Active corrosion protection by a smart coating based on a MgAl-layered double hydroxide on a cerium-modified plasma electrolytic oxidation coating on Mg alloy AZ31

Zhang, Gen; Wu, Liang; Tang, Aitao; Ma, Yuanyuan; Song, Guang‐Ling; Zheng, Dajiang; Jiang, Bin; Atrens, Andrej; Pan, Fusheng

doi:10.1016/j.corsci.2018.05.010

Cited by 307 publications

(88 citation statements)

References 55 publications

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“…As to the pure LDH, the broad peak emerging at 3450 cm −1 belongs to ─OH and interlaminar water molecules stretching vibrations, and the sharp peaks located at 1358 and 787 cm −1 are assigned to interlaminar anionic CO 3 2− . Additionally, the other typical peaks at 676, 546, and 461 cm −1 are ascribed to the Al─O and Mg─O, which arises from octahedral structural . As to the GO/LDH hybrids, both the absorption peaks of GO and LDH can be observed in the spectrum, indicating that the LDH have been successfully self‐assembled on the GO surface.…”

Section: Resultsmentioning

confidence: 94%

“…Additionally, the other typical peaks at 676, 546, and 461 cm −1 are ascribed to the Al─O and Mg─O, which arises from octahedral structural. [45][46][47] As to the GO/LDH hybrids, both the absorption peaks of GO and LDH can be observed in the spectrum, indicating that the LDH have been successfully self-assembled on the GO surface. Al─O bonds, respectively.…”

Section: Permeation Performance Of Membranesmentioning

confidence: 95%

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Preparation of stable and superior flux GO/LDH/PDA‐based nanofiltration membranes through electrostatic self‐assembly for dye purification

Zhong

Wang

et al. 2019

Polymers for Advanced Techs

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Graphene oxide (GO) has triggered significant attention as a new type of self‐assembly membrane material. However, the low filtration flux and unstable performance of GO membrane limit its practical application. Hence, in this work, layered double hydroxides (LDHs), as a 2D material with double‐layer channel structure and positive electricity, were self‐assembled with GO at weight ratio of 7:3 by electrostatic interaction. Then, the GO/LDH hybrids combined with polydopamine (PDA) to obtain stable and high‐flux GO‐based membranes through vacuum filtration and the structure and morphology of as‐prepared samples were characterized by FT‐IR, XRD, XPS, and SEM. Furthermore, the separation performance and surface electronegativity of membranes were tested via pure water flux, rejection efficiency, recycle experiments, and zeta potential. Results revealed that the stability and flux of composite membrane were enhanced significantly compared with neat GO‐based membrane. Further, the dye rejection rate of methylene blue (MB) is higher than Congo red (CR) and rhodamine B (Rh B) and reached to 99.8%.

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Section: Resultsmentioning

confidence: 94%

Section: Permeation Performance Of Membranesmentioning

confidence: 95%

Preparation of stable and superior flux GO/LDH/PDA‐based nanofiltration membranes through electrostatic self‐assembly for dye purification

Zhong

Wang

et al. 2019

Polymers for Advanced Techs

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“…After ALD-deposited GaN/Al 2 O 3 film, it can be seen in figure 10(c) that two well defined time constants arise in the frequency-phase angle diagram, which is coherent to the two capacitive loops in figure 11(a). It also indicates that the GaN/Al 2 O 3 composite film induce another corroded mode to Mg alloy [35]. Table 2.…”

Section: Electrochemical Testmentioning

confidence: 93%

“…It can be seen initially that GaN/Al 2 O 3 composite film exhibits good corrosion resistance. All these results show that the condense GaN/Al 2 O 3 film can largely hinder Cl − permeation and improve corrosion resistance [35,36]. In addition, the polarization resistance (R p ) is calculated using simplified Stern-Geary relationship to evaluate the corrosion rate, as shown in follow (equation (2)) [37]: In which β a is the anode Tafel slope and β c is the cathodic Tafel slope.…”

Section: Electrochemical Testmentioning

confidence: 99%

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Microstructure and corrosion behaviors of AZ31 alloy with an amorphous-crystallin nano-composite film

Liu

et al. 2020

Mater. Res. Express

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Magnesium (Mg) alloy has drawn considerable attention for lightweight structural and functional materials, whereas its corrosion resistance still requires to be enhanced. A new strategy for corrosion resistance has been proposed as making an amorphous-crystalline nano-composite film on Mg alloys. The film as the composition as Al 2 O 3 /GaN with a thickness of 20 nm was prepared on AZ31 Mg alloy by atomic layer deposition. Grazing incidence x-ray diffraction, scanning electron microscopy equipped with energy-dispersive spectroscopy, transmission electron microscopy, x-ray photoelectron spectroscopy, and nano indentation tester have been used to characterize the film in details. It is verified the sample has an amorphous/crystalline/Mg interface structure, and a surface with homogeneous elemental distribution and higher hardness. Neutral salt spray test shows the film changes the corroded mode from pitting corrosion to uniform corrosion. Furthermore, electrochemical measurements indicate that the film would raise E corr (ΔE corr =+0.295 V), drop i corr (about 1/10 times), and make electrical equivalent circuits change from R s (CPE R ct (R L L)) to R s (CR f ) (CPE R ct (R L L)). All evaluations show that better corrosion resistance has been by inducing the amorphouscrystalline nano film. The amorphous layer in the film would make a more homogeneous Cl − distribution in the surface and act as a barrier to block the penetration of corrosion medium in the early stage. During corrosion, the interface between the layers in the film could retard the corrosion crack propagating further. The film would be favorate to form a denser corrosion product layer finally. A more uniform and lower corrosion occurs for AZ31 Mg alloy with this nano-composite film.

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Smart Epoxy Composites

Eslami‐Farsani

Ebrahimnezhad‐Khaljiri

2021

Epoxy Composites

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Active corrosion protection by a smart coating based on a MgAl-layered double hydroxide on a cerium-modified plasma electrolytic oxidation coating on Mg alloy AZ31

Abstract: corrosion protection by a smart coating based on a MgAl-layered double hydroxide on a cerium-modified plasma electrolytic oxidation coating on Mg alloy AZ31, Corrosion Science (2010),

Cited by 307 publications

References 55 publications

Preparation of stable and superior flux GO/LDH/PDA‐based nanofiltration membranes through electrostatic self‐assembly for dye purification

Preparation of stable and superior flux GO/LDH/PDA‐based nanofiltration membranes through electrostatic self‐assembly for dye purification

Microstructure and corrosion behaviors of AZ31 alloy with an amorphous-crystallin nano-composite film

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