Fabrication of superhydrophobic surfaces for corrosion protection: A review

Ran, Minrui; Zheng, Wenyue; Wang, Huimin

doi:10.1080/02670836.2018.1560985

Cited by 62 publications

(27 citation statements)

References 71 publications

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“…However, a simple, cost-effective, and highly versatile method for the large-scale fabrication of superhydrophobic nanofibers is the electrospinning [ 18 ]. Hydrophobicity or superhydrophobicity are key surface properties for corrosion protection because they result in water and aqueous electrolyte repellence [ 19 ] and due to this, multiple research works can be found related to the fabrication of superhydrophobic surfaces for corrosion protection [ 20 , 21 ]. In addition, the use of low-cost and scalable techniques to fabricate superhydrophobic surfaces with multifunctional properties are of great interest for application as robust, self-healing barrier layers [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Designing Multifunctional Protective PVC Electrospun Fibers with Tunable Properties

et al. 2020

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In this work, the electrospinning technique is used for the fabrication of electrospun functional fibers with desired properties in order to show a superhydrophobic behavior. With the aim to obtain a coating with the best properties, a design of experiments (DoE) has been performed by controlling several inputs operating parameters, such as applied voltage, flow rate, and precursor polymeric concentration. In this work, the reference substrate to be coated is the aluminum alloy (60661T6), whereas the polymeric precursor is the polyvinyl chloride (PVC) which presents an intrinsic hydrophobic nature. Finally, in order to evaluate the coating morphology for the better performance, the following parameters—such as fiber diameter, surface roughness (Ra, Rq), optical properties, corrosion behavior, and wettability—have been deeply analyzed. To sum up, this is the first time that DoE has been used for the optimization of superhydrophobic or anticorrosive surfaces by using PVC precursor for the prediction of an adequate surface morphology as a function of the input operational parameters derived from electrospinning process with the aim to validate better performance.

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Section: Introductionmentioning

confidence: 99%

Designing Multifunctional Protective PVC Electrospun Fibers with Tunable Properties

et al. 2020

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“…The corrosion protection efficiency from Tafel polarization curves was calculated by the following formula [ 46 , 47 ]:

…”

Section: Methodsmentioning

confidence: 99%

The Role of the Fiber/Bead Hierarchical Microstructure on the Properties of PVDF Coatings Deposited by Electrospinning

et al. 2021

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Among the various polymeric options employed for the deposition of electrospun coatings, poly(vinylidene fluoride) (PVDF) has been widely investigated thanks to its excellent mechanical properties, high chemical resistance, and good thermal stability. In this work, the electrospinning technique is used for the fabrication of functional PVDF fibers in order to identify and evaluate the influence of the experimental conditions on the nanofiber properties in terms of optical transmittance, wettability, corrosion resistance, and surface morphology. Some of these properties can play a relevant role in the prevention of ice formation in aircrafts. According to this, a matrix of 4 × 4 samples of aluminum alloy AA 6061T6 was successfully coated by controlling two operational input parameters such as the resultant applied voltage (from 10 up to 17.5 KV) and the flow rate (from 800 up to 1400 µL/h) for a fixed polymeric precursor concentration (15 wt.%). The experimental results have shown a multilevel fiber-bead structure where the formation of a fiber mesh directly depends on the selected operational parameters. Several microscopy and surface analysis techniques such as confocal microscopy (CM), field emission scanning electron microscopy (FE-SEM), UV/vis spectroscopy, and water contact angle (WCA) were carried out in order to corroborate the morphology, transmittance, and hydrophobicity of the electrospun fiber composite. Finally, the corrosion behavior was also evaluated by electrochemical tests (Tafel curves measurement), showing that the presence of electrospun PVDF fibers produces a relevant improvement in the resultant corrosion resistance of the coated aluminum alloys.

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“…In this context, numerous methods have recently been suggested to design super-hydrophobic hierarchical surfaces inspired by nature [2,3]. The superhydrophobic surfaces represent an interesting approach to maximizing the resistance to corrosion of materials usually sensitive to corrosion degradation, particularly aluminum and its alloys, by the dint in their capacity to reduce the interaction between metallic surfaces and liquids [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Self-Assembled Silane Monolayers on Hierarchical 6082 Aluminum Alloy for Anti-Corrosion Applications

2020

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In this work, a two-stage methodology to design super-hydrophobic surfaces was proposed. The first step consists of creating a rough nano/micro-structure and the second step consists of reducing the surface energy using octadecyltrimethoxysilane. The surface roughening was realized by three different short-term pretreatments: (i) Boiling water, (ii) HNO3/HCl etching, or (iii) HF/HCl etching. Then, the surface energy was reduced by dip-coating in diluted solution of octadecyltrimethoxysilane to allow the formation of self-assembled silane monolayers on a 6082-T6 aluminum alloy surface. Super-hydrophobic aluminum surfaces were investigated by SEM-EDS, FTIR, profilometry, and contact and sliding angles measurements. The resulting surface morphologies by the three approaches were structured by a dual hierarchical nano/micro-roughness. The surface wettability varied with the applied roughening pretreatment. In particular, an extremely high water contact angle (around 180°) and low sliding angle (0°) were evidenced for the HF/HCl-etched silanized surface. The results of electrochemical tests demonstrate a remarkable enhancement of the aluminum alloy corrosion resistance through the proposed superhydrophobic surface modifications. Thus, the obtained results evidenced that the anti-wetting behavior of the aluminum surface can be optimized by coupling an appropriate roughening pretreatment with a self-assembled silane monolayer deposition (to reduce surface energy) for anticorrosion application.

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Fabrication of superhydrophobic surfaces for corrosion protection: A review

Cited by 62 publications

References 71 publications

Designing Multifunctional Protective PVC Electrospun Fibers with Tunable Properties

Designing Multifunctional Protective PVC Electrospun Fibers with Tunable Properties

The Role of the Fiber/Bead Hierarchical Microstructure on the Properties of PVDF Coatings Deposited by Electrospinning

Superhydrophobic Self-Assembled Silane Monolayers on Hierarchical 6082 Aluminum Alloy for Anti-Corrosion Applications

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