Graphene-based anticorrosive coatings for copper

Krishnan, M.; Aneja, Karanveer S.; Shaikh, Arif V.; Böhm, Sivasambu; Sarkar, Kanchan; Böhm, H.; Raja, V.S.

doi:10.1039/c7ra10167h

Cited by 56 publications

(22 citation statements)

References 24 publications

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“…Figure 11 and Table 6 clearly show that the voltages of corrosion (E c ) of UV‐WUA‐5 and UV‐WUA‐4 coatings were significantly higher than that of the other three ones, and the corrosion current density (i c ) was several orders of magnitude lower than that of others, suggesting that they were less likely to be corroded and the rate of corrosion was much lower than the three others. [ 31,32 ] This was consistent with the results obtained from the EIS test. In addition, what was worth noting was that E c of the UV‐WUA‐5 coating was slightly lower than that of the UV‐WUA‐4 coating, and i c was marginally higher than that of the UV‐WUA‐4 coating, indicating that the former was more likely to suffer corrosion at a faster rate than the latter.…”

Section: Resultssupporting

confidence: 90%

Synthesis and properties of UV‐curable waterborne urethane modified acrylic coatings with varying vinyl content

Zhang

Chen

Liu

et al. 2020

J of Applied Polymer Sci

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It has been an effective method to improve the metal protective performance of UV‐curable waterborne coatings by increasing the crosslinking degree. Hence, a series of UV‐curable waterborne urethane modified acrylic (UV‐WUA) coatings with different vinyl content were prepared. Firstly, a functional prepolymer containing carboxyl and hydroxyl groups was synthesized by free radical copolymerization (FRCP) using acrylic acid (AA), 2‐hydroxyethyl acrylate (HEA), methyl methacrylate (MMA) and butyl acrylate (BA). Next, it was grafted with different amounts of semi‐adduct of isophorone diisocyanate (IPDI) and HEA (IPDI‐HEA), and finally neutralized and hydrated, obtaining UV‐WUA dispersions which were then cured by UV to acquire cured films and coatings. Meanwhile, molecular structures, molecular weights, particle sizes, and Zeta potentials were characterized. Then, the heat resistance, mechanical performance, adhesion and the pencil hardness of the coatings were also investigated. Moreover, their protective performance was tested by electrochemical methods, and the surface morphology was analyzed by atomic force microscopy. The results showed that the coating had desirable comprehensive performance when vinyl content reached 0.86 mmol·g−1.

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Section: Resultssupporting

confidence: 90%

Synthesis and properties of UV‐curable waterborne urethane modified acrylic coatings with varying vinyl content

Zhang

Chen

Liu

et al. 2020

J of Applied Polymer Sci

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“…(4) Excellent mechanical properties: the C-C bond in the graphene structure makes graphene have good structural rigidity, which can effectively improve the flexibility and impact resistance of graphene-modified anticorrosion coatings [6].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Graphene-Modified Anticorrosion Coating and Study on Its Corrosion Resistance Mechanism

Wang

Cai

2020

International Journal of Photoenergy

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When aluminum alloy is present in a Cl−-rich environment, the surface oxide film is easily damaged, resulting in faster dissolution of the substrate. The application of graphene-modified anticorrosion coating can effectively prevent the occurrence of corrosion. In this study, to explore the corrosion resistance of graphene-modified anticorrosion coating on the surface of aluminum alloy, we prepared graphene-modified anticorrosion coating on the surface of aluminum alloy and investigated the corrosion resistance mechanism. Epoxy resin primer and polyurethane top coat were modified by predispersed reduced graphene oxide (rGO). Scanning electron microscope (SEM) and Raman spectrum were used to investigate the microstructure of graphene-modified anticorrosion coating, and it was found that the addition of rGO could effectively improve the porosity defect of epoxy resin primer. Electrochemical workstation was used to quickly characterize the corrosion resistance of graphene-modified anticorrosion coating, and the change of the electrochemical curve during soaking in 3.5% NaCl was investigated every 5 hours. It was found that the application of rGO to modify the anticorrosion coating could improve the corrosion resistance of the anticorrosion coating, and as the soaking time increased, the corrosion resistance of graphene-modified anticorrosion coating changed regularly. The study results indicated that when the content of rGO was 0.4%, the porosity of epoxy coating decreased from 1.54% to 0.33%, the porosity dropped by an order of magnitude, and the self-corrosion voltage was relatively positive (-0.72434 V). The self-corrosion current density was the lowest ( 1.948 × 10 − 6 A / c m 2 ), and at the low frequency, the impedance modulus was the highest (103). After the equivalent circuit fitting, the dispersion index was relatively high, the dispersion effect was relatively weak, and the corrosion resistance of the coating was improved. For graphene-modified anticorrosion coating, in the early stage of corrosion protection, the existence of pores and other defects in the coating might increase the dispersion effect, resulting in greatly decreased corrosion resistance of the coating. In the middle stage of corrosion protection, the pores in the coating would be completely filled by corrosive ions, resulting in a weakened dispersion effect. Therefore, the decrease in the corrosion resistance of the coating was slowed down and became stable.

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“…Because organic coatings have many advantages, including a high efficiency and easy operation, they have emerged as a promising anticorrosive protection material for metallic surfaces . However, volatile organic compounds and the high concentrations of pigments in organic coatings can be hazardous to the environment . So, organic coatings composed of water‐based polymers are attractive.…”

Section: Introductionmentioning

confidence: 99%

Synergic enhancement of the anticorrosion properties of an epoxy coating by compositing with both graphene and halloysite nanotubes

Han

et al. 2019

J of Applied Polymer Sci

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The aim of this research was to improve the corrosion resistance of metal surfaces with polymer coatings. Both graphene and halloysite nanotubes (HNTs) were introduced together into the epoxy resin coating for the enhanced barrier protection of the metallic surface. The anticorrosion behaviors of different coatings were comparatively evaluated by the potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS), and neutral salt spray (NSS) tests. The potentiodynamic polarization curves showed that the coating containing 0.5 wt % HNTs and 0.8 wt % graphene (H05G08EP) together had the most positive corrosion potential and the minimum corrosion current density. The EIS results revealed that graphene endowed the composite coatings with excellent electrochemical performance for anticorrosive purposes. The NSS tests indicated that H05G08EP endured the longest NSS time. These results suggest that H05G08EP had the best corrosion resistance.

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Graphene-based anticorrosive coatings for copper

Cited by 56 publications

References 24 publications

Synthesis and properties of UV‐curable waterborne urethane modified acrylic coatings with varying vinyl content

Synthesis and properties of UV‐curable waterborne urethane modified acrylic coatings with varying vinyl content

Preparation of Graphene-Modified Anticorrosion Coating and Study on Its Corrosion Resistance Mechanism

Synergic enhancement of the anticorrosion properties of an epoxy coating by compositing with both graphene and halloysite nanotubes

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