Ni-graphene oxide composite coatings: Optimum graphene oxide for enhanced corrosion resistance

Jyotheender, K. Sai; Srivastava, Chandan

doi:10.1016/j.compositesb.2019.107145

Cited by 95 publications

(29 citation statements)

References 69 publications

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“…Because of their polymeric nature, these materials are associated with huge intermolecular (Van der Waals) force of attraction they readily undergo agglomeration inside the polymer matrix that adversely affect their uniform distribution and ultimately their corrosion inhibition performance. [68,142,143] More so, they also undergo stacking with the polymer matrix in which they are used as nanofillers. Another shortcoming of using these materials is that their use as aqueous phase corrosion inhibitors is limited because of their limited solubility in the polar electrolytes.…”

Section: Discussionmentioning

confidence: 99%

“…Agglomeration adversely affects solubility of nanomaterials in the aqueous electrolytes. [67,68] Nevertheless, nanomaterials are used as anticorrosive coating along with polymer matrixes such as nylon, polyimide, polystyrene, epoxy resin, poly(methyl methacrylate) etc. in the form of nanocomposites.…”

Section: Role Of Nanotechnology As Next Generation Of Corrosion Inhibitor Systems-role Of Nanotechnology: Theatrical Aspectsmentioning

confidence: 99%

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Recent advancements in corrosion inhibitor systems through carbon allotropes: Past, present, and future

et al. 2021

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Nano-sized carbon allotropes, particularly graphene (G), graphene oxide (GO), single and multi-walled carbon nanotubes (CNTs, SWCNTs, and MWCNTs) and their chemically modified derivatives are widely used in anticorrosive coating formulations. Generally, carbon allotropes acquire nanofiller property and high hydrophobicity which make them ideal anticorrosive materials. Along with various advantages, using carbon allotropes as anticorrosive materials are connected with some specific challenges including un-controlled dispersion in polymer matrixes. Chemical functionalization using covalent and non-covalent methods are widely used to enhance their dispersibility. Magnetic stirring, ultrasonic mixing, ball milling and shear emulsification are also widely used to enhance their dispersibility. Present review article describes the covalent and non-covalent functionalization of G, GO, and CNTs and their application as corrosion inhibitors in various coating formulations and aqueous phase. Chemically modified GO shows remarkable solubility/dispersibility in the aqueous electrolytes. Advantages and challenges using these materials as corrosion inhibitors have also been discussed hereincorrosion inhibitors, nanocomposites, nanotechnology, polymer matrixes and green corrosion inhibitors 1This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Discussionmentioning

confidence: 99%

Section: Role Of Nanotechnology As Next Generation Of Corrosion Inhibitor Systems-role Of Nanotechnology: Theatrical Aspectsmentioning

confidence: 99%

Recent advancements in corrosion inhibitor systems through carbon allotropes: Past, present, and future

et al. 2021

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“…In contrast, GO and RGO have various hydrophilic functional groups such as —OH, epoxy, and —COOH, resulting in a proper dispersion in a solvent. [ 11 ] The improvement of mechanical and corrosion properties of Ni‐based composite coating due to the addition of GO/RGO has been reported by many researchers [2c,7,9a,9b,10,12] . Jyotheender et al studied the effect of amount of GO in the electrodeposition bath and found that a 0.625 g L −1 of GO corresponded to the optimum corrosion resistance of Ni–GO composite coatings.…”

Section: Introductionmentioning

confidence: 97%

“…[2c,7,9a,9b,10,12] Jyotheender et al studied the effect of amount of GO in the electrodeposition bath and found that a 0.625 g L À1 of GO corresponded to the optimum corrosion resistance of Ni-GO composite coatings. [12] Ren et al successfully electrodeposited Ni-RGO composites resulting in an elastic modulus of 240 GPa and a hardness of 4.6 GPa which were 1.7 and 1.2 times higher than those of pure Ni deposited at the same condition. [9b] The aim of this investigation is to electrodeposit an environmentally friendly Ni-RGO composite coating from a surfactantfree, neutral (pH %7) bath to impart significant improvement in the hardness and corrosion resistance of the coatings.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposited Nickel Coating Reinforced with Chlorophyll‐Reduced Graphene Oxide

et al. 2021

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Nickel composite coating reinforced with reduced graphene oxide is fabricated by pulse electrodeposition method from a surfactant‐free bath at different current densities. The reduction of graphene oxide is done by an ecofriendly method which uses chlorophyll (CHL) as the reducing agent. The CHL also acts as a stabilizer because of its amphiphilicity. Auger electron spectroscopy is used to study the surface morphology and characteristics of the deposited coatings. Nanoindentation is used to study the mechanical properties. Electrochemical techniques such as potentiodynamic polarization and electrochemical impedance spectroscopy are used to study the corrosion behavior in 3.5 wt% NaCl solution. The coatings are found to exhibit superior hardness, Young's modulus, and corrosion resistance when compared with the pure Ni coating. Hardness and corrosion resistance are found to improve almost tenfold at optimized condition. Scanning electron microscopy of the corroded surface of the coatings provides an insight into the corrosion process.

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“…Several recent studies have shown that addition of carbonaceous materials, such as graphene, graphene oxide and carbon nanotubes, leads to enhancement of the corrosion resistance behavior of the matrix material. [24][25][26][27] The observed enhancement of the corrosion resistance has been attributed to the impermeability to the passage of the corrosive media for graphene and graphene oxide and hydrophobicity for CNTs [28,29] and also to the microstructural alterations of the matrix phase observed in all cases. These microstructural alterations include changes in grain sizes, changes in the growth pattern/texture (surface orientation), compositional segregations at heterophase interfaces and evolution of the micro-texture with respect to the relative change in the fraction of low-and high-angle grain boundaries.…”

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confidence: 99%

Evolution of Phase Constitution, Morphology and Corrosion Behavior of ZnCo Coating Containing Graphene Oxide

Arora

Srivastava

2020

Metall Mater Trans A

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The morphology, phase constitution and corrosion behavior of a pristine ZnCo coating (obtained from an acidic bath) and ZnCo composite coatings containing different amounts of graphene oxide were studied. To achieve this, electrochemical impedance spectroscopy, potentiodynamic polarization studies, scanning electron microscopy, X-ray diffraction, atomic force microscopy, contact angle measurement and weight loss measurements were conducted. It was observed that the morphology, phase constitution and corrosion resistance of the coatings were highly sensitive to the amount of graphene oxide contained in the coatings. For lower graphene oxide amounts, a compact and smooth morphology was observed, whereas higher graphene oxide content produced a non-uniform morphology with cracks on the coating surface essentially due to the deposition of agglomerated graphene oxide in the coating matrix. All the coatings contained a mixture of Zn phase and Zn 10.63 Co 2.34 intermetallic phase. The volume fraction of the nobler intermetallic phase increased with an increase in the graphene oxide amount. The corrosion rate of the coatings decreased with the initial addition of graphene oxide to reach a minimum after which it increased with continued addition of graphene oxide. The initial reduction in the corrosion rate was attributed to the enhancement in the coating compactness and smoothness with the addition of graphene oxide, impermeability of the graphene oxide and enhancement of the relative volume fraction of the intermetallic phase. The enhancement of the corrosion rate after the optimum, which gave the lowest corrosion rate, was due to the increase in the morphologic roughness, cracks and surface defects in the coatings primarily due to non-uniform deposition of agglomerated graphene oxide in the coating matrix. Surface defects did not allow the formation of a continuous passive protection layer.

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Ni-graphene oxide composite coatings: Optimum graphene oxide for enhanced corrosion resistance

Cited by 95 publications

References 69 publications

Recent advancements in corrosion inhibitor systems through carbon allotropes: Past, present, and future

Recent advancements in corrosion inhibitor systems through carbon allotropes: Past, present, and future

Electrodeposited Nickel Coating Reinforced with Chlorophyll‐Reduced Graphene Oxide

Evolution of Phase Constitution, Morphology and Corrosion Behavior of ZnCo Coating Containing Graphene Oxide

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