Efficient protection of Mg alloy enabled by combination of a conventional anti-corrosion coating and a superamphiphobic coating

Wei, Jinfei; Li, Bucheng; Jing, Lingyun; Tian, Ning; Zhao, Xia; Zhang, Junping

doi:10.1016/j.cej.2020.124562

Cited by 160 publications

(57 citation statements)

References 50 publications

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“…However, the application of such alloys is limited essentially by their poor corrosion properties and fast degradation rate. 1,2 Thus, the surface treatment of Mg alloys is considered as one of the most effective ways to enhance the corrosion resistance of Mg alloys. A number of surface treatments have been applied in order to increase the corrosion resistance, including anodizing, 3 chemical conversion, 4 and thermal spraying.…”

Section: Introductionmentioning

confidence: 99%

Improving corrosion protection of Mg alloys (AZ31B) using graphene‐based hybrid coatings

Afsharimani

Talimian

Merino

et al. 2021

Int J of Appl Glass Sci

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In the present work, a study was carried out to compare the morphology and electrochemical properties of pure and graphene-modified hybrid silica solgel coatings deposited on anodized AZ31B magnesium alloys. The precursor solution was prepared using tetraethoxysilane (TEOS) and 3-glycidoxypropyltrimethoxysilane (GPTMS), with the addition of chemically modified graphene nanosheets (GN-chem). Homogeneous and adherent coatings were obtained using GPTMS-TEOS (GT) and GPTMS-TEOS-GN-chem (GT/GN-chem) solutions with uniform thickness around 4 µm. Raman, SEM images and EDS analyses confirmed the presence of graphene nanosheets in the coatings. Potentiodynamic polarization results using 0.05 M NaCl electrolyte solution showed that graphene containing silica coatings significantly improve the corrosion resistance of AZ31B alloys. In addition, a significant passive region was observed for GT/GN-chem coatings.

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Section: Introductionmentioning

confidence: 99%

Improving corrosion protection of Mg alloys (AZ31B) using graphene‐based hybrid coatings

Afsharimani

Talimian

Merino

et al. 2021

Int J of Appl Glass Sci

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“…The functional properties of the superhydrophobic coatings are usually characterized by the value of the contact angle produced by the droplets on the surface of these materials in a short period of time. However, if the superhydrophobic surfaces are used in the industrial field, it is necessary to study the characteristics and stability of the wetting behavior of the prepared superhydrophobic surface in long-term contact with an aqueous medium [14]. Therefore, the chemical durability of superhydrophobic surfaces to acidic, neutral, or alkaline aqueous solutions has been investigated by measuring the static water contact angle and sliding angle of the superhydrophobic surface before and after immersion in aqueous solutions of different pH values, and the results are shown in the Figure 6.…”

Section: Stability and Wear Resistance Of Superhydrophobic Surfacesmentioning

confidence: 99%

“…Numerous techniques have been developed and applied to develop of superhydrophobic coatings on Mg alloys, including the hydrothermal process, chemical deposition, electrodeposition techniques, conversion coatings, polymer coatings, sol-gel coatings, laser processing, etc. [10][11][12][13][14][15]. In general, two essential features are required to construct a superhydrophobic surface on Mg alloys, i.e., micro-nano hierarchical structure, and a low surface energy chemistry.…”

Section: Introductionmentioning

confidence: 99%

A Durable PVDF/PFOTES-SiO2 Superhydrophobic Coating on AZ31B Mg Alloy with Enhanced Abrasion Resistance Performance and Anti-Corrosion Properties

et al. 2021

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A simple and practical spray method is employed to prepare a PVDF/PFOTES-SiO2 superhydrophobic composite coating on the AZ31B Mg alloy substrate. The morphology, composition, and water contact angle (CA) were measured by Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FESEM) and contact angle measuring instrument. Hydrophilic nano-SiO2 is modified by PFOTES to obtain hydrophobicity. The influence of the mass of PFOTES-SiO2 to PVDF on the hydrophobic properties was studied. The wear resistance and stability of the composite coating have been investigated by immersion test, cross-cut adhesion test and friction test. Additionally, the corrosion resistance was measured by electrochemical workstation and salt spray corrosion test. The CA of PVDF/PFOTES-SiO2 coating is 161.3° and the sliding angle (SAs) is less than 2°. After 10× the sandpaper friction test, the superhydrophobic contact angle of the coating remained above 155°, and the sliding angle was less than 5°, which indicated that the prepared coating is a strong superhydrophobic coating with good wear resistance. The results of the electrochemical tests show that the superhydrophobic coating improved the anti-corrosion performance of Mg alloy, and the water contact angle is greater than 150° after 168 h salt spray corrosion test. Due to its excellent superhydrophobicity, wear resistance and anti-corrosion properties, the robust PVDF/PFOTES-SiO2 coating is considered to have great potential for future applications in the automotive and marine industries.

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“…Polymer-crystal composite particles formed by crystals coated with binders are widely used in the fields of medicine [1], energy [2,3], the chemical industry [4,5], and civil engineering [6,7]. Coatings can effectively improve the physical properties of materials, including their corrosion resistance [8][9][10], thermal conductivity [11], stiffness, and strength [12,13]. However, guaranteeing the stability and high energy density of polymer-crystal composite particles can be problematic.…”

Section: Introductionmentioning

confidence: 99%

Effect of Binder Coatings on the Fracture Behavior of Polymer–Crystal Composite Particles Using the Discrete Element Method

Wang

et al. 2021

Coatings

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Polymer–crystal composite particles formed by crystals coated with binders are widely used in the fields of medicine, energy, the chemical industry, and civil engineering. Binder content is an important factor in determining the mechanical behavior of composite particles. Therefore, this study aimed to investigate the underlying effect of binder coatings in the fracture micromechanics of polymer–crystal composite particles using the discrete element method (DEM). To achieve this objective, realistic particle and crystal shapes were first obtained and reconstructed based on X-ray micro-computed tomography (μCT) scanning and scanning electron microscope (SEM) images. A series of single particle crushing tests and DEM simulations were conducted on real and reconstructed polymer–crystal composite particles, respectively. Based on the experimental and DEM results, the effect of binder coatings on the crushing strength and crushing patterns of polymer–crystal composite particles was measured. Moreover, the micromechanics of the development and distribution of microcracks was further investigated to reveal the mechanism by which binder coatings affect polymer–crystal composite particles.

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Efficient protection of Mg alloy enabled by combination of a conventional anti-corrosion coating and a superamphiphobic coating

Cited by 160 publications

References 50 publications

Improving corrosion protection of Mg alloys (AZ31B) using graphene‐based hybrid coatings

Improving corrosion protection of Mg alloys (AZ31B) using graphene‐based hybrid coatings

A Durable PVDF/PFOTES-SiO2 Superhydrophobic Coating on AZ31B Mg Alloy with Enhanced Abrasion Resistance Performance and Anti-Corrosion Properties

Effect of Binder Coatings on the Fracture Behavior of Polymer–Crystal Composite Particles Using the Discrete Element Method

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