Fabrication of superhydrophobic needle-like Ca-P coating with anti-fouling and anti-corrosion properties on AZ31 magnesium alloy

Wang, Liyuan; Xu, Xia; Liu, Enyang; Yu, Sirong; Yin, Xiaohong; Wang, Jun; Zhu, Guang; Li, Quan; Li, Jing

doi:10.1016/j.colsurfa.2021.126568

Cited by 48 publications

(16 citation statements)

References 50 publications

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“…The post-treatment procedure involves a simple immersion of the coated sample in a surfactant-containing solution. The most studied surfactant is stearic acid (STA), which has been applied on various conversion coatings including Mg(OH)2 formed by hydrothermal treatment [388][389][390], LDH [391,392], CaP conversion coating [199,393,394], phytate conversion coating [395], stannate conversion coating [396], Cr(III) conversion coating [135], and CaF2/MgF2 conversion coating [280]. The direct growth of Mg-Al LDH on the PEO-treated AZ91 alloy at atmospheric pressure was demonstrated in [373].…”

Section: Post-treatment On Conversion Coatingsmentioning

confidence: 99%

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: PART I—Pre-Treatment and Conversion Coating

et al. 2022

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Corrosion protection systems based on hexavalent chromium are traditionally perceived to be a panacea for many engineering metals including magnesium alloys. However, bans and strict application regulations attributed to environmental concerns and the carcinogenic nature of hexavalent chromium have driven a considerable amount of effort into developing safer and more environmentally friendly alternative techniques that provide the desired corrosion protection performance for magnesium and its alloys. Part I of this review series considers the various pre-treatment methods as the earliest step involved in the preparation of Mg surfaces for the purpose of further anti-corrosion treatments. The decisive effect of pre-treatment on the corrosion properties of both bare and coated magnesium is discussed. The second section of this review covers the fundamentals and performance of conventional and state-of-the-art conversion coating formulations including phosphate-based, rare-earth-based, vanadate, fluoride-based, and LDH. In addition, the advantages and challenges of each conversion coating formulation are discussed to accommodate the perspectives on their application and future development. Several auspicious corrosion protection performances have been reported as the outcome of extensive ongoing research dedicated to the development of conversion coatings, which can potentially replace hazardous chromium(VI)-based technologies in industries.

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Section: Post-treatment On Conversion Coatingsmentioning

confidence: 99%

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: PART I—Pre-Treatment and Conversion Coating

et al. 2022

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“…Water contact angle (WCA) with more than 150° on the surface is regarded to be a superhydrophobic surface, which has received a large number of studies in the research areas of self-cleaning, self-healing, anti-icing, anti-fouling, anti-corrosion, oil/water separation, and friction reduction [ 6 , 7 , 8 ]. Superhydrophobicity is usually a common accompaniment to suitable surface roughness with hierarchical microstructures/nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Zhu

Jiang

Liu

et al. 2021

Gels

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A superhydrophobic fluorinated silica functionalized chitosan (F-CS) aerogel is constructed and fabricated by a simple and sustainable method in this study in order to achieve highly efficient gravity-driven oil/water separation performance. The fluorinated silica functionalization invests the pristine hydrophilic chitosan (CS) aerogel with promising superhydrophobicity with a water contact angle of 151.9°. This novel F-CS aerogel possesses three-dimensional structure with high porosity as well as good chemical stability and mechanical compression property. Moreover, it also shows striking self-cleaning performance and great oil adsorption capacity. Most importantly, the as-prepared aerogels exhibits fast and efficient separation of oil/water mixture by the gravity driven process with high separation efficiency. These great performances render the prepared F-CS aerogel a good candidate for oil/water separation in practical industrial application.

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“…The value of F ad is directly related to the particle radius, assuming that F ad is linear with the particle radius R . Therefore, the relationship between F r z and ( F ad + G ) is expressed as F normalr normalz F ad + G = 2 π R r .25em sin 2 ( 90 ° + α 2 false| cos nobreak0em0.25em⁡ θ c false| ) ( k R + C ) + ρ g 4 3 π R 3 where k and C are coefficients and constants related to particle type and surface properties, respectively. According to the formula, when the sample tilted at a certain angle and the friction force was ignored, the value of F r z /( F ad + G ) was greater than 1 in a large range of R and k .…”

Section: Resultsmentioning

confidence: 99%

Superhydrophobic and Photocatalytic Synergistic Self-Cleaning Coating Constructed by Hierarchically Structured Flower-like Hollow SiO₂@TiO₂ Spheres with Oxygen Vacancies

Guo,

Bao,

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

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The self-cleaning coating has both superhydrophobic physical and photocatalytic chemical self-cleaning properties, which has attracted the wide attention of researchers in recent years. First, the flower-like hollow SiO 2 @TiO 2 spheres with oxygen vacancies (rFHSTs) were prepared by the liquid-phase reduction method, in which several different functional components were integrated. Meanwhile, the influence mechanisms of the physical structure and chemical composition on the photocatalytic properties are discussed in detail. The results proved that rFHSTs exhibited the enhanced photoresponse range and photocatalytic degradation performance in visible light because of the synergistic effect of the microstructure (internal cavity, 3D flower-like nanosheet), SiO 2 /TiO 2 heterojunction structure, and oxygen vacancies. After that, superhydrophobic modified rFHSTs were used as fillers to fabricate PVA/PFDTS-rFHSTs composite coatings with both physical and chemical selfcleaning properties. The self-cleaning performances and principles of the composite coating were examined and explored. The results showed that the low surface energy of the hydrophobic chain segment, the inherent particle effect, and the photocatalytic activity of rFHSTs were responsible for the superhydrophobic and photocatalytic effects, finally endowing the composite coating with selfcleaning performance. In short, this study is profound for the development and application of self-cleaning coatings with both physical and chemical performances.

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Fabrication of superhydrophobic needle-like Ca-P coating with anti-fouling and anti-corrosion properties on AZ31 magnesium alloy

Cited by 48 publications

References 50 publications

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: PART I—Pre-Treatment and Conversion Coating

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: PART I—Pre-Treatment and Conversion Coating

Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Superhydrophobic and Photocatalytic Synergistic Self-Cleaning Coating Constructed by Hierarchically Structured Flower-like Hollow SiO₂@TiO₂ Spheres with Oxygen Vacancies

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Fabrication of superhydrophobic needle-like Ca-P coating with anti-fouling and anti-corrosion properties on AZ31 magnesium alloy

Cited by 48 publications

References 50 publications

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: PART I—Pre-Treatment and Conversion Coating

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: PART I—Pre-Treatment and Conversion Coating

Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Superhydrophobic and Photocatalytic Synergistic Self-Cleaning Coating Constructed by Hierarchically Structured Flower-like Hollow SiO2@TiO2 Spheres with Oxygen Vacancies

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Product

Resources

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Superhydrophobic and Photocatalytic Synergistic Self-Cleaning Coating Constructed by Hierarchically Structured Flower-like Hollow SiO₂@TiO₂ Spheres with Oxygen Vacancies