Graphene: Corrosion-Inhibiting Coating
添加于 2012/2/27 14:56:54 3125次阅读 | 0次推荐 | 3个评论
We report the use of atomically thin layers of graphene as a protective coating that inhibits corrosion of underlying metals. Here, we employ electrochemical methods to study the corrosion inhibition of copper and nickel by either growing graphene on these metals, or by mechanically transferring multilayer graphene onto them. Cyclic voltammetry measurements reveal that the graphene coating effectively suppresses metal oxidation and oxygen reduction. Electrochemical impedance spectroscopy measurements suggest that while graphene itself is not damaged, the metal under it is corroded at cracks in the graphene film. Finally, we use Tafel analysis to quantify the corrosion rates of samples with and without graphene coatings. These results indicate that copper films coated with graphene grown via chemical vapor deposition are corroded 7 times slower in an aerated Na2SO4 solution as compared to the corrosion rate of bare copper. Tafel analysis reveals that nickel with a multilayer graphene film grown on it corro...
Dhiraj Prasai,Juan Carlos Tuberquia,Robert R. Harl,G. Kane Jennings,Kirill I. Bolotin,
American Chemical Society nano
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工程材料 » 无机非金属材料 » 无机非金属类光电信息与功能材料
graphene, copper, nickel, corrosion, Tafel, EIS