Effect of pH on the Corrosion Behaviour of Nanocrystalline Cobalt

Electrochemical characteristics of nano and microcrystalline Fe–Cr alloys

“…Given that grain boundaries are high-energy sites with a high degree of disorder, the corrosion properties of nc materials are expected to be considerably different to coarser grained materials of similar chemical composition. This is supported in the literature [2][3][4][5][6][7] and in a recent review [8]. In many instances [6][7][8][9], the corrosion resistances of some materials is reported to be superior in nc form, while in other instances, the opposite is true [8,9]; such contrasts in the influence of nanostructure may have been seen to depend on the metal as well as corrosion media.…”

Corrosion tests of nickel coatings prepared from a Watts-type bath

“…[8][9][10][11][12][13][14] The physical and mechanical properties of nickel deposited from a Watts bath are affected by the electrodeposition parameters, such as current density, pH, cathode material, electrolyte agitation, deposition time, and electrolyte temperature, among others. 15,16 Pure nickel is ductile and tough because it possesses a face-centered cubic crystalline structure at temperatures below its melting point. Electrodeposition of Ni remains the basis of most decorative plating processes, and it is used in engineering applications and in electroforming processes.…”

“…The numbers from the images correspond to the number of the samples fromTable 2. 1 A dm 2 (Samples 1-4); 2 A dm 22 (Samples 5-8); 5 A dm 22 (Samples 9-12); 10 A dm 22 (Samples[13][14][15][16] …”

Effect of sliding speed on friction and wear behaviour of nanocrystalline nickel tested in an argon atmosphere

“…Nc metals have a large density of grain boundaries that act as preferential nucleation sites for oxides [15], as well as providing high diffusion paths for oxygen. Thus, in studying tribological properties of nc metals, attention must be given to role of testing environment.…”