Controllable Coating Graphene Oxide and Silanes on Cu Particles as Dual Protection for Anticorrosion

Sun, Jinhua,1987Chalmers tekniska högskola,Chalmers University of Technology (författare)

Although two-dimensional nanosheets like graphene could be ideal atomic coatings to prevent corrosion, it is still controversial whether they are actually effective due to the presence of parasitic effects such as galvanic corrosion. Here, we reported a reduced graphene oxide (RGO) coating strategy to protect sintered Cu metal powders from corrosion by addressing the common galvanic corrosion issue of graphene. A layer of silane molecules, namely, (3-aminopropyl)triethoxysilane (APTES), is deposited between the surface of Cu particles and the graphene oxide (GO), acting as a primer to enhance adhesion and as an insulating interlayer to prevent the direct contact of the Cu with conductive RGO, mitigating the galvanic corrosion. Due to this core−shell coating, the RGO uniformly distributes in the Cu matrix after sintering, avoiding aggregation of RGO, which takes place in conventional GO-Cu composites. The dual coating of GO and silane results in bulk samples with improved anticorrosion properties, as demonstrated by galvanostatic polarization tests using Tafel analysis. Our development not only provides an efficient synthesis method to controllably coat GO on the surface of Cu but also suggests an alternative strategy to avoid the galvanic corrosion effect of graphene to improve the anticorrosion performance of metal.

Harr Martinsen, Kristoffer,1990Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)harrk (författare)
Klement, Uta,1962Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)uk (författare)
Kovtun, AlessandroIstituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR),Institute for organic syntheses and photoreactivity (ISOF-CNR) (författare)
Xia, Zhenyuan,1983Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)zhenyuan (författare)
Fernandes Borges Silva, Plinio,1992Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)plinio (författare)
Hryha, Eduard,1980Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)hryha (författare)
Nyborg, Lars,1958Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)nyborg (författare)
Palermo, Vincenzo,1972Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)palermo (författare)
Chalmers tekniska högskolaIstituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR) (creator_code:org_t)

Ingår i:ACS Applied Materials & Interfaces15:32, s. 38857-388661944-82521944-8244

Av författaren/redakt...: Sun, Jinhua, 198 ...; Harr Martinsen, ...; Klement, Uta, 19 ...; Kovtun, Alessand ...; Xia, Zhenyuan, 1 ...; Fernandes Borges ...; visa fler...; Hryha, Eduard, 1 ...; Nyborg, Lars, 19 ...; Palermo, Vincenz ...; visa färre...

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