Porous anodic oxide film with self-healing ability for corrosion protection of aluminum

Yabuki, Akihiro; Yuki, Nagayama; Fathona, Indra Wahyudhin

doi:10.1016/j.electacta.2018.11.119

Cited by 26 publications

(6 citation statements)

References 42 publications

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“…On the other hand, the MLD films can also be used as a carbon-containing template for the formation of a conformal nanoporous oxide. The high (reactive) surface area found in porous thin films makes them a versatile class of materials for a wide range of applications, including filtration, − catalysis, − sensing applications, , gas separators, , battery electrodes, (super)capacitors, − medical applications, − and protective coatings. − Porous thin films can be deposited in a variety of ways, including interfacial polymerisation, anodic polymerization, hydrothermal or solvothermal reduction, (electro)chemical reduction, , sol–gel deposition, sonochemical etching, reactive magnetron sputtering, high-pressure thermal evaporation, polymeric micelle-assembly, and anodic oxidation . However, when uniformity and thickness control on the sub-nanometer scale and conformality on complex 3D structures are requirements for the envisioned application, these depositions methods often come short.…”

Section: Introductionmentioning

confidence: 99%

Molecular Layer Deposition of “Magnesicone”, a Magnesium-based Hybrid Material

et al. 2020

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Molecular layer deposition (MLD) offers the deposition of ultra-thin and conformal organic or hybrid films which have a wide range of applications. However, some critical potential applications require a very specific set of properties. For application as desiccant layers in water barrier films for example, the films need to exhibit water uptake, swelling and be overcoatable. For application as a backbone for a solid composite electrolyte for lithium ions on the other hand, the films need to be stable against lithium, and need to be transformable from a hybrid MLD film to a porous metal oxide film. Magnesium-based MLD films, called "magnesicone", are promising on both these 1 Page 1 of 51 ACS Paragon Plus Environment Chemistry of Materials aspects and thus an MLD process is developed using Mg(MeCp) 2 as metal source and ethylene glycol (EG) or glycerol (GL) as organic reactants. Saturated growth could be achieved at 2Å/cycle to 3Å/cycle in a wide temperature window from 100 • C to 250 • C. The resulting magnesicone films react with ambient air and exhibit water uptake, which is in the case of the GL-based films associated with swelling (up to 10%) and in the case of EG-based magnesicone with Mg(CO) 3 formation, and are overcoatable with ALD of Al 2 O 3 . Furthermore, by carefully tuning the annealing rate, the EG-grown films can be made porous at 350 • C. Hence, these functional tests demonstrate the potential of magnesicone films as reactive barrier layers and as the porous backbone of lithium ion composite solid electrolytes, making it a promising material for future applications.

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Section: Introductionmentioning

confidence: 99%

Molecular Layer Deposition of “Magnesicone”, a Magnesium-based Hybrid Material

et al. 2020

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“…Unfortunately, many AAs are susceptible to chloride ion attack, largely limiting their marine applications (Tseng et al , 2012; Sekularac and Milosev, 2018). Therefore, it is necessary to greatly improve the corrosion resistance of AAs against ion attacking, and surface treatment methods have been widely implemented (Kosari et al , 2020; Zhang et al , 2017; Padash et al , 2020; Yabuki et al , 2019), such as anodizing, plating, conversion coating, polymer coating and micro-arc oxidation (MAO) coating. Particularly, MAO coating is of great interest due to its high electric insulation resistance and good adhesion (Ji et al , 2017; Cai et al , 2020; Zong et al , 2019).…”

Section: Introductionmentioning

confidence: 99%

Analysis on corrosion of aluminum-based micro-arc oxidation coating

Yao

Feng

et al. 2021

ACMM

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Purpose Aluminum alloy is susceptible to chloride ion attack in sea water, resulting in pitting damage and hence serious security risks for the related applications. To improve the corrosion resistance of Al alloy, micro-arc oxidation (MAO) technology has been developed to produce a protective dense oxide layer on top of Al alloy. However, the mechanism of MAO-induced corrosion resistance is still not fully understood, particularly on local corrosion issue. This paper aims to focus on comprehensively studying the corrosion-resistance mechanism by a series of technologies. Design/methodology/approach The corrosion behavior of samples was studied by open circuit potential (OCP), potentiodynamic polarization (PDP), electrode impedance spectroscopy (EIS) and localized electrode impedance spectroscopy (LEIS) tests in NaCl solution. Findings The MAO-coated Al alloy shows a more positive corrosion potential and a higher corrosion current density compared to the untreated counterpart, indicating a significantly enhanced corrosion-resistance. The study of surface morphology and structure also suggest significantly enhanced corrosion-resistance due to the MAO treatment. Originality/value Based on the results, a new corrosion model was proposed to describe the influence of MAO treatment on the corrosion process and corrosion mechanism of Al alloy, providing insights on the design of the corrosion-resistance coating for metallic alloys in marine applications.

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“…The structural features like the pore length, diameter, and density (Balde et al 2015;Berger et al 2016a;Sharma and Islam 2016;Chung et al 2017;Laghrissi and Es-Souni 2019) can be controlled via a proper choice of the anodization conditions and electrolyte, and are transferred to the nanostructures, because the pores are the molds in which the nanostructures are grown. More applications of AAO include photonic crystals (Wang et al 2007), the structural stabilization of polymeric films (Szuwarzyński et al 2013), and corrosion protection (Wojciechowski et al 2016;Yabuki et al 2019). Recently, AAO films on glass substrate were shown to be used as structural stabilization scaffolds for anti-biofouling polymers, yielding transparent, scratch-resistant films which resist protein and cell adhesion; in particular, the polymer thin films were shown to not only cover the surface but also adhere to the pore walls thus allowing self-healing of the anti-fouling surface (Wassel et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Nanomechanical characterization and modeling of anodized porous aluminum oxide thin films with photografted anti-biofouling polymer brushes on their pore walls

et al. 2020

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Nanocomposites are known for their unique properties with many potential applications. In the present work, porous anodic aluminum oxide (AAO) thin films were processed on glass substrates and subsequently photo-grafted with a zwitterionic anti-biofouling polymer. This allows to fabricate scratch-resistant, transparent anti-biofouling films. The microstructure and how it is affected by nanomechanical testing are investigated by scanning electron microscopy and atomic force microscopy. It is shown that the polymer forms a thin layer on the pore walls and in deionized water, the pore diameter changes due to swelling of the polymer. The nanomechanical and scratch resistance properties are studied using a nanoindenter testing system. The experimental results are validated via numerical calculations. The values of the elastic modulus and hardness are shown to be in good agreement with the numerical ones, and under dry conditions, higher values were obtained in comparison to wet films. There is also a large agreement between modeling and microscopic deformation behavior of the films. Finally, the critical loads in dry and wet conditions for the non-coated AAO samples are approximately the same, while for the coated samples, the critical load is reached rapidly in wet condition in comparison to the dry one.

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Porous anodic oxide film with self-healing ability for corrosion protection of aluminum

Cited by 26 publications

References 42 publications

Molecular Layer Deposition of “Magnesicone”, a Magnesium-based Hybrid Material

Molecular Layer Deposition of “Magnesicone”, a Magnesium-based Hybrid Material

Analysis on corrosion of aluminum-based micro-arc oxidation coating

Nanomechanical characterization and modeling of anodized porous aluminum oxide thin films with photografted anti-biofouling polymer brushes on their pore walls

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