MgAl-V2O7 4- LDHs/(PEI/MXene)10 composite film for magnesium alloy corrosion protection

Wu, Yulong; Wu, Liang; Zheludkevich, Mikhail L.; Chen, Yanning; Serdechnova, Maria; Yao, Wenhui; Blawert, Carsten; Atrens, Andrej; Pan, Fusheng

doi:10.1016/j.jmst.2021.03.011

Cited by 43 publications

(8 citation statements)

References 51 publications

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“…Good corrosion resistance has been observed in earlier studies of layer-by-layer (LBL) self-assembly within polyelectrolyte layers via electrostatic or hydrogen bonding interactions. , For instance, poly(vinylpyrrolidone) (PVP)/poly(acrylic acid) (PAA) multilayer structure coating on the magnesium alloy surface obtained by the LBL method shows a dense and uniform physical barrier layer . By covering polyethylenimine (PEI)/MXene on the surface of the inhibitors-loaded LDH phase, the physical barrier of the organic layer and the self-healing capability of the LDH phase present evident advantages, showing obviously enhanced corrosion protection for magnesium alloys …”

Section: Introductionmentioning

confidence: 93%

“…28 By covering polyethylenimine (PEI)/MXene on the surface of the inhibitors-loaded LDH phase, the physical barrier of the organic layer and the selfhealing capability of the LDH phase present evident advantages, showing obviously enhanced corrosion protection for magnesium alloys. 29 Despite the progress in exploring different coating structures, effectively sealing the microscale and nanoscale pores remains elusive. This paper demonstrates an effective strategy to construct a highly corrosion-resistant self-healing coating by inhibitor-sandwiched polyelectrolyte pore-sealing.…”

Section: Introductionmentioning

confidence: 99%

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Inhibitor-Sandwiched Polyelectrolyte Film for Micro/Nanopore Sealing to Enable Corrosion-Resistant Self-Healing Capability

Xie,

Zhang,

et al. 2024

ACS Appl. Polym. Mater.

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Layered double hydroxide (LDH) layers have emerged as a promising class of materials in preparing functional coatings due to their specific anion exchangeability. However, most LDH-based films exhibit micro-and nanoscale pores that are not conducive enough to block corrosive media penetration. This report demonstrates a corrosion-resistant LDH-based composite coating with an 8-hydroxyquinoline (8HQ)-sandwiched polyelectrolyte outer film. This polyelectrolyte film is flat and dense, enabling an effective pore-sealing of the LDH layer on the magnesium alloy and preventing the dissolution and diffusion of inhibitor into the bulk solution. This strategy is shown to enhance the corrosion protection performance significantly. Electrochemical measurements, including the scanning vibrating electrode technique (SVET), confirm that the as-prepared composite coating exhibits very high charge transfer resistance (∼90 MΩ•cm 2 ), extremely low corrosion current density (<1.0 nA cm −2 ), and superior self-healing capability. The high-performance corrosion protection is attributed to a combination of the ion-exchange capability of the LDH phase, corrosion inhibition of the 8HQ inhibitor, intrinsic properties and sealing effect of the polyelectrolyte, and decreased hydrophilicity. These findings provide insight into highly efficient sealing for porous layers on metal surfaces to achieve coating with long-term corrosion protection and self-healing capability.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Inhibitor-Sandwiched Polyelectrolyte Film for Micro/Nanopore Sealing to Enable Corrosion-Resistant Self-Healing Capability

Xie,

Zhang,

et al. 2024

ACS Appl. Polym. Mater.

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“…Different inorganic inhibitors such as molybdate [ 62 , 219 ], vanadate [ 219 , 220 , 221 , 222 ], phosphate [ 219 ], and nitrate [ 220 ] have been successfully intercalated into LDH conversion coatings on Mg alloys. The corrosion inhibition of CO 3 2− on Mg alloys has been reviewed in Section 2.5 , can also be intercalated into LDH structure.…”

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

et al. 2022

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Owing to the unique active corrosion protection characteristic of hexavalent chromium-based systems, they have been projected to be highly effective solutions against the corrosion of many engineering metals. However, hexavalent chromium, rendered a highly toxic and carcinogenic substance, is being phased out of industrial applications. Thus, over the past few years, extensive and concerted efforts have been made to develop environmentally friendly alternative technologies with comparable or better corrosion protection performance to that of hexavalent chromium-based technologies. The introduction of corrosion inhibitors to a coating system on magnesium surface is a cost-effective approach not only for improving the overall corrosion protection performance, but also for imparting active inhibition during the service life of the magnesium part. Therefore, in an attempt to resemble the unique active corrosion protection characteristic of the hexavalent chromium-based systems, the incorporation of inhibitors to barrier coatings on magnesium alloys has been extensively investigated. In Part III of the Review, several types of corrosion inhibitors for magnesium and its alloys are reviewed. A discussion of the state-of-the-art inhibitor systems, such as iron-binding inhibitors and inhibitor mixtures, is presented, and perspective directions of research are outlined, including in silico or computational screening of corrosion inhibitors. Finally, the combination of corrosion inhibitors with other corrosion protection strategies is reviewed. Several reported highly protective coatings with active inhibition capabilities stemming from the on-demand activation of incorporated inhibitors can be considered a promising replacement for hexavalent chromium-based technologies, as long as their deployment is adequately addressed.

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“…To improve their corrosion protection ability, all kinds of surface modification techniques have been adopted, among which covering anti-corrosion coatings on the surface of Mg alloys is considered to be an effective strategy [6][7][8][9][10][11][12][13][14][15][16]. In recent years, layered double hydroxides (LDHs) as an important inorganic nanocontainer material have become a research hotspot in the field of anticorrosion coatings, owing to their good structural tunability, anion exchangeability and thermostability [17][18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Enhanced corrosion protection of AZ31B magnesium alloy by MgAl-LDHs composite coatings double-doped with imidazolium ionic liquid and sodium dodecylbenzenesulphonate

Liu

Huangfu

Gao

et al. 2023

Corrosion Engineering, Science and Technology

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Herein, we prepare two types of MgAl-LDHs coatings single-doped by imidazolium ionic liquid 1decyl-3-methylimidazolium bromide ([Demim]Br) or sodium dodecylbenzenesulphonate (SDBS) and double-doped by [Demim]Br and SDBS on AZ31B Mg alloy by using an in-situ hydrothermal treatment. Their surface morphology and corrosion resistance immersed in 3.5 wt-% NaCl solution are explored. Our results suggest that the double doping of [Demim]Br and SDBS will change the surface morphology of the coating and a uniform and dense film is observed in the double-doped MgAl-LDHs, which is denser than those of the two single-doped MgAl-LDHs coatings, thus providing a superior corrosion resistance. Such an improvement can be ascribed to the synergetic inhibition effect of [Demim]Br and SDBS against the corrosion of the Mg alloy substrate. More importantly, the charge transfer resistance of the sample coated with the double-doped MgAl-LDHs is still high after 3 d of immersion, benefiting from the excellent self-healing effect.

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MgAl-V2O7 4- LDHs/(PEI/MXene)10 composite film for magnesium alloy corrosion protection

Cited by 43 publications

References 51 publications

Inhibitor-Sandwiched Polyelectrolyte Film for Micro/Nanopore Sealing to Enable Corrosion-Resistant Self-Healing Capability

Inhibitor-Sandwiched Polyelectrolyte Film for Micro/Nanopore Sealing to Enable Corrosion-Resistant Self-Healing Capability

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

Enhanced corrosion protection of AZ31B magnesium alloy by MgAl-LDHs composite coatings double-doped with imidazolium ionic liquid and sodium dodecylbenzenesulphonate

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