Superhydrophobic and smart MgAl-LDH anti-corrosion coating on AZ31 Mg surface

Huang, Manyi; Lu, Guodong; Pu, Jibin; Qiang, Yujie

doi:10.1016/j.jiec.2021.07.031

Cited by 58 publications

(24 citation statements)

References 58 publications

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“…The superhydrophobic surface with the micro−nano structure and the low surface energy can easily form a stable air cushion, substantially reducing the contact area between the corrosive media and the coating. 53 However, the air cushion gradually diminishes as the immersion proceeds, resulting in the aggressive solution penetrating into the DES coating. The DES coating then acts as a physical barrier and extends the diffusion path, preventing the penetration of corrosive media.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Eco-Friendly Superhydrophobic Coupling Conversion Coating with Corrosion Resistance on Magnesium Alloy

Wei

Wang

et al. 2023

Langmuir

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An eco-friendly superhydrophobic conversion coating is fabricated to enhance the corrosion resistance of the AZ31B Mg alloy by combining the deep eutectic solvent pretreatment and electrodeposition. The coral-like micro−nano structure formed by reacting deep eutectic solvent and Mg alloy provides a structural basis for constructing a superhydrophobic coating. Cerium stearate with low surface energy is deposited on the structure, providing the coating's superhydrophobicity and the corrosion inhibition effect. Electrochemical test results demonstrate that the as-prepared superhydrophobic conversion coating (water contact angle at 154.7°) with a 99.68% protection effect significantly improves anticorrosion properties for the AZ31B Mg alloy. The corrosion current density decreases from 1.79 × 10 −4 A•cm −2 of Mg substrate to 5.57 × 10 −7 A•cm −2 of the coated sample. Besides, the electrochemical impedance modulus reaches the value of 1.69 × 10 3 Ω•cm 2 and increases approximately 23 times in magnitude compared with the Mg substrate. Furthermore, the corrosion protection mechanism is attributed to the coupling effect of water-repellency barrier protection and corrosion inhibition, resulting in excellent corrosion resistance. Results demonstrate a promising strategy for the corrosion protection of Mg alloys by replacing the chromate conversion coating with the superhydrophobic coupling conversion coating.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Eco-Friendly Superhydrophobic Coupling Conversion Coating with Corrosion Resistance on Magnesium Alloy

Wei

Wang

et al. 2023

Langmuir

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“…It is consistent with reports in related references. 31 This indicates that we have obtained LDH with a typical layered structure. Figure 3b is the XRD pattern of intercalated hydrotalcite as a corrosion inhibitor.…”

Section: Composition Analysis Of Film Surfacementioning

confidence: 87%

Superhydrophobic Corrosion Inhibitor Intercalated Hydrotalcite Coating for Enhanced Corrosion Resistance of the Aluminum

Liu

Huang

Guo

2023

ACS Appl. Eng. Mater.

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Based on the ion exchange properties of hydrotalcite, dense hydrotalcite films with citric acid or tetraborate ions were prepared by a one-step hydrothermal method on aluminum flake, and superhydrophobic modified by sodium laurate to obtain a superhydrophobic corrosion resistant film with a water contact angle of about 154°and a sliding angle of less than 5°. The super hydrophobicity of the film can greatly slow down the infiltration of water and corrosive ions. The LDHs can release corrosion inhibitor ions to promote the formation of the passivation layer and can absorb chloride ions to reduce the corrosion of the metal. In addition, a very uniformly grown hydrotalcite film was obtained using urea. Electrochemical analysis of the coating after immersion in 3.5 wt % NaCl solution has shown that U-LDH-SC/SL film has the most positive corrosion potential (−0.056 eV), the best corrosion resistance, and long-term stability, which is related to the larger layer spacing and more uniform growth.

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“…This is due to the air trapped within the grooves that are available on the SH surface 105 . This trapped air that is present in between the coating reduces the possible area for the bacteria to adhere 106 and therefore, bacterial colonization can be inhibited. Apart from the SH property, the NPs introduced to impart suitable surface roughness is selected in such a way that they have inherent bactericidal activity.…”

Section: Sh Fabricsmentioning

confidence: 99%

A review focused on the superhydrophobic fabrics with functional properties

Shilpa

Sri

Robert³

et al. 2023

J of Applied Polymer Sci

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Superhydrophobic (SH) property is a naturally occurring phenomenon that has a wide range of potential applications such as antiicing, anticorrosion, electrowetting, blood typing, and so forth, and therefore, inspires the researchers to mimic them over artificial surfaces to achieve desired properties.Low surface energy and suitable surface roughness are the two key factors that play a vital role in developing SH surfaces. Hence, when the target substrate is introduced with suitable roughness and consequently functionalized with low surface energy, SH can be incorporated. Owing to the SH's wide range of inherent properties such as stain-resistant, self-cleaning, flame retardant, oil/water separation, and so forth as well as tunable functionalities such as electrical conductivity, photocatalytic activity, UV-protection, and so forth, the development of SH fabrics has gained a lot of research attention in recent years. In this context, the present review focuses on the different applications of SH fabrics and their recent research progress.

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Superhydrophobic and smart MgAl-LDH anti-corrosion coating on AZ31 Mg surface

Cited by 58 publications

References 58 publications

Eco-Friendly Superhydrophobic Coupling Conversion Coating with Corrosion Resistance on Magnesium Alloy

Eco-Friendly Superhydrophobic Coupling Conversion Coating with Corrosion Resistance on Magnesium Alloy

Superhydrophobic Corrosion Inhibitor Intercalated Hydrotalcite Coating for Enhanced Corrosion Resistance of the Aluminum

A review focused on the superhydrophobic fabrics with functional properties

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