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Graphene: Corrosion-Inhibiting Coating

lwrobinson 添加于 2012-4-28 08:54 | 2105 次阅读 | 0 个评论

作者
Prasai D, Tuberquia JC, Harl RR, Jennings GK, Bolotin KI
摘要
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...
详细资料
- 文献种类:期刊
- 期刊名称: ACS Nano
- 期刊缩写: ACS Nano
- 期卷页: 2012年第6卷第2期 1102-1108页
- ISBN: 1936-0851
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