A new route for fabrication of the corrosion-resistant superhydrophobic surface by milling process

Zhu, Jiyuan; Hu, Xiaofang

doi:10.1007/s11998-018-0133-9

Cited by 15 publications

(5 citation statements)

References 20 publications

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“…Mechanical processing is one of the most effective means for stable and large-scale production. Milling is a mechanical processing method for cutting out the required shapes and features through a milling cutter rotating at a high speed on a lathe [ 22 ]. Previously, Rahman et al [ 23 ] studied the contact angle hysteresis and sliding behavior of water droplets on the surface of micro-groove brass obtained by milling and proved that the behavior of water droplets on the surface is closely related to periodic surface grooves obtained by micro-milling.…”

Section: Introductionmentioning

confidence: 99%

Study on Preparation of Superhydrophobic Copper Surface by Milling and Its Protective Performance

2022

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Using milling method, a 0.1 mm flat-bottom sharp knife was used to mill the surface of Cu substrate in a CNC engraving machine to construct the microstructure of rectangular bumps, and rectangular bumps with different sizes and different distances were prepared by changing the distance between cutter tips. After deburring and stearic acid modification, a superhydrophobic Cu surface with excellent mechanical durability and stability was successfully prepared. Through friction and wear experiments, the contact angle of the superhydrophobic Cu surface decreased slightly while retaining excellent corrosion resistance.

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Section: Introductionmentioning

confidence: 99%

Study on Preparation of Superhydrophobic Copper Surface by Milling and Its Protective Performance

2022

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“…For that reason, they need to be combined with a chemical surface modification as an extra step. Along with stearic acid surface modification, a microgrooved aluminum surface, which was manufactured by common milling methods, gained hydrophobic properties [18]. A dual-scale anisotropic hydrophobic surface was realized by combining mechanical broaching and chemical oxidation [19].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Influence of Machining Parameters and Surface Roughness on the Wettability of the Al6082 Surfaces Produced with WEDM

Skondras-Giousios,

Karmiris-Obratański,

Jarosz

et al. 2024

Materials

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Electrical Discharge Machining (EDM) is a non-conventional machining technique, capable of processing any kind of conductive material. Recently, it has been successfully utilized for producing hydrophobic characteristics in inherently hydrophilic metallic materials. In this work, Wire Electrical Discharge Machining (WEDM) was utilized for producing hydrophobic characteristics on the surface of the aluminum alloy 6082, and various parameters that can affect wettability were investigated. Adopting an orthogonal Taguchi approach, the effects of the process parameter values of peak current, pulse-on time, and gap voltage on the contact angles of the machined surfaces were investigated. After machining, all samples were observed to have obtained hydrophobic properties, reaching contact angles up to 132°. The peak current was identified as the most influential parameter regarding the contact angle, while the gap voltage was the less influential parameter. A contact angle variation of 30° was observed throughout different combinations of machining parameters. Each combination of the machining parameters resulted in a distinct surface morphology. The samples with moderate roughness values (3.4 μm > Sa > 5.7 μm) were found to be more hydrophobic than the samples with high or low values, where the contact angle was measured under 115°. In addition, the finite element modeling of the experimental setup, with parametric surfaces of uniform random and Perlin noise types of roughness, was implemented. Time dependent simulations coupling phase field and laminar flow for the modelingof the wetting of surfaces with different surface roughness characteristics showed that an increase in the Sa roughness and total wetted area can lead to an increase in the contact angle. The combination of experimental and computational results suggests that the complexity of the wettability outcomes of aluminum alloy surfaces processed with WEDM lies in the interplay between variations of the surface chemical composition, roughness, micro/nano morphology, and the surface capability of forming a composite air/water interface.

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“…Superhydrophobic surfaces can be fabricated by coating the material with a low free energy layer, by modifying the surface topography with features in the nano/microscale or by a combination of both approaches [ 5 , 6 , 7 , 8 , 9 ]. Up to now, such superhydrophobic surfaces, also called water-repellent surfaces, have been preferably fabricated by environmentally harmful chemical etching followed by passivation processes, by time-consuming milling methods, by cost-intensive CVD coating methods or by simple multi-steps methods—such as spin, spray, or dip coating—which have a modest throughput limiting their use for large area applications [ 10 , 11 , 12 , 13 , 14 , 15 ]. Although well-established photolithographic methods have also been employed to generate repetitive microfeatures able to tune the wettability characteristics on different materials, these processes involve multiple cleaning, coating and developing steps, as well as the use of hazardous chemicals and masks [ 12 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Stable Superhydrophobic Aluminum Surfaces Based on Laser-Fabricated Hierarchical Textures

et al. 2021

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Laser-microtextured surfaces have gained an increasing interest due to their enormous spectrum of applications and industrial scalability. Direct laser interference patterning (DLIP) and the well-established direct laser writing (DLW) methods are suitable as a powerful combination for the fabrication of single (DLW or DLIP) and multi-scale (DLW+DLIP) textures. In this work, four-beam DLIP and DLW were used independently and combined to produce functional textures on aluminum. The influence of the laser processing parameters, such as the applied laser fluence and the number of pulses, on the resulting topography was analyzed by confocal microscopy and scanning electron microscopy. The static long-term and dynamic wettability characteristics of the laser-textured surfaces were determined through water contact angle and hysteresis measurements, revealing superhydrophobic properties with static contact angles up to 163° and hysteresis as low as 9°. The classical Cassie–Baxter and Wenzel models were applied, permitting a deeper understanding of the observed wetting behaviors. Finally, mechanical stability tests revealed that the DLW elements in the multi-scale structure protects the smaller DLIP features under tribological conditions.

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A new route for fabrication of the corrosion-resistant superhydrophobic surface by milling process

Cited by 15 publications

References 20 publications

Study on Preparation of Superhydrophobic Copper Surface by Milling and Its Protective Performance

Study on Preparation of Superhydrophobic Copper Surface by Milling and Its Protective Performance

Investigation of the Influence of Machining Parameters and Surface Roughness on the Wettability of the Al6082 Surfaces Produced with WEDM

Stable Superhydrophobic Aluminum Surfaces Based on Laser-Fabricated Hierarchical Textures

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