Defects Mediated Corrosion in Graphene Coating Layer

Lei, Jincheng; Hu, Yijun; Liu, Zishun; Cheng, Guanjun; Zhao, Kejie

doi:10.1021/acsami.7b01539

Cited by 53 publications

(33 citation statements)

References 43 publications

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“…Thirdly, because of special ake structure, graphene can increase the tortuous diffusion pathways avoiding corrosion mediums directly accessing the substrate surface, leading a good anti-corrosion property. 67 When graphene highly dispersed in LT aqueous solution in virtue of van der Waals forces, the good anti-corrosion properties of graphene can be fully used.…”

Section: Electrochemical Analysis Of the Rl/ltg And Rl Lmsmentioning

confidence: 99%

Bio-inspired electrochemical corrosion coatings derived from graphene/natural lacquer composites

et al. 2017

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Protective corrosion coatings are preferably composed of available, environmentally friendly, and low-volatility organic compounds. Herein, new excellent corrosion graphene/raw lacquer composite coatings were formed, in which waterborne graphene was modified by taking lignin tripolymer (LT) as an aqueous stabilizer and subsequently adding to raw lacquer (RL). Graphene/lacquer composite coatings were achieved by an ecofriendly fabrication process. The structure and thermostability of the lignin derivative were studied by Fourier transform infrared spectroscopy (FT-IR) and thermogravimetry (TG), respectively, while the composition of the LT was characterized by Raman spectrometry. And the experimental result revealed that LT was an effective graphene dispersant (LTG) up to 60 d without any precipitation. Besides, the SEM of the graphene/lacquer coatings revealed that the excellent protection properties were highly attributable to the formation of a very rough surface, because of the highly dispersed nature of the graphene nanoparticles.Also, the corrosion behavior of the composite coatings on a metal substrate were studied by polarization curve analysis and electrochemical impedance spectroscopy (EIS). According to the electrochemical corrosion tests, the lacquer composite coating with 5 wt% LTG dispersion (RL/LTG-5, containing 0.3 wt% graphene) possessed excellent corrosion resistance, making it suitable for protecting bare metal substrates.

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Section: Electrochemical Analysis Of the Rl/ltg And Rl Lmsmentioning

confidence: 99%

Bio-inspired electrochemical corrosion coatings derived from graphene/natural lacquer composites

et al. 2017

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“…Above studies show the advantage of graphene with high aspect-ratio as physical barriers in coatings; however, it has also been reported that graphene may have an enormous negative impact on corrosion protection in defects of coatings. [199] Zhou et al reported that graphene exhibited the corrosion enhancement effect, which was attributed to existence of coating defects and graphene with high electrical conductivity, favoring electrochemical corrosion of copper. [200] In addition, Schriver et al revealed that graphene can only offer short-term corrosion protection; it even promoted more extensive wet corrosion over a certain period of time.…”

Section: Graphene and Its Derivativesmentioning

confidence: 99%

Polymer Nanocomposite‐based Coatings for Corrosion Protection

Peng

Xiao²,

Rong

et al. 2020

Chemistry An Asian Journal

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Corrosion of metals induces enormous loss of material performance and increase of cost, which has been a common and intractable issue that needs to be addressed urgently. Coating technology has been acknowledged to be the most economic and efficient approach to retard the metal corrosion. For several decades, polymers have been recognized as an effective anticorrosion coating material in both industries and scientific communities, as they demonstrate good barrier properties, ease of altering properties and massive production. Nanomaterials show distinctively different physical and chemical properties compared with their bulk counterparts, which have been considered as highly promising functional materials in various applications, impacting virtually all the fields of science and technologies. Recently, the introduction of nanomaterials with various properties into polymer matrix to form a polymer nanocomposite has been devoted to improve anticorrosive ability of polymer coatings. In this review article, we highlight the recent advances and synopsis of these high-performance polymer nanocomposites as anticorrosive coating materials. We expect that this work could be helpful for the researchers who are interested in the development of functional nanomaterials and advanced corrosion protection technology.

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“…Due to the randomly distributed graphene grains in CVD process, conventional graphene film is a polycrystalline structure composed of various grain boundaries. [66][67][68][69][70][71][72] Besides of this, CVD graphene inevitably possesses many other structural defects like vacancy, disorder and dislocation defects. [73] These structural defects would be firstly penetrated by oxidative species and make it possible to diffuse at the interface between graphene and the growth substrates, favoring substantial corrosion in a long term.…”

Section: Oxidative Originators: Graphene Structural Defectsmentioning

confidence: 99%

Oxidative Originators of Graphene Barrier Coating Grown on Surfaces

2020

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Graphene coating has been proposed to be a promising oxidation barrier for metals because of its chemical inertia and physical impermeability. Nevertheless, chemical vapor deposition (CVD)‐grown graphene on metal surfaces results in many structural defects and growth imperfections, which would serve as oxidative originators and favor a substantial galvanic corrosion at such interfaces in the long term. On this basis, oxidative originators including graphene structural defects and CVD growth imperfections of graphene on copper have been reviewed from the perspective of CVD growth of graphene. The associated oxidation processes and long‐term corrosion mechanisms as a protective coating for Cu are discussed. Finally, the remaining challenges and potential improvement of graphene and graphene‐like materials grown on surfaces as a barrier coating are outlooked. We aim to providing comprehensive knowledge about the relationship between various graphene defects/growth imperfections and the oxidation/corrosion mechanisms as a protective coating, seeking a roadmap to promote the development of cheap, powerful and effective barrier technologies based on such ultrathin two‐dimensional materials.

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Defects Mediated Corrosion in Graphene Coating Layer

Cited by 53 publications

References 43 publications

Bio-inspired electrochemical corrosion coatings derived from graphene/natural lacquer composites

Bio-inspired electrochemical corrosion coatings derived from graphene/natural lacquer composites

Polymer Nanocomposite‐based Coatings for Corrosion Protection

Oxidative Originators of Graphene Barrier Coating Grown on Surfaces

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