Preparation and Properties of Electrodeposited Ni-B-Graphene Oxide Composite Coatings

Abstract

With the rapid development of modern industries, the surface quality and performance of metals need to be improved. Composite electrodeposition (co-deposition) has evolved as an important technique for improving the surface performance of metal materials. Herein, a new type of graphene oxide (GO)-reinforced nickel–boron (Ni-B) composite coating was successfully prepared on a 7075 aluminum (Al) alloy by co-deposition. Characterization revealed a significant improvement in the mechanical and anti-corrosion properties of the composite with the incorporation of GOs. The composite showed a rougher, compact, cauliflower-like morphology with finer grains, a higher hardness (1532 HV), a lower rate of wear (5.20 × 10−5 mm3∙N−1∙m−1), and a lower corrosion rate (33.66 × 10−3 mm∙y−1) compared with the Ni-B alloy deposit (878 HV, 9.64 × 10−5 mm3∙N−1∙m−1, and 116.64 × 10−3 mm∙y−1, respectively). The mechanism by which GOs strengthen the Ni-B matrix is discussed.

Single-factor analysis of Ni–B–AC-catalyzed β-pinene hydrogenation based on hierarchical analysis

“…Whereas, as the ratio of Ni to B increased, saturation, encapsulation, and the agglomeration of Ni may occur during the dropwise addition of the reductant B, resulting in a gradual decrease or even leveling off of the selectivity and conversion. 21,43,44,45…”

A review on wear characterization of electrodeposited nickel matrix composites

“…According to their findings, the Ni-SiO2 composite coating was tougher (65 HV) than the coatings generated could withstand fast changes in temperature (from 100 °C to -35 °C) and were made of pure nickel (50 HV). Coating's remarkable performance was attributed to low surface energy and micro/nanostructures [22]. To optimise the even SiO2 nanocrystals distributed throughout the Ni matrix, researchers introduced a new in-situ production of Nanocomposites (s-SiO2) in ChCl: 2EG ionic liquid solvent (DES).…”

Effect of Graphene Content on the Micromorphology, Microhardness and Micro Frictional Resistance of Co-Ni-Graphene Composite Coating

“…By electrodeposition, these deposits can be produced and some of their specific properties can be controlled. In order to further improve the properties of nickel base alloy, the composite coating can be obtained by adding the second phase [1][2][3][4][5]. At present, the application of graphene is mainly reflected in its electrochemical properties, mainly including graphene polymer and graphene based inorganic nanocomposites [6][7][8][9].…”