Preparation of durable underwater superoleophobic Ti6Al4V surfaces by electrochemical etching

Wang, L. L.; Sun, Yuwen; Gao, Yuze; Guo, Dongming

doi:10.1080/02670844.2015.1108073

Cited by 8 publications

(6 citation statements)

References 41 publications

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“…Other known important factors are the applied voltage and current among others. Besides, thermal oxidation is another way of obtaining a titanium dioxide layer, frequently for biomedical purposes and applications [17,22]. Different crystalline phases may be obtained, especially by thermal oxidation, among which anatase has a better efficiency [23] regarding photocatalytic behaviour, but a mixture of anatase and rutile in a proper proportion, for instance, the relation of approximately 80/20 (anatase/rutile) that can be found in [24] or in [22], obtains better photocatalytic efficiency than oxides containing only anatase.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic behaviour of anodised titanium using different cathodes

Morán

Martínez

Merino

et al. 2019

Surface Engineering

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In the last decades, titanium dioxide (TiO 2) has been widely researched, because of its applications in photocatalytic environmental pollution removal and in hydrogen generation. Hence, this work deals with the synthesis of titanium dioxide by anodising titanium sheets, however using different cathodes, which may induce differences in the composition and structure of the obtained oxide layers so that these suspected differences can be observed. All specimens were equally thermally treated after anodising to enhance their photocatalytic activity since this step allows the titanium dioxide to crystallise. Their morphology and crystal structure were characterised by X-ray diffraction and FTIR, and optical properties were characterised by ultraviolet-visible absorption spectroscopy. Furthermore, tests of their photocatalytic properties in the degradation of organic dyes were performed in order to have a first evaluation. Indeed, differences in the photocatalytic behaviour of the anodised specimens using different cathodes were found and evaluated.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic behaviour of anodised titanium using different cathodes

Morán

Martínez

Merino

et al. 2019

Surface Engineering

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“…To this end, there has been considerable interest veloped exhibited excellent, long-term stability of wettability [5].…”

Section: Introductionmentioning

confidence: 99%

Under-Water Superoleophobicity of Heat Treated and Chemically Etched Hypoeutectic Aluminum- 8 wt.% Silicon Alloy

E¹,

W²,

J³

et al. 2019

Int J Metall Met Phys

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Hypoeutectic aluminum-silicon alloy consisting of 8.0 wt.% silicon and prepared through a solid-phase technique was studied for the contact angle behaviour of oil in underwater condition. The surface structure of the Al-8 wt.% Si hypoeutectic alloy was modified through a solutionizing heat treatment process at 650 °C for 6 hours, quenching in water and etching in Keller's reagent. The modified surface structure showed an increase with the etch time for sizes of the secondary arm-spacing (SAS), from 5.31 ± 2.54 μm to 6.16 ± 2.35 μm for 5 to 20 seconds of etching respectively. Equally, while the average surface roughness (R a) increased from 0.1 to 0.74 microns, the sizes of the secondary dendrites (SSD) reduced considerably with increase in the etch time. These alterations of the surface structure influenced the fractional surface area (f so) and the evaluated contact angles of oil drops at the solid-water interface. Therefore, a gradual increase in the contact angles of oil, to a maximum value of 159.96 ± 0.64, was noted for the Al-8 wt.% Si alloys after the solutionizing heat treatment, quenching and etching process, confirming significant underwater superoleophobicity.

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“…The trapped air leads to a decrease in f s , which improves the wettability and increases the contact angle. Figure 1 shows SEM images of the samples after surface modification at different etching times, which visually illustrate the microscopic morphology of the sample surface [ 34 ]. Figure 1 a demonstrates that the entire sample surface was characterised by its network structures, and the roughness of the surface was 0.692 μm.…”

Section: Resultsmentioning

confidence: 99%

Facile Electrochemical Method for the Fabrication of Stable Corrosion-Resistant Superhydrophobic Surfaces on Zr-Based Bulk Metallic Glasses

Zhang

Sun

et al. 2021

Molecules

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Both surface microstructure and low surface energy modification play a vital role in the preparation of superhydrophobic surfaces. In this study, a safe and simple electrochemical method was developed to fabricate superhydrophobic surfaces of Zr-based metallic glasses with high corrosion resistance. First, micro–nano composite structures were generated on the surface of Zr-based metallic glasses by electrochemical etching in NaCl solution. Next, stearic acid was used to decrease surface energy. The effects of electrochemical etching time on surface morphology and wettability were also investigated through scanning electron microscopy and contact angle measurements. Furthermore, the influence of micro–nano composite structures and roughness on the wettability of Zr-based metallic glasses was analysed on the basis of the Cassie–Baxter model. The water contact angle of the surface was 154.3° ± 2.2°, and the sliding angle was < 5°, indicating good superhydrophobicity. Moreover, the potentiodynamic polarisation test and electrochemical impedance spectroscopy suggested excellent corrosion resistance performance, and the inhibition efficiency of the superhydrophobic surface reached 99.6%. Finally, the prepared superhydrophobic surface revealed excellent temperature-resistant and self-cleaning properties.

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Preparation of durable underwater superoleophobic Ti6Al4V surfaces by electrochemical etching

Cited by 8 publications

References 41 publications

Photocatalytic behaviour of anodised titanium using different cathodes

Photocatalytic behaviour of anodised titanium using different cathodes

Under-Water Superoleophobicity of Heat Treated and Chemically Etched Hypoeutectic Aluminum- 8 wt.% Silicon Alloy

Facile Electrochemical Method for the Fabrication of Stable Corrosion-Resistant Superhydrophobic Surfaces on Zr-Based Bulk Metallic Glasses

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