Superhydrophobic Films with Enhanced Corrosion Resistance and Self-Cleaning Performance on an Al Alloy

He, Zeqiang; Zeng, Yanwei; Zhou, Miaomiao; Min, Yulin; Shen, Xixun; Xu, Qing

doi:10.1021/acs.langmuir.0c03222

Cited by 38 publications

(25 citation statements)

References 75 publications

(132 reference statements)

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“…In a recently published paper by Zihao He et al, aluminum chloride hexahydrate and N-dodecyltrimethoxysilane (DTMS) in ethanol was used as electrolyte solution for the fabrication of a superhydrophobic surface with WSCA 155 • and 99.9% corrosion resistance when immersed inside a 3.5 wt% NaCl solution. This excellent anticorrosion behavior remained above 98% even after 30 days of immersion [76].…”

Section: Electrodepositionmentioning

confidence: 80%

A Review of Fabrication Methods, Properties and Applications of Superhydrophobic Metals

et al. 2021

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Hydrophobicity and superhydrophobicity with self-cleaning properties are well-known characteristics of several natural surfaces, such as the leaves of the sacred lotus plant (Nelumbo nucifera). To achieve a superhydrophobic state, micro- and nanometer scale topography should be realized on a low surface energy material, or a low surface energy coating should be deposited on top of the micro-nano topography if the material is inherently hydrophilic. Tailoring the surface chemistry and topography to control the wetting properties between extreme wetting states enables a palette of functionalities, such as self-cleaning, antifogging, anti-biofouling etc. A variety of surface topographies have been realized in polymers, ceramics, and metals. Metallic surfaces are particularly important in several engineering applications (e.g., naval, aircrafts, buildings, automobile) and their transformation to superhydrophobic can provide additional functionalities, such as corrosion protection, drag reduction, and anti-icing properties. This review paper focuses on the recent advances on superhydrophobic metals and alloys which can be applicable in real life applications and aims to provide an overview of the most promising methods to achieve sustainable superhydrophobicity.

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Section: Electrodepositionmentioning

confidence: 80%

A Review of Fabrication Methods, Properties and Applications of Superhydrophobic Metals

et al. 2021

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“…Many research efforts have been focused on the fabrication of hydrophobic metal surfaces by lowering their surface energy via chemical treatments (e.g., fluorinated silane), as well as increasing surface roughness (e.g., micro–nano hierarchical structure). − As also observed in natural structures, penguins’ body seldomly adheres ice or frost even in the coldest environment because their feathers contain micro–nano rough hierarchical structures, which promote hydrophobicity . In these hierarchical structures, a large amount of trapped airbags are formed within the micro–nano bulges; thus, liquid droplets are difficult to wet the surface .…”

Section: Introductionmentioning

confidence: 99%

Durable and Flexible Hydrophobic Surface with a Micropatterned Composite Metal–Polymer Structure

Chen

Luo

et al. 2021

Langmuir

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Hydrophobic metallic surfaces have attracted much academic and industrial interest due to their promising applications in various fields. Typically, hydrophobicity in metallic materials can be realized by micro/nanostructures and chemical treatment. However, both fragile rough surfaces and low-surface-energy fluorinated silanes are prone to wear and abrasion, leading to the loss of hydrophobicity. In this experiment, we demonstrated a facile and potentially low-cost methodology to fabricate hydrophobic surfaces by integrating a mechanically durable nickel skeleton with an interconnected microwall array filled with hydrophobic poly(tetrafluoroethylene) (PTFE). The interconnected metal frames prevented the removal of the hydrophobic material by abradants, and good hydrophobicity was preserved after more than 1000 cycles of linear abrasion under a local pressure of ∼0.12 MPa. The fabricated surfaces exhibited enhanced anti-icing properties with water droplets compared to unprocessed nickel surfaces. The prepared surfaces also showed superior flexibility. No obvious fracture was observed even after 300 cycles of buckling while the hydrophobic performance was still maintained. The surfaces designed here could provide effective guidance to manufacture large-area surfaces in nickel and other metallic materials that require flexibility, hydrophobic properties, and anti-icing functions for harsh applications.

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“…The surfaces were damaged after 400 grit SiC sandpaper abrasion under 16 kPa for 110 cm. He et al 15 demonstrated superhydrophobic aluminum surfaces through electrodeposition, and superhydrophobicity was lost after sliding against a 600 grit SiC sandpaper for 60 cm. Wang et al 25 constructed superhydrophobic surfaces on stainless steel by laser microprocessing.…”

Section: Introductionmentioning

confidence: 99%

“…Superhydrophobic materials, which can impede the spreading of water droplets, have shown enormous potential in a wide range of applications. − Studies have demonstrated various superhydrophobic coatings that are preliminarily utilized in self-cleaning, , anti-icing, antifouling, energy harvesting, , drag reduction, droplet transporting, anticorrosion, and other aspects, yielding great industrial application value. The superhydrophobic surface refers to a solid surface with a static water contact angle greater than 150° .…”

Section: Introductionmentioning

confidence: 99%

Micropatterned Amorphous Zr-Based Alloys Coated with Silica Nanoparticles as Superhydrophobic Surfaces against Abrasion

Luo

Sun

et al. 2021

ACS Appl. Nano Mater.

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Superhydrophobic metallic surfaces with mechanical stability as well as self-cleaning and anticorrosion functions are highly desirable because of their promising applications in various aspects. Large apparent water contact angles (≥150°) on metal surfaces are usually realized by high surface roughness and low surface energy. However, rough nanoscale features and low-energy coatings are prone to wear, causing degradation of the local wetting property during service. Herein, we develop a low-cost and scalable fabrication methodology to prepare composite superhydrophobic surfaces (water contact angle ∼154.7± 2.3°and sliding angle ∼1.2 ± 0.2°) by integrating a micropatterned amorphous alloy frame with functionalized nanoparticles. Amorphous interconnected microwalls provide augmented resistance against abrasion, whereas spray-coated nanomaterials residing within the frame impart water repellency. Metallic surfaces can withstand abrasion against sandpaper for 40 m under a local pressure of 120 kPa, before losing their perfect superhydrophobic performances. The composite surfaces also maintain its water repellency after mechanical bending, knife scratching, water impact jetting, ultraviolet (UV) irradiation, and acid immersion. We envisage that the design strategies here provide a practical route to manufacture water-repellent surfaces with metallic glass in harsh nautical applications.

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Superhydrophobic Films with Enhanced Corrosion Resistance and Self-Cleaning Performance on an Al Alloy

Cited by 38 publications

References 75 publications

A Review of Fabrication Methods, Properties and Applications of Superhydrophobic Metals

A Review of Fabrication Methods, Properties and Applications of Superhydrophobic Metals

Durable and Flexible Hydrophobic Surface with a Micropatterned Composite Metal–Polymer Structure

Micropatterned Amorphous Zr-Based Alloys Coated with Silica Nanoparticles as Superhydrophobic Surfaces against Abrasion

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