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Open AccessArticle

Realization of Graphene on the Surface of Electroless Ni–P Coating for Short-Term Corrosion Prevention

1
School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China
2
College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
3
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
*
Author to whom correspondence should be addressed.
Coatings 2018, 8(4), 130; https://doi.org/10.3390/coatings8040130
Received: 3 March 2018 / Revised: 25 March 2018 / Accepted: 31 March 2018 / Published: 4 April 2018
(This article belongs to the Special Issue Advanced Coatings for Corrosion Protection in Extreme Environments)
Graphene was first fabricated on the surface of an electroless Ni–P coating/carbon steel (Ni–P–G) to improve its corrosion resistance. Meanwhile, an electroless Ni–P coating (Ni–P) was heated (Ni–P–H) under the same condition as Ni–P–G for comparison. The morphological results showed that a wavy multilayer graphene was formed on the surface of Ni–P–G. The layer number of the graphene film was 5–10 according to the analysis of Raman spectra and observation by a high-resolution transmission electron microscope. The ID/IG ratio calculated from the Raman spectrum revealed that the graphene growing at the grain of Ni–P–H had larger grain size than that growing at the grain boundary. The electrochemical results showed a higher Rp, a lower CPEdl, and a lower corrosion rate of Ni–P–G than Q235 steel, Ni–P, and Ni–P–H, indicating a higher corrosion resistance. In addition, the surface potential map achieved by a scanning Kelvin probe presented a more positive surface potential of Ni–P–G than Ni–P with the difference being around 375–750 mV, demonstrating a lower corrosion tendency of Ni–P–G. View Full-Text
Keywords: graphene; CVD; electroless Ni–P coating; corrosion resistance; TEM; SKP graphene; CVD; electroless Ni–P coating; corrosion resistance; TEM; SKP
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Wang, Q.-Y.; Yu, J.; Xu, J.; Fang, H.-M.; Liu, S.; Tang, Y.-R.; Xi, Y.-C.; Bai, S.-L. Realization of Graphene on the Surface of Electroless Ni–P Coating for Short-Term Corrosion Prevention. Coatings 2018, 8, 130.

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