Exploring the Nickel–Graphene Nanocomposite Coatings for Superior Corrosion Resistance: Manipulating the Effect of Deposition Current Density on its Morphology, Mechanical Properties, and Erosion‐Corrosion Performance

Abstract

The use of graphene‐based composite as anti‐corrosion and protective coatings for metallic materials is still a provocative topic worthy of debate. Nickel–graphene nanocomposite coatings have been successfully fabricated onto the mild steel by electrochemical co‐deposition technique. This research demonstrates the properties of nickel–graphene composite coatings influenced by different electrodeposition current densities. The effect of deposition current density on the; surface morphologies, composition, microstructures, grain sizes, mechanical, and electrochemical properties of the composite coatings are executed. The coarseness of deposited coatings increases with the increasing of deposition current density. The carbon content in the composite coatings increases first and then decreases by further increasing of current density. The improved mechanical properties and superior anti‐corrosion performance of composite coatings are obtained at the peak value of current density of 9 A dm−2. The incorporation of graphene sheets into nickel metal matrix lead to enhance the micro hardness, surface roughness, and adhesion strength of produced composite coatings. Furthermore, the presence of graphene in composite coating exhibits the reduced grain sizes and the enhanced erosion–corrosion resistance properties.

Spray pyrolysis of graphene oxide based composite for optical and wettability applications

“…As can be seen from the figure, the graphene oxide thin film has a peak of (001) at an angle of 10.9°. This peak is belonging to graphene oxide [31]. This finding is in agreement with the literature [32][33][34].…”

Hydrothermal Synthesis of Silver Decorated Reduced Graphene Oxide (rGO) Nanoflakes with Effective Photocatalytic Activity for Wastewater Treatment

“…This change suggests an increase in the number of sp 2 atomic domains following the reduction of GO [46]. The intensity ratio of D to G band defines disorder degree in graphite layers; I D /I G = 0.87 for a doped free sample (GO), I D /I G = 1.15 for Agdoped samples and increase in ratio indicates a decrease in the average size of sp 2 carbon domains after synthesis of Ag@rGO, while intensity ratio between 2D and G band (I 2D /I G ) which is 1.69, have been used to probe electrons concentration in rGO [31,32,35,47].…”

Hydrothermal Synthesis of Silver Decorated Reduced Graphene Oxide (rGO) Nanoflakes with effective Photocatalytic Activity for Wastewater Treatment

“…In case of Ag-rGO Raman spectrum observed at 1338 cm -1 (D band), 1583 cm -1 (G band) and 2682 cm -1 (2D band) there is an additional peak centered at 2900 cm -1 (D+G band) that represents disorder due to combination scattering in Fig. 7 synthesis of Ag@rGO, while intensity ratio between 2D and G band (I 2D /I G ) which is 1.69, have been used to probe electrons concentration in rGO [25,26,30,42].…”