Copper-graphene oxide composite coatings for corrosion protection of mild steel in 3.5% NaCl

Copper/graphene composites: a review

“…with electrodeposited pure Cu and Cu/graphene composites (Fig. 40a) revealed that when compared to bare MS, the coated MS samples consistently yielded greater corrosion potential (E corr ) and lower corrosion current density (i corr ) [113]. Additionally, E corr was found to increase and i corr to decrease when going from the Cu-GO1 to the Cu-GO3 sample or, in other words, with increase in the graphene content.…”

“…The electrodeposition technique is an easy, cost-effective and scalable method to fabricate Cu/graphene composite coatings [72,[112][113][114] and foils or films [19-21, 24, 31, 33, 48]. In addition, electrodeposition being a low temperature process preserves the properties of graphene during the preparation of the composites, unlike in the conventional sintering processes, which may damage graphene because they may involve temperatures higher than its decomposition temperature ([ 600°C) [31].…”

“…Stirring [24,31,33,48,114] can be used to keep graphene in suspension during electrodeposition. Additions of anionic or polymeric surfactants have also been used to improve the wettability of the substrate to be coated and to prevent agglomeration [31,113,114]. These additions may, however, introduce heterogeneous impurities, that weaken the interfacial bonding of graphene sheets and matrix, adversely affecting the mechanical and physical properties of the composite coatings.…”

“…Cu and its alloys are of great interest for engineering applications in sea water due to their corrosion resistance, so that they could be used as coatings for corrosion protection. Electrochemical corrosion studies in 3.5% NaCl medium revealed that Cu/graphene composites are more corrosion resistant than pure Cu [112,113]. The Tafel curves obtained from bare mild steel (MS) and MS coated Figure 39 COF of different Cu/graphene oxide (GO), Cu/chemically reduced GO (RGO) and Cu/thermally reduced GO (TRGO) coatings.…”

Application of Graphene in Coatings: A Survey

“…The morphology, composition, crystal structure and hardness of the coatings were also analyzed. Inspired by some hydrophobic biological surfaces in nature (Tamilarasan T R, et al 2017), Biomimetic hydrophobic graphene coatings successfully prepared on Al alloy substrates (Zheng et al 2016); (Xue et al 2016) successfully synthesized for aluminum alloys Corroded graphene films; Long-term corrosion protection of steels was studied to use in chloride environments such as seawater (Raghupathy et al 2017); The effect of reduced graphene oxide (RGO) and molybdenum on the corrosion resistance of bipolar plate amorphous nickel phosphorus (Ni-P) in proton exchange membrane fuel cells was discussed in (PEMFC) (Lv et al 2016).…”