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Materials 2018, 11(10), 1989;

Low-Temperature CVD Graphene Nanostructures on Cu and Their Corrosion Properties

Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan
Department of Neurosurgery, Linkou Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan
Author to whom correspondence should be addressed.
Received: 20 August 2018 / Revised: 2 October 2018 / Accepted: 2 October 2018 / Published: 15 October 2018
(This article belongs to the Special Issue Carbon Nanomaterials: Graphene, Nanoribbons and Quantum dots)
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Chemical vapor deposition (CVD) graphene is reported to effectively prevent the penetration of outer factors and insulate the underneath metals, hence achieving an anticorrosion purpose. However, there is little knowledge about their characteristics and corresponding corrosion properties, especially for those prepared under different parameters at low temperatures. Using electron cyclotron resonance chemical vapor deposition (ECR-CVD), we can successfully prepare graphene nanostructures on copper (Cu) at temperatures lower than 600 °C. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, and potentiodynamic polarization measurements were used to characterize these samples. In simulated seawater, i.e., 3.5 wt.% sodium chloride (NaCl) solution, the corrosion current density of one graphene-coated Cu fabricated at 400 °C can be 1.16 × 10−5 A/cm2, which is one order of magnitude lower than that of pure Cu. Moreover, the existence of tall graphene nanowalls was found not to be beneficial to the protection as a consequence of their layered orientation. These correlations among the morphology, structure, and corrosion properties of graphene nanostructures were investigated in this study. Therefore, the enhanced corrosion resistance in selected cases suggests that the low-temperature CVD graphene under appropriate conditions would be able to protect metal substrates against corrosion. View Full-Text
Keywords: low temperature; chemical vapor deposition; graphene films; copper; corrosion low temperature; chemical vapor deposition; graphene films; copper; corrosion

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Huang, W.-H.; Lin, C.-H.; Lin, B.-S.; Sun, C.-L. Low-Temperature CVD Graphene Nanostructures on Cu and Their Corrosion Properties. Materials 2018, 11, 1989.

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