Solution-processed highly adhesive graphene coatings for corrosion inhibition of metals

• Published in: Nano research Vol. 12; no. 1; pp. 19 - 23
• Main Authors: Son, Gi-Cheol, Hwang, Deuk-Kyu, Jang, Jaewon, Chee, Sang-Soo, Cho, Kyusang, Myoung, Jae-Min, Ham, Moon-Ho
• Format: Journal Article
• Language: English
• Published: Beijing Tsinghua University Press 2019; Springer Nature B.V
• Subjects: Adhesive bonding; Adhesive strength; Annealing; Atomic/Molecular Structure and Spectra; Biomedicine; Biotechnology; Chemistry and Materials Science; Coatings; Condensed Matter Physics; Copper; Corrosion; Corrosion prevention; Corrosion resistance; Functional groups; Graphene; Hydrophobicity; Materials Science; Metal surfaces; Metals; Nanotechnology; Plates (structural members); Protective coatings; Research Article; Spray coating; metal; surface coating; corrosion; solution process; graphene
• ISSN: 1998-0124; 1998-0000
• DOI: 10.1007/s12274-018-2056-2

The corrosion of metals can be induced by different environmental and operational conditions, and protecting metals from corrosion is a serious concern in many applications. The development of new materials and/or technologies to improve the efficiency of anti-corrosion coatings has attracted renewed interest. In this study, we develop a protective coating composed of a bilayer structure of reduced graphene oxide (RGO)/graphene oxide (GO) applied to Cu plates by spray-coating and subsequent annealing. The annealing of the GO/Cu plates at 120 °C produces a bilayer structure of RGO/GO by the partial reduction of the spray-coated GO layer. This induces superior corrosion resistance and adhesion strength compared to those of GO/Cu and RGO/Cu plates because of the hydrophobic nature of the RGO surface exposed to the surroundings and the formation of Cu–O bonds with the O-based functional groups of GO. This approach provides a viable and scalable route for using graphene coatings to protect metal surfaces from corrosion.