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Zhang Z, Wang J, Serdechnova M, Kasneryk V, Zhang Z, Blawert C, Wang H, Zheludkevich ML, Chen F, Zhang Y. An Inhibitor-Loaded LDH- and MOF-Based Bilayer Hybrid System for Active Corrosion Protection of Aluminum Alloys. ACS APPLIED MATERIALS & INTERFACES 2024; 16:11944-11956. [PMID: 38404036 DOI: 10.1021/acsami.3c19432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
A novel inhibitor-loaded bilayer hybrid system based on the LDH inner layer and MOF outer layer is designed on an aluminum alloy 2A12 surface to improve corrosion performance. The hybrid film system covers the inherent cavities and intercrystalline defects of the LDH film using the affinity between the LDH and the MOF compounds. The results demonstrate that the LDH-inhI precursor film is entirely covered by new Zn-based MOF microrods. The LDH-inhI precursor film is partially dissolved and recrystallized in favor of MOF crystal growth to strengthen the binding adhesion between LDH and MOF films. The LDH-inhI/MOF-inhII bilayer film shows significantly enhanced corrosion resistance through the synergistic action of LDH and MOF nanocontainers doped with different corrosion inhibitors (vanadates, 2,5-furandicarboxylic acid, and benzotriazoles). Due to the multiple loadings of the MOF film and the sustained-release of the LDH film, this method provides an effective approach to developing new anticorrosion systems and enhancing both the barrier ability and active corrosion protection performance of LDH-based conversion treatments.
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Affiliation(s)
- Zhe Zhang
- College of New Materials and Chemical Engineering, Beijing Key Lab of Special Elastomeric Composite Materials, Beijing Institute of Petrochemical Technology, Beijing 102617, China
| | - Juping Wang
- College of New Materials and Chemical Engineering, Beijing Key Lab of Special Elastomeric Composite Materials, Beijing Institute of Petrochemical Technology, Beijing 102617, China
- Institute of Surface Science, Helmholtz-Zentrum Hereon, Geesthacht 21502, Germany
| | - Maria Serdechnova
- Institute of Surface Science, Helmholtz-Zentrum Hereon, Geesthacht 21502, Germany
| | - Valeryia Kasneryk
- Institute of Surface Science, Helmholtz-Zentrum Hereon, Geesthacht 21502, Germany
| | - Zheng Zhang
- College of New Materials and Chemical Engineering, Beijing Key Lab of Special Elastomeric Composite Materials, Beijing Institute of Petrochemical Technology, Beijing 102617, China
| | - Carsten Blawert
- Institute of Surface Science, Helmholtz-Zentrum Hereon, Geesthacht 21502, Germany
| | - Hao Wang
- College of New Materials and Chemical Engineering, Beijing Key Lab of Special Elastomeric Composite Materials, Beijing Institute of Petrochemical Technology, Beijing 102617, China
| | - Mikhail L Zheludkevich
- Institute of Surface Science, Helmholtz-Zentrum Hereon, Geesthacht 21502, Germany
- Faculty of Engineering, CAU Kiel University, Kiel 24143, Germany
| | - Fei Chen
- College of New Materials and Chemical Engineering, Beijing Key Lab of Special Elastomeric Composite Materials, Beijing Institute of Petrochemical Technology, Beijing 102617, China
| | - You Zhang
- College of New Materials and Chemical Engineering, Beijing Key Lab of Special Elastomeric Composite Materials, Beijing Institute of Petrochemical Technology, Beijing 102617, China
- Institute of Surface Science, Helmholtz-Zentrum Hereon, Geesthacht 21502, Germany
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Tedim J, Galvão TLP, Yasakau KA, Bastos A, Gomes JRB, Ferreira MGS. Layered double hydroxides for corrosion-related applications—Main developments from 20 years of research at CICECO. Front Chem 2022; 10:1048313. [DOI: 10.3389/fchem.2022.1048313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 10/25/2022] [Indexed: 11/19/2022] Open
Abstract
This work describes the main advances carried out in the field of corrosion protection using layered double hydroxides (LDH), both as additive/pigment-based systems in organic coatings and as conversion films/pre-treatments. In the context of the research topic “Celebrating 20 years of CICECO”, the main works reported herein are based on SECOP’s group (CICECO) main advances over the years. More specifically, this review describes structure and properties of LDH, delving into the corrosion field with description of pioneering works, use of LDH as additives to organic coatings, conversion layers, application in reinforced concrete and corrosion detection, and environmental impact of these materials. Moreover, the use of computational tools for the design of LDH materials and understanding of ion-exchange reactions is also presented. The review ends with a critical analysis of the field and future perspectives on the use of LDH for corrosion protection. From the work carried out LDH seem very tenable, versatile, and advantageous for corrosion protection applications, although several obstacles will have to be overcome before their use become commonplace.
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Li W, Wang T, Nan Y, Li SJ, Li WP. Fluorinated Siloxane Modified Layered Double Hydroxide Sealing Film to Enhance the Corrosion Resistance of Anodic Oxide Film of Fricition Stir Welding Joint of Aluminum Alloys. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8105. [PMID: 36431593 PMCID: PMC9698674 DOI: 10.3390/ma15228105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 10/28/2022] [Accepted: 10/31/2022] [Indexed: 06/16/2023]
Abstract
Aluminum alloys and their welding structures have been widely used in aviation, aerospace, automobiles, ships, and other industrial fields. The non-uniform nature of welding structures of aluminum alloys causes intractable corrosion problems. Anodizing and subsequent sealing processes are common and effective methods to improve the corrosion resistance of welding structures. However, traditional sealing processes like hot water sealing and potassium dichromate sealing are criticized due to energy consumption or toxicity. In this work, a layered double hydroxide (LDH) sealing process with subsequent fluorinated siloxane modification is proposed to improve the corrosion resistance of the anodic oxide film of friction stir welding joints of typical aluminum alloys. The obtained sealing film with typical lamelliform structures of LDH grows well at the defects of oxidation film and also smoothens the sample surface. The hydrophobicity of the film can separate the corrosive medium from the sample surface and further enhance corrosion resistance. As a result, the corrosion current of the welded sample in 3.5 wt.% NaCl solution plummets about 3~4 orders of magnitude compared to the initial state without anodizing, indicating superior corrosion resistance brought by this method.
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Affiliation(s)
- Wen Li
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
- AVIC Manufacturing Technology Institute, Beijing 100024, China
| | - Tao Wang
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Yang Nan
- AVIC Manufacturing Technology Institute, Beijing 100024, China
| | - Shao-Jie Li
- AVIC Manufacturing Technology Institute, Beijing 100024, China
| | - Wei-Ping Li
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
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Hong S, Wei Z, Wang K, Gao W, Wu Y, Lin J. The optimization of microbial influenced corrosion resistance of HVOF sprayed nanostructured WC-10Co-4Cr coatings by ultrasound-assisted sealing. ULTRASONICS SONOCHEMISTRY 2021; 72:105438. [PMID: 33388693 PMCID: PMC7803796 DOI: 10.1016/j.ultsonch.2020.105438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 11/05/2020] [Accepted: 12/17/2020] [Indexed: 05/25/2023]
Abstract
In this study, high-velocity oxygen-fuel (HVOF) sprayed nanostructured WC-10Co-4Cr coatings were subjected to seawater with sulfate-reducing bacteria (SRB) for different time. The effect of ultrasound-assisted sealing with aluminum phosphate on the microstructural features and microbial influenced corrosion (MIC) behavior was evaluated using scanning electron microscopy (SEM), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results showed that the ultrasound-assisted sealing promoted the infiltration of the sealant into as-sprayed coating, enhanced the resistance values of about one order of magnitude, and reduced the corrosion current density. During the whole immersion period, the MIC process of both unsealed and sealed coatings can be divided into two different stages, and the ultrasound-assisted sealing treatment significantly delayed the MIC process, suggesting that the ultrasound-assisted sealing with aluminum phosphate is an effective way for controlling the MIC of SRB on the WC-10Co-4Cr cermet coatings in marine environment.
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Affiliation(s)
- Sheng Hong
- College of Mechanics and Materials, Hohai University, 8 Focheng West Road, Nanjing 211100, PR China.
| | - Ziyu Wei
- College of Mechanics and Materials, Hohai University, 8 Focheng West Road, Nanjing 211100, PR China
| | - Kailin Wang
- College of Mechanics and Materials, Hohai University, 8 Focheng West Road, Nanjing 211100, PR China
| | - Wenwen Gao
- College of Mechanics and Materials, Hohai University, 8 Focheng West Road, Nanjing 211100, PR China
| | - Yuping Wu
- College of Mechanics and Materials, Hohai University, 8 Focheng West Road, Nanjing 211100, PR China
| | - Jinran Lin
- College of Engineering, Nanjing Agricultural University, 40 Dianjiangtai Road, Nanjing 210031, PR China; Jiangsu Jinxiang Transmission Equipment Co., Ltd., 1 Qinglonghu Road, Huaian 223001, PR China
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Kaseem M, Ramachandraiah K, Hossain S, Dikici B. A Review on LDH-Smart Functionalization of Anodic Films of Mg Alloys. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:536. [PMID: 33669848 PMCID: PMC7923239 DOI: 10.3390/nano11020536] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 02/11/2021] [Accepted: 02/17/2021] [Indexed: 12/05/2022]
Abstract
This review presents an overview of the recent developments in the synthesis of layered double hydroxide (LDH) on the anodized films of Mg alloys prepared by either conventional anodizing or plasma electrolytic oxidation (PEO) and the applications of the formed composite ceramics as smart chloride traps in corrosive environments. In this work, the main fabrication approaches including co-precipitation, in situ hydrothermal, and an anion exchange reaction are outlined. The unique structure of LDH nanocontainers enables them to intercalate several corrosion inhibitors and release them when required under the action of corrosion-relevant triggers. The influences of different variables, such as type of cations, the concentration of salts, pH, and temperature, immersion time during the formation of LDH/anodic film composites, on the electrochemical response are also highlighted. The correlation between the dissolution rate of PEO coating and the growth rate of the LDH film was discussed. The challenges and future development strategies of LDH/anodic films are also highlighted in terms of industrial applications of these materials.
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Affiliation(s)
- Mosab Kaseem
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Korea
| | - Karna Ramachandraiah
- Department of Food Science and Biotechnology, College of Life Science, Sejong University, Seoul 05006, Korea;
| | - Shakhawat Hossain
- Department of Industrial and Production Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh;
| | - Burak Dikici
- Department of Metallurgical and Materials Engineering, Ataturk University, Erzurum 25240, Turkey;
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Al Zoubi W, Yoon DK, Kim YG, Ko YG. Fabrication of organic-inorganic hybrid materials on metal surface for optimizing electrochemical performance. J Colloid Interface Sci 2020; 573:31-44. [PMID: 32268261 DOI: 10.1016/j.jcis.2020.03.117] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 03/27/2020] [Accepted: 03/29/2020] [Indexed: 01/16/2023]
Abstract
Surface chemistry is a significant field of research, especially for the preparation of organic-inorganic hybrid materials in which nearly every atom is anchored at the interface. Herein we report on the functional binding agents (FBAs), Mg(OH)2 or Co(OH)2-Mg(OH)2-Co(OH)(NO3), as efficient tools for functionalising surfaces, whereby the morphology and growth of the organic-inorganic coating can be varied by varying the interfacial composition to achieve improved functionality. To demonstrate the potential of this strategy, we combine plasma electrolytic oxidation (PEO) and a two-step dip chemical coating (DCC) technique to deliver multi-layered constructions of several chemical compositions comprising inorganic and organic components. A novel single layer of FBAs is fabricated on the rough inorganic coating through chemical treatment via DCC, transforming it into a binding site for primary clusters of 2-mercaptobenzimidazole (MBI) molecules. Thus, FBAs form coordination complexes with organic molecules, which grow on FBA surfaces. Finally, electrochemical measurements reveal that the self-assembly of organic-inorganic hybrid heterostructures appreciably suppresses metal oxidation and oxygen reduction, due to a synergistic effect arising from the combination of FBAs with organic and inorganic coatings.
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Affiliation(s)
- Wail Al Zoubi
- Materials Electrochemistry Laboratory, School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Dong Keun Yoon
- Materials Electrochemistry Laboratory, School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Yang Gon Kim
- Extreme Fabrication Technology Group, Korea Institute of Industrial Technology, Daegu 42994, Republic of Korea
| | - Young Gun Ko
- Materials Electrochemistry Laboratory, School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.
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Iuzviuk MH, Bouali AC, Serdechnova M, Yasakau KA, Wieland DCF, Dovzhenko G, Mikhailau A, Blawert C, Zobkalo IA, Ferreira MGS, Zheludkevich ML. In situ kinetics studies of Zn-Al LDH intercalation with corrosion related species. Phys Chem Chem Phys 2020; 22:17574-17586. [PMID: 32716424 DOI: 10.1039/d0cp01765e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Kinetic parameters for three anion exchange reactions - Zn-LDH-NO3→ Zn-LDH-Cl, Zn-LDH-NO3→ Zn-LDH-SO4 and Zn-LDH-NO3→ Zn-LDH-VOx- were obtained by in situ synchrotron study. The first and the second ones are two-stage reactions; the first stage is characterized by the two-dimensional diffusion-controlled reaction following deceleratory nucleation and the second stage is a one-dimensional diffusion-controlled reaction also with a decelerator nucleation effect. In the case of exchange NO3-→ Cl- host anions are completely released, while in the case of NO3-→ SO42- the reaction ends without complete release of nitrate anions. The exchange of Zn-LDH-NO3→ Zn-LDH-VOx is a one-stage reaction and goes much slower than the previous two cases. The latter is characterized by a one stage two-dimensional reaction with an instantaneous nucleation. As a result, at the end of this process there are two crystalline phases with different polyvanadate species, presumably V4O124- and V2O74-, nitrate anions were not completely released. The rate of replacing NO3- anions by guest ones can be represented as Cl- > SO42- > VOxy-.
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Affiliation(s)
- Mariia H Iuzviuk
- Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», Laboratory of Physics of Crystals, Leningradskaya Oblast, 1, mkr. Orlova Roshcha, 188300, Gatchina, Russia.
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8
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Layered Double Hydroxide Protective Films Developed on Aluminum and Aluminum Alloys: Synthetic Methods and Anti-Corrosion Mechanisms. COATINGS 2020. [DOI: 10.3390/coatings10040428] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This work reviews the characteristics of layered double hydroxides (LDHs) in the context of protective thin films to enhance the corrosion resistance properties of aluminum alloys. A discussion is made in detail about the LDH protection mechanism and the effect of synthesis approaches on LDH structural variations and the corresponding anti-corrosion behavior. LDHs anion-exchange behavior to host inorganic/organic anions makes them a potential material to investigate for anti-corrosion film. This unique advantage and the availability of a wide range of metal oxide-based layers, interlayer anions, and self-healing properties make LDH family an attractive choice for the development of compact LDHs based smart coating systems.
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9
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The Sealing Step in Aluminum Anodizing: A Focus on Sustainable Strategies for Enhancing Both Energy Efficiency and Corrosion Resistance. COATINGS 2020. [DOI: 10.3390/coatings10030226] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Increasing demands for environmental accountability and energy efficiency in industrial practice necessitates significant modification(s) of existing technologies and development of new ones to meet the stringent sustainability demands of the future. Generally, development of required new technologies and appropriate modifications of existing ones need to be premised on in-depth appreciation of existing technologies, their limitations, and desired ideal products or processes. In the light of these, published literature mostly in the past 30 years on the sealing process; the second highest energy consuming step in aluminum anodization and a step with significant environmental impacts has been critical reviewed in this systematic review. Emphasis have been placed on the need to reduce both the energy input in the anodization process and environmental implications. The implications of the nano-porous structure of the anodic oxide on mass transport and chemical reactivity of relevant species during the sealing process is highlighted with a focus on exploiting these peculiarities, in improving the quality of sealed products. In addition, perspective is provided on plausible approaches and important factors to be considered in developing sealing procedures that can minimize the energy input and environmental impact of the sealing step, and ensure a more sustainable aluminum anodization process/industry.
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Smalenskaite A, Kaba MM, Grigoraviciute-Puroniene I, Mikoliunaite L, Zarkov A, Ramanauskas R, Morkan IA, Kareiva A. Sol-Gel Synthesis and Characterization of Coatings of Mg-Al Layered Double Hydroxides. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E3738. [PMID: 31766177 PMCID: PMC6888420 DOI: 10.3390/ma12223738] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 11/11/2019] [Accepted: 11/11/2019] [Indexed: 02/06/2023]
Abstract
In this study, new synthetic approaches for the preparation of thin films of Mg-Al layered double hydroxides (LDHs) have been developed. The LDHs were fabricated by reconstruction of mixed-metal oxides (MMOs) in deionized water. The MMOs were obtained by calcination of the precursor gels. Thin films of sol-gel-derived Mg-Al LDHs were deposited on silicon and stainless-steel substrates using the dip-coating technique by a single dipping process, and the deposited film was dried before the new layer was added. Each layer in the preparation of the Mg-Al LDH multilayers was separately annealed at 70 °C or 300 °C in air. Fabricated Mg-Al LDH coatings were characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and atomic force microscopy (AFM). It was discovered that the diffraction lines of Mg3Al LDH thin films are sharper and more intensive in the sample obtained on the silicon substrate, confirming a higher crystallinity of synthesized Mg3Al LDH. However, in both cases the single-phase crystalline Mg-Al LDHs have formed. To enhance the sol-gel processing, the viscosity of the precursor gel was increased by adding polyvinyl alcohol (PVA) solution. The LDH coatings could be used to protect different substrates from corrosion, as catalyst supports, and as drug-delivery systems in medicine.
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Affiliation(s)
- A. Smalenskaite
- Department of Inorganic Chemistry, Faculty of Chemistry, Vilnius University, Vilnius LT-03225, Lithuania; (A.S.); (I.G.-P.); (L.M.); (A.Z.)
| | - M. M. Kaba
- Department of Chemistry, Institute of Natural Sciences, Bolu Abant Izzet Baysal University, 14030 Bolu, Turkey; (M.M.K.); (I.A.M.)
| | - I. Grigoraviciute-Puroniene
- Department of Inorganic Chemistry, Faculty of Chemistry, Vilnius University, Vilnius LT-03225, Lithuania; (A.S.); (I.G.-P.); (L.M.); (A.Z.)
| | - L. Mikoliunaite
- Department of Inorganic Chemistry, Faculty of Chemistry, Vilnius University, Vilnius LT-03225, Lithuania; (A.S.); (I.G.-P.); (L.M.); (A.Z.)
- Center for Physical Sciences and Technology, LT-10257 Vilnius, Lithuania;
| | - A. Zarkov
- Department of Inorganic Chemistry, Faculty of Chemistry, Vilnius University, Vilnius LT-03225, Lithuania; (A.S.); (I.G.-P.); (L.M.); (A.Z.)
| | - R. Ramanauskas
- Center for Physical Sciences and Technology, LT-10257 Vilnius, Lithuania;
| | - I. A. Morkan
- Department of Chemistry, Institute of Natural Sciences, Bolu Abant Izzet Baysal University, 14030 Bolu, Turkey; (M.M.K.); (I.A.M.)
| | - A. Kareiva
- Department of Inorganic Chemistry, Faculty of Chemistry, Vilnius University, Vilnius LT-03225, Lithuania; (A.S.); (I.G.-P.); (L.M.); (A.Z.)
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Abstract
This work investigates environmentally friendly alternatives to toxic and carcinogenic Cr (VI)-based surface treatments for aluminium alloys. It is focused on multifunctional thin or flash plasma electrolytic oxidation (PEO)-layered double hydroxides (LDH) coatings. Three PEO coatings developed under a current-controlled mode based on aluminate, silicate and phosphate were selected from 31 processes (with different combinations of electrolytes, electrical conditions and time) according to corrosive behavior and energy consumption. In situ Zn-Al LDH was optimized in terms of chemical composition and exposure time on the bulk material, then applied to the selected PEO coatings. The structure, morphology and composition of PEO coatings with and without Zn-Al-LDH were characterized using XRD, SEM and EDS. Thicker and more porous PEO coatings revealed higher amounts of LDH flakes on their surfaces. The corrosive behavior of the coatings was studied by electrochemical impedance spectroscopy (EIS). The corrosion resistance was enhanced considerably after the PEO coatings formation in comparison with bulk material. Corrosion resistance was not affected after the LDH treatment, which can be considered as a first step in achieving active protection systems by posterior incorporation of green corrosion inhibitors.
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12
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Layered Double Hydroxide Clusters as Precursors of Novel Multifunctional Layers: A Bottom-Up Approach. COATINGS 2019. [DOI: 10.3390/coatings9050328] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The specific microstructure of aluminum alloys is herein explored to grow spatially-resolved layered double hydroxide (SR-LDH) clusters on their surface. Upon chemical modification of LDHs via intercalation, adsorption and grafting with different functional molecules, novel surface-engineered surfaces were obtained. Crystal structure and phase composition were analyzed by X-ray diffraction (XRD) and surface morphology was observed by scanning electron microscopy (SEM). X-ray photoelectron spectroscopy (XPS) and glow discharge optical emission spectrometry (GDOES) were used to correlate structural changes upon ion-exchange and interfacial modifications with chemical composition and surface profiles of the SR-LDH films, respectively. The protection conferred by these films against localized corrosion was investigated at microscale using the scanning vibrating electrode technique (SVET). LDH-NO3 phase was obtained by direct growth onto AA2024 surface, as evidenced by (003) and (006) XRD diffraction reflections. After anion exchange of nitrate with 2-mercaptobenzothiazole (MBT) there was a decrease in the SR-LDH thickness inferred from GDOES profiles. The subsequent surface functionalization with HTMS was confirmed by the presence of Si signal in XPS and GDOES analyses, leading to an increase in the water contact angle (c.a 144° ± 3°). SVET measurements of the SR-LDH films revealed exceptional corrosion resistance, whereas the bioluminescent bacteria assay proved the anti-microbial character of the obtained films. Overall the results obtained show an effective corrosion protection of the SR-LDHs when compared to the bare substrate and the potential of these films for biofouling applications as new Cr-free pre-treatments.
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13
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Anticorrosive Formulation Based of the Epoxy Resin–Polyaminoamide Containing Zinc Phosphate Inhibitive Pigment Applied on Sulfo-Tartaric Anodized AA 7075-T6 in NaCl Medium. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s40735-019-0218-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Kaseem M, Ko YG. A novel composite system composed of zirconia and LDHs film grown on plasma electrolysis coating: Toward a stable smart coating. ULTRASONICS SONOCHEMISTRY 2018; 49:316-324. [PMID: 30150026 DOI: 10.1016/j.ultsonch.2018.08.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 08/15/2018] [Accepted: 08/21/2018] [Indexed: 06/08/2023]
Abstract
A novel composite system composed of zirconia and double hydroxide layers (LDHs) was successfully fabricated on the plasma electrolysis (PE) coating. For this aim, the molybdate-loaded LDHs film grown on the PE film of aluminum alloy was modified additionally by zirconia nanoparticles via a facile dip-coating method. The MoO42- anions which were obtained by anion exchange process from the precursor CeMgAl-LDH film, led to decrease the distance between the flakes of LDHs film where a flower-like structure was successfully developed. Moreover, the inclusion of zirconia helped to decrease the size of pores present in the LDHs films. Accordingly, a superior smart protective film was obtained due to the possible synergetic effects between the MoO42- and Ce3+ ions released from LDHs film as well as the high chemical stability of zirconia. The LDHs film modified by zirconia can be regarded as a stable smart coating, meaning that it has the ability to control the release of corrosion inhibitors and providing an excellent long-term electrochemical performance as well.
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Affiliation(s)
- Mosab Kaseem
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Young Gun Ko
- School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.
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15
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Shulha TN, Serdechnova M, Lamaka SV, Wieland DCF, Lapko KN, Zheludkevich ML. Chelating agent-assisted in situ LDH growth on the surface of magnesium alloy. Sci Rep 2018; 8:16409. [PMID: 30401953 PMCID: PMC6219525 DOI: 10.1038/s41598-018-34751-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 10/22/2018] [Indexed: 11/09/2022] Open
Abstract
In situ formation of layered double hydroxides (LDH) on metallic surfaces has recently been considered a promising approach for protective conversion surface treatments for Al and Mg alloys. In the case of Mg-based substrates, the formation of LDH on the metal surface is normally performed in autoclave at high temperature (between 130 and 170 °C) and elevated pressure conditions. This hampers the industrial application of MgAl LDH to magnesium substrates. In this paper, the growth of MgAl LDH conversion coating directly on magnesium alloy AZ91 at ambient conditions (25 °C) or elevated temperatures is reported in carbonate free electrolyte for the first time. The direct LDH synthesis on Mg alloys is enabled by the presence of organic chelating agents (NTA and EDTA), which control the amount of free and/or hydroxyl bound Mg2+ and Al3+ in the solution. The application of the chelating agents help overcoming the typical technological limitations of direct LDH synthesis on Mg alloys. The selection of chelators and the optimization of the LDH treatment process are supported by the analysis of the thermodynamic chemical equilibria.
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Affiliation(s)
- T N Shulha
- MagIC-Magnesium Innovation Center, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straβe 1, 21502, Geesthacht, Germany
- Faculty of Chemistry, Belarusian State University, Nezavisimosti Avenue 4, 220030, Minsk, Belarus
| | - M Serdechnova
- MagIC-Magnesium Innovation Center, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straβe 1, 21502, Geesthacht, Germany.
| | - S V Lamaka
- MagIC-Magnesium Innovation Center, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straβe 1, 21502, Geesthacht, Germany
| | - D C F Wieland
- MagIC-Magnesium Innovation Center, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straβe 1, 21502, Geesthacht, Germany
| | - K N Lapko
- Faculty of Chemistry, Belarusian State University, Nezavisimosti Avenue 4, 220030, Minsk, Belarus
| | - M L Zheludkevich
- MagIC-Magnesium Innovation Center, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straβe 1, 21502, Geesthacht, Germany
- Faculty of Engineering, University of Kiel, Kaiserstrasse 2, 24143, Kiel, Germany
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16
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Zhang G, Wu L, Tang A, Weng B, Atrens A, Ma S, Liu L, Pan F. Sealing of anodized magnesium alloy AZ31 with MgAl layered double hydroxides layers. RSC Adv 2018; 8:2248-2259. [PMID: 35541445 PMCID: PMC9077258 DOI: 10.1039/c7ra11683g] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 12/27/2017] [Indexed: 11/21/2022] Open
Abstract
In this work, anodized magnesium alloy AZ31 with and without boiling water sealing was pre-prepared, and then MgAl-layered double hydroxide (LDH) films were fabricated on it through hydrothermal chemical conversion of the pre-prepared anodic layer. The morphology, structure, and composition of the films were characterized by XRD, SEM, EDS, FT-IR, XPS and GDOES. It was found that the porosity of the films was reduced after in situ fabrication of the LDHs. The effects of boiling water sealing treatment on the anodized substrate were also discussed. Moreover, the polarization curve, EIS, and immersion tests showed that LDHs fabricated on the anodized substrate with boiling water sealing treatment exhibited a significant long period of protection for the substrate. In this work anodized magnesium alloy AZ31 with and without boiling water sealing was pre-prepared, and then MgAl-layered double hydroxide (LDH) films were fabricated on it through hydrothermal chemical conversion of the pre-prepared anodic layer.![]()
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Affiliation(s)
- Gen Zhang
- College of Materials Science and Engineering
- Chongqing University
- Chongqing 400044
- China
| | - Liang Wu
- College of Materials Science and Engineering
- Chongqing University
- Chongqing 400044
- China
- National Engineering Research Center for Magnesium Alloys
| | - Aitao Tang
- College of Materials Science and Engineering
- Chongqing University
- Chongqing 400044
- China
- National Engineering Research Center for Magnesium Alloys
| | - Bo Weng
- Chongqing Key Lab for Advanced Materials & Clean Energies of Technologies
- Institute for Clean Energy and Advanced Materials
- Southwest University
- Chongqing 400715
- China
| | - Andrej Atrens
- School of Mechanical and Mining Engineering
- The University of Queensland
- Brisbane
- Australia
| | - Shida Ma
- College of Materials Science and Engineering
- Chongqing University
- Chongqing 400044
- China
| | - Lei Liu
- College of Materials Science and Engineering
- Chongqing University
- Chongqing 400044
- China
| | - Fusheng Pan
- College of Materials Science and Engineering
- Chongqing University
- Chongqing 400044
- China
- National Engineering Research Center for Magnesium Alloys
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17
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18
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Mata D, Serdechnova M, Mohedano M, Mendis CL, Lamaka SV, Tedim J, Hack T, Nixon S, Zheludkevich ML. Hierarchically organized Li–Al-LDH nano-flakes: a low-temperature approach to seal porous anodic oxide on aluminum alloys. RSC Adv 2017. [DOI: 10.1039/c7ra05593e] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Li-LDH sealing is accounted for being highly competitive to standard hot-water sealing as referred to reduced treatment temperature and higher corrosion protection efficiency.
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Affiliation(s)
- D. Mata
- Smallmatek – Small Materials and Technologies
- 3810-075 Aveiro
- Portugal
| | - M. Serdechnova
- Institute of Materials Research
- Helmholtz-Zentrum Geesthacht
- 21502 Geesthacht
- Germany
| | - M. Mohedano
- Institute of Materials Research
- Helmholtz-Zentrum Geesthacht
- 21502 Geesthacht
- Germany
- Departamento de Ciência de Materiales
| | - C. L. Mendis
- Institute of Materials Research
- Helmholtz-Zentrum Geesthacht
- 21502 Geesthacht
- Germany
- Brunel – Centre for Advanced Solidification Technology
| | - S. V. Lamaka
- Institute of Materials Research
- Helmholtz-Zentrum Geesthacht
- 21502 Geesthacht
- Germany
| | - J. Tedim
- CICECO
- Dep. Materials and Ceramic Engineering
- University of Aveiro
- Aveiro
- Portugal
| | - T. Hack
- Airbus Group Innovations
- 81663 Munich
- Germany
| | - S. Nixon
- Airbus Group Innovations
- 81663 Munich
- Germany
| | - M. L. Zheludkevich
- Institute of Materials Research
- Helmholtz-Zentrum Geesthacht
- 21502 Geesthacht
- Germany
- Faculty of Engineering
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