Oxidative Originators of Graphene Barrier Coating Grown on Surfaces

Yuan, Aiheng; Guan, Ran; Luo, Birong

doi:10.1002/cnma.202000269

Cited by 9 publications

(3 citation statements)

References 117 publications

(147 reference statements)

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“…It has a promising development in the field of metal anticorrosion due to its good performance in impermeability to small molecules with large aspect ratio and excellent chemical stability. It was found that graphene coating with double or triple layers generated by chemical vapor sediment (CVD) can offer great inhibition against corrosion to copper substrate in air or in 0.1 mol L −1 NaCl solution [1][2][3][4][5][6][7][8][9]. On the contrary, the monolayer and multilayer graphene has more defects, of which the corrosion resistance is reduced.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of Q235 steel in graphene oxide aqueous dispersion

Li¹,

Kong²,

Zhang³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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Conductive metals can speed up the self-assembly and reduction process of graphene oxide (GO) in liquid media, but little available information about the effect of this process on the corrosion rate of metal substrates. The corrosion performance of Q235 steel in GO aqueous solution was studied by comparing the influence of different GO concentrations and immersion times on the corrosion rate of steel. The result found that a GO layer will be formed on the surface of steel when immersing in the GO aqueous dispersion, which has a shielding effect on the diffusion process of ions and electrons, and effectively inhibits the steel corrosion. However, this inhibition effect of GO layer will disappear with the self-reduction of GO, which increasing the defect density and conductivity of the sedimentary layer on steel thus the corrosion rate of steel will increase with the immersion time and the GO concentration in solution.

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Section: Introductionmentioning

confidence: 99%

Corrosion behavior of Q235 steel in graphene oxide aqueous dispersion

Li¹,

Kong²,

Zhang³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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“…Graphene is a typical two-dimensional (2D) material with a tight hexagonal structure and many kinds of outstanding properties such as high strength, excellent thermal conductivity, and superior impermeability to gases [1][2][3][4]. These properties make graphene an excellent corrosion barrier for metals, because it acts as a good physical barrier, being chemically inert, preventing metals from coming into contact with O 2 and H 2 O in the surroundings [5][6][7][8][9]. However, it has been revealed that the graphene coating provides corrosion protection for the metal only for a short period of time.…”

Section: Introductionmentioning

confidence: 99%

Chemical Vapor Deposition of N-Doped Graphene through Pre-Implantation of Nitrogen Ions for Long-Term Protection of Copper

et al. 2021

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Nitrogen-doped graphene (NG) was synthesized through the chemical vapor deposition (CVD) of graphene on Cu substrates, which were pre-implanted with N ions by the ion implantation method. The pre-implanted N ions in the Cu substrate could dope graphene by the substitution of C atoms during the CVD growth of graphene, forming NG. Based on this, NG’s long-term protection properties for Cu were evaluated by ambient exposure for a corrosion test. The results showed that NG can obviously reduce the natural oxidation of Cu in the long-term exposure compared with the case of pristine graphene (PG) coated on Cu. Moreover, with the increase in pre-implanted N dose, the formed NG’s long-term protection for Cu improved. This indicates that the modification of graphene by N doping is an effective way to improve the corrosion resistance of the PG coating owing to the reduction in its conductivity, which would inhibit galvanic corrosion by cutting off electron transport across the interface in their long-term protection. These findings provide insight into corrosion mechanisms of the graphene coating and correlate with its conductive nature based on heteroatoms doping, which is a potential route for improving the corrosion resistance of graphene as an effective barrier coating for metals.

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“…In principle, the dense hexagonal honeycomb structure of perfect graphene lattice would isolate the metals from any corrosive elements [8][9][10]. However, the structural defects and growth imperfections in graphene are inevitably created accompanying the CVD processes and facilitate the mass transport of corrosive species as a pathway [11]. Recently, many graphene defects such as grain boundaries, vacancies, wrinkles, and the incommensurate coupling of graphene-Cu system [12][13][14][15][16][17] have been revealed to cause oxidative damages correlated with a galvanic corrosion in the long term [18,19].…”

Section: Introductionmentioning

confidence: 99%

Selective area oxidation of copper derived from chemical vapor deposited graphene microstructure

et al. 2020

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The barrier properties of graphene coating are highly correlated with its microstructure which is then determined by the chemical vapor deposition (CVD) growth history on metals. We demonstrate here an unrevealed selective area oxidation of copper under graphene, which is derived from the implicit-etching-controlled CVD growth mode of graphene. By charactering and analyzing the selective area patterns of Cu oxidation, an etched pattern trace with nano/microvoids during graphene growth has been proposed to account for this. Based on such selective oxidation of Cu, distributed galvanic corrosion will be triggered and proceed locally at the interface of graphene-Cu system to coalescence together under a continuous corrosion environment, eventually presenting a homogeneous oxidation of Cu and gradual decoupling of graphene-Cu system. This discovery will assist our understanding of the barrier properties of two-dimensional materials and can be extended to other applications related to quality monitoring of grown materials and defects-based chemical modifications.

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Oxidative Originators of Graphene Barrier Coating Grown on Surfaces

Cited by 9 publications

References 117 publications

Corrosion behavior of Q235 steel in graphene oxide aqueous dispersion

Corrosion behavior of Q235 steel in graphene oxide aqueous dispersion

Chemical Vapor Deposition of N-Doped Graphene through Pre-Implantation of Nitrogen Ions for Long-Term Protection of Copper

Selective area oxidation of copper derived from chemical vapor deposited graphene microstructure

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