarchical structures with electrical discharge machining and electrochemical etching on a titanium substrate. After modification by fluorinated silane, the static water contact angle and slide angle of the surface could reach 162 ± 2° and 4 ± 1°, respectively. The superhydrophobic surfaces showed good corrosion resistance and mechanical stability after scratching with sandpapers. In addition, the superhydrophobic surfaces had good self-cleaning performance even in an acidic environment as well as the potential to be used as guiding tracks in droplet microfluidics and lab-on-a-chip systems. These results are expected to be helpful in designing the surface of liquid float gyroscope parts.

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“…The data shows that, after laser cleaned surface, the anticorrosion potential of is improved when compared with the polished 5A06 aluminum block surface, while the corrosion current density reduced. The previous research shows the thickness of the rust layer has great influence on the corrosion current density [50]. The E corr of the polished 5A06 aluminum block surface was −9.03 × 10 −1 V, in contrast, the E corr of the partially damaged paint layer and the laser treated 5A06 aluminum surface at an intensity of 11.9 W/cm 2 were −8.61 × 10 −1 and −6.39 ×10 −1 V, correspondingly.…”

Section: Samplementioning

confidence: 99%

Paint Removal on the 5A06 Aluminum Alloy Using a Continuous Wave Fiber Laser

Yang

Wang

et al. 2019

Coatings

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Paint removal is an important part of ship and marine engineering ship processing. Aluminum alloy is extremely vital in the field of shipbuilding, due to its high strength and strong corrosion resistance ability. Therefore, the cleaning quality of aluminum alloy is a key factor in the service life of the ship. In this paper, the research about continuous wave (CW) laser cleaning technique is employed to clean the paint on the substrate of aluminum alloy. The track width and depth of laser ablated craters are measured to study the removal rates. The analysis of CW laser cleaning is performed to explain the removal process that is theoretically based on the cleaning model, temperature, and the thermal stress profiles. The parametric and morphological studies indicate that the cleaned surface of aluminum alloy could be achieved at proper parameters. The performance of the laser cleaned surface at an intensity of 11.9 W/cm2 has better corrosion resistance and surface roughness. Therefore, the experimental results were considered to provide more completed and further understandings of interaction mechanism between the laser and paint on the aluminum alloy substrate, which could make some contributions to the development of laser manufacturing.

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Roll-to-Roll Manufacturing of Robust Superhydrophobic Coating on Metallic Engineering Materials

Cited by 45 publications

References 58 publications

Fabrication of Self-Cleaning Superhydrophobic Surfaces with Improved Corrosion Resistance on 6061 Aluminum Alloys

Fabrication of Self-Cleaning Superhydrophobic Surfaces with Improved Corrosion Resistance on 6061 Aluminum Alloys

Facile Fabrication of a Superhydrophobic Surface with Robust Micro-/Nanoscale Hierarchical Structures on Titanium Substrate

Paint Removal on the 5A06 Aluminum Alloy Using a Continuous Wave Fiber Laser

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