Electrochemical behavior of Zn–graphene composite coatings

Abstract

Synthesis and electrochemical properties of highly corrosion resistant Zn–graphene composite coating.

Influence of Graphene Oxide Content on the Zn-Gr Composite Layer Prepared by Pulse Reverse Electro-plating

“…However, for the Zn-Gr composite layers, due to the adsorption of graphene during electro-plating, it would have an alteration in the cathode surface energy which could produce different textures. 26 Therefore, the present experiments demonstrated that the incorporation of graphene considerably enhanced the crystal growth along the Zn (103) low index crystallographic planes, which could be ascribed to the following reasons, i.e., during electroplating Zn-Gr layer, there was a competition between the nucleation and crystal growth. Graphene provided more nucleation sites, hindered the crystal growth and reduced the grain size as shown in Figure 5.…”

“…Up to now, very few work for Gr reinforced Zn matrix composite is reported. Srivastava et al 26 prepared the electrodeposited Zn-Gr composite coating with enhanced corrosion resistance from a sulfate aqueous solution containing graphene that obtained via electrochemical exfoliation of graphite. And the composite coating exhibited the characters to change the coating's microstructures.…”

Effect of Graphene Oxide Concentration in Electrolyte on Corrosion Behavior of Electrodeposited Zn–Electrochemical Reduction Graphene Composite Coatings

“…Owing to the similar properties to graphene and availability of less equipment-intensive chemical methods for producing large quantities of GO by oxidation of low cost and abundant graphite powder [23,24], GO has been used as a reinforcement to fabricate corrosion resistant metal matrix composite coatings. In fact, related research results have already shown that GO as second-phase material improves mechanical, thermal, and electrical properties of metal matrix materials [13,[25][26][27].…”

“…Therefore, designing novel zinc based composite coatings by adding second-phase particles into the Zn matrix has become a focus point of research on this material [5][6][7]. A series of Zn-matrix composite coatings with different second-phase particles, such as TiO 2 [8], ZrO 2 [2], WO3 [9], SiC [10], NiO [11], carbon nanotube [12], and graphene [13] were successfully prepared by different methods. These Zn matrix composite coatings have enhanced corrosion resistance behavior with improved mechanical properties compared to pure zinc coatings.…”

“…Preparation methods of metal matrix composite coatings include chemical vapor deposition method [22], the chemical reduction method [23], and the electrochemical deposition method [13,26,27]. Compared to the above-mentioned methods, the direct current electrodeposition technique has been broadly used because of its simple preparation equipment, easy operation, low cost, and easy industrialized promotion.…”