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Open AccessArticle

Long-Term Corrosion Protection of a Cupro-Nickel Alloy Due to Graphene Coating

1
Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800, Australia
2
Department of Mechanical Engineering, Bansal Institute of Research and Technology, Kokta, Anand Nagar, Bhopal 462021, India
3
Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Lavacchi
Coatings 2017, 7(12), 210; https://doi.org/10.3390/coatings7120210
Received: 20 September 2017 / Revised: 28 October 2017 / Accepted: 13 November 2017 / Published: 23 November 2017
This study demonstrates the corrosion resistance of a Cu-Ni alloy coated with a multi-layer graphene. This is one of the first demonstrations of long-term corrosion resistance due to graphene coating, which is crucial since earlier studies have suggested graphene-coated copper to be considerably inferior to bare copper in terms of corrosion during long-term exposure to a corrosive environment. The inferior corrosion resistance of graphene-coated copper arises due to defects and poor surface coverage by graphene. Since it is prohibitively difficult to develop defect-free graphene on metals at a commercially feasible scale, this study investigated the hypothesis for an alternative approach, i.e., to develop multi-layer graphene with a reasonable assumption that the areas of defects/poor coverage of a layer will be masked by the subsequent over-layer(s). This study has validated this hypothesis. Electrochemical investigations have demonstrated multi-layer graphene to improve the corrosion resistance of a Cu-Ni alloy by an order of magnitude. However, the most striking finding of this study is that the improvement in corrosion resistance due to the multi-layer graphene coating sustained the entire duration of a long-term test (~350 h). View Full-Text
Keywords: Cu-Ni alloy; graphene; EIS; Raman spectroscopy; chemical vapour deposition; corrosion Cu-Ni alloy; graphene; EIS; Raman spectroscopy; chemical vapour deposition; corrosion
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MDPI and ACS Style

Tiwari, A.; Singh Raman, R.K. Long-Term Corrosion Protection of a Cupro-Nickel Alloy Due to Graphene Coating. Coatings 2017, 7, 210.

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Coatings, EISSN 2079-6412, Published by MDPI AG
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