Fabrication of nanocrystalline nickel coatings by brush plating

Abstract

Nanocrystalline nickel coatings were fabricated on smooth steel substrates using electric brush plating technology. The coatings were characterised by X-ray diffraction, scanning electron microscopy, field emission scanning electron microscopy and atomic force microscope. Cetyltrimethyl ammonium bromide (CTAB) as cationic surfactant is used to improve the surface morphologies of coatings. With the content of CTAB increasing in electrolyte, the size of microscale nodules consisting of nanoscale grains were reduced, (111) texture was formed, and the surface having totally single nanosized grains structure was prepared on the surface of brush plating coatings. The formation mechanisms of nickel coatings deposited were also analysed based on the process of deoxidisation, adsorbing and withdrawing.

Influence of electric brush‐plating voltage on hydrophobic behaviour of a cauliflower‐like Ni coating surface

“…In the nickel electrolyte, the Ni 2+ ions were released from NiSO 4 solution, and Ni 2+ ions in the solution with H 2 O form hexa‐aqua complexes of [Ni(H 2 O) 6 ] 2+ (1). The addition of NH 3 with higher polar is ability to get the solution and results in [Ni(H 2 O) 6 ] 2+ can be replaced by six different complexes of coordinate [Ni(NH 3 ) n (H 2 O) 6− n ] 2+ (0 ≤ n ≤ 6) (2), which results in a monotonic increase in the average metal–ligand bond length and an increase in the stabilisation energy of the complexes [19, 20]. Meanwhile, the Ni 2+ ions in the solution with C 6 H 6 O 7 2− form complexes of NiC 6 H 6 O 7 (3), which temporarily prevent spare Ni 2+ to react.…”

“…, which results in a monotonic increase in the average metal-ligand bond length and an increase in the stabilisation energy of the complexes [19,20]. Meanwhile, the Ni 2+ ions in the solution with C 6 H 6 O 7 2− form complexes of NiC 6 H 6 O 7 (3), which temporarily prevent spare Ni 2+ to react.…”

Microstructural Modification of Brush-Plated Nanocrystalline Cr by High Current Pulsed Electron Beam Irradiation

“…However, these nodule units are not grain while boundaries of the cluster organization are not grain boundary. They are only decided by electrocrystallization conditions during the electrodeposition [23].…”

Tribological Properties of Attapulgite Nanofiber as Lubricant Additive for Electric-Brush Plated Ni Coating

“…Electric-brush plated technology has been applied widely in industry to prepare coatings with abrasion-resistant and corrosion-preventive properties owing to its flexibility, portability, and easy operation. Through a simple and mature process, nanocrystalline Ni coating with high hardness, fine wear, and corrosion resistance can be prepared [23,24]. Additionally, the electric-brush plated Ni coating has been widely applied in the abrasion repairing of mechanical parts such as crankshafts, piston rods, gear shafts, and so on.…”