Corrosion protection of AA2024-T3 by sol-gel film modified with graphene oxide

Xue, Bing; Yu, Mei; Liu, Jianjun; Liu, Jianhua; Li, Songmei; Xiong, Liangliang

doi:10.1016/j.jallcom.2017.05.091

Cited by 54 publications

(19 citation statements)

References 49 publications

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“…In our study, the Nyquist plots of the coated NiTi showed larger diameter than the bare NiTi alloy which represented higher corrosion resistance and lower corrosion rate. This is similar to the various other coatings, such as graphene/polyvinyl alcohol nanocomposite coating 24 , sol-gel film modified with GO 32 , and polyaniline/graphene composites 33 . The results of the electrochemical impedance spectroscopy (EIS) can be best fitted by the equivalent circuit model for both the bare NiTi alloy and coated substrates ( Fig.…”

supporting

confidence: 78%

“…It showed that GO-coatings and GO/Ag-coatings changed the processes of the cathodic O 2 reduction reaction. This change has explained by the previous study 32 . Firstly, the good barrier property from GO layers and the increased cross-linking density of the coatings reduced the active surface area available for the attack of the corrosive medium which retarded the O 2 reduction reaction.…”

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confidence: 74%

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Corrosion Resistance of Graphene oxide/Silver Coatings on Ni–Ti alloy and Expression of IL-6 and IL-8 in Human Oral Fibroblasts

Srimaneepong

Rokaya

Thunyakitpisal

et al. 2020

Sci Rep

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Graphene based materials (GBMs) have potentials for dental and medical applications. GBMs may cause changes in the levels of cytokine released in the body. this study aimed to study the corrosion resistance of graphene oxide (Go) and Go/silver (Go/Ag) nanocomposite coated nickel-titanium (niti) alloy by electrophoretic deposition and to access the viability of human pulp fibroblasts, and the interleukin (IL)-6 and IL-8 expression level. The bare and coated NiTi samples were characterized by scanning electron microscope (SeM), energy-dispersive X-ray spectroscopy (eDS), Raman spectroscopy, surface profilometry, and X-ray diffraction (XRD). The corrosion resistance of the bare NiTi and coated NiTi samples were investigated by potentiodynamic polarization and electrochemical impedance spectroscopy in 3.5% NaCl solution. The cell viability of human pulp fibroblasts was accessed by the treated culture medium of the bare NiTi and coated NiTi alloys containing 1% fetal bovine serum. IL-6 and IL-8 expression levels were studied by human enzyme-linked immunosorbent assay (ELISA). Data were analyzed using One-way ANOVA (α = 0.05). Both the GO-coated NiTi and GO/Ag-coated NiTi alloys showed better corrosion resistance, a lower rate of corrosion, and higher protection efficiency than the bare NiTi alloy. The coated NiTi alloys were biocompatible to human pulp fibroblasts and showed upregulation of IL-6 and IL-8 levels. Nickel-titanium (NiTi) alloy is widely used due to the special properties of superelasticity and shape memory. Common biomedical applications of NiTi alloys include vascular stents, staples, catheter guide wires, orthodontic wires, and endodontic instruments. However, NiTi alloy exhibits corrosion attack compared to stainless steel, cobalt-chrome, or β-titanium and it results in Ni and Ti ions release. It was found that a significant release of Ni and Ti ions from dental alloys in corrosive environment is noted although the amount of Ni ions release diminish with time 1. Another study found that Ni leaching occurred after placement of the NiTi orthodontic archwires, bands and brackets and was associated with an increase of the Ni ion concentration in the patient's saliva which lasted for 10 weeks and then decreased slowly 2. These ions can cause foreign body reactions, allergy, and adverse reactions in the human body, such as stomatitis, burning sensation, angular cheilitis, and loss of taste 3,4. Similarly, Ni along with Co and Cr remains the most common metals associated with surgical implant failure due to metal sensitization 5. Therefore, the surface modifications and/or coatings have an important role in surface improvement and reducing the corrosion and body reactions. Although various polymer coatings have been tried on NiTi alloy, there has always difficult in making a successful coatings 6,7. Graphene is a sheet of sp 2 carbon atoms that creates a 2-D hexagonal honeycomb structure 8. Graphene based materials (GBMs) have been used for fabricating various nanocomposite coatings to improve surface and me...

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confidence: 78%

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confidence: 74%

Corrosion Resistance of Graphene oxide/Silver Coatings on Ni–Ti alloy and Expression of IL-6 and IL-8 in Human Oral Fibroblasts

Srimaneepong

Rokaya

Thunyakitpisal

et al. 2020

Sci Rep

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“…Electrochemical measurements were used to estimate the electrochemical parameters associated with the corrosion process occurring on the substrate covered with different films during the immersion time [44]. It was generally recognized that a lower corrosion current density and higher corrosion potential corresponded to a better corrosion resistance.…”

Section: The Polarization Curves Testmentioning

confidence: 99%

Perfect Combination of LBL with Sol–Gel Film to Enhance the Anticorrosion Performance on Al Alloy under Simulated and Accelerated Corrosive Environment

et al. 2019

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Given their outstanding versatile properties, multilayered anticorrosion coatings have drawn great interest from researchers in the academic and engineering fields. However, the application of multilayered coatings is restricted by some limitations such as low interlayer compatibilities, the harsh preparation process, etc. This work introduced a composite film fabricated on a 2A12 aluminum alloy surface, including an anodic oxide film, a sol–gel film, and a layer-by-layer (LBL) self-assembling film from bottom to top. The microstructure and elemental characterization indicated that the finish of the coating with the LBL film resulted in a closely connected multilayered coating with a smoother surface. The anticorrosion performance was systematically evaluated in the simulated corrosive medium and neutral salt spray environment. The integrated coating with the LBL film presented an excellent anticorrosion ability with system impedance over 108 Ω·cm2 and a self-corrosion current density two orders of magnitude lower than that of the other coatings. After the acceleration test in a salt spray environment, the multilayered coatings could still show a good protective performance with almost no cracks and no penetration of chloride ions. It is believed that the as-constructed multilayered coating with high corrosive properties and a fine surface state will have promising applications in the field of anticorrosion engineering.

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“…The results showed that the SiO 2 -GO nano-hybrid coatings significantly reduced the cathodic delamination rate of the epoxy coating, improving the corrosion resistance. More recently, Bing Xue et al [12] reported the preparation of GO-based hybrid sol-gel coatings on aluminium alloys. In their study, 3-glycidoxypropyl-trimethoxysilane (GPTMS) and zirconium (IV) n-propoxide (TPOZ) were used as precursors and GO was synthesized by oxidizing and exfoliating graphite following a modified Hummers' method.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Sol–Gel Silica Coatings Containing Graphene Nanosheets for Improving the Corrosion Protection of AA2024-T3

et al. 2020

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In the present work, nanostructured graphene nanosheets were added to hybrid silica sols and deposited on aluminium alloy A2024-T3 to study the effect on the corrosion behaviour. Sols were prepared using tetraethyl-orthosilicate (TEOS), 3-glycidoxypropyl-trimethoxysilane (GPTMS) and a colloidal silica suspension (LUDOX) as silica precursors with adding chemically modified graphene nanosheets (GN-chem). The graphene nanosheets were modified through a straightforward and simple hydrothermal approach and then, dispersed into a silica sol (SiO2/GN-chem). ATR-FTIR was used to optimize the silica sol–gel synthesis and to confirm the cross-linking of the silica network. The corrosion behaviour of the SiO2/GN-chem coatings was also analysed by electrochemical measurement (potentiodynamic polarization) in 0.05 M NaCl solution. The results showed that the incorporation of modified graphene nanosheets into hybrid silica sol–gel coatings affected the corrosion properties of the substrates. An improvement in the corrosion resistance was observed likely due to the enhanced barrier property and hydrophobic behaviour obtained by incorporation of GN-chem and colloidal silica nanoparticles.

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Corrosion protection of AA2024-T3 by sol-gel film modified with graphene oxide

Cited by 54 publications

References 49 publications

Corrosion Resistance of Graphene oxide/Silver Coatings on Ni–Ti alloy and Expression of IL-6 and IL-8 in Human Oral Fibroblasts

Corrosion Resistance of Graphene oxide/Silver Coatings on Ni–Ti alloy and Expression of IL-6 and IL-8 in Human Oral Fibroblasts

Perfect Combination of LBL with Sol–Gel Film to Enhance the Anticorrosion Performance on Al Alloy under Simulated and Accelerated Corrosive Environment

Hybrid Sol–Gel Silica Coatings Containing Graphene Nanosheets for Improving the Corrosion Protection of AA2024-T3

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