Electrodeposition Of Nickel Coatings Research Articles

Effect of isonicotinic acid on electrodeposition of nickel coatings from Watts electrolyte

Effect of isonicotinic acid on electrodeposition of nickel coatings from Watts electrolyte

Electrodeposition of nickel coatings in choline chloride: ethylene glycol deep eutectic solve

The work was financed by statutory activity subsidy from the Polish Ministry of Science and Higher education - grant number 0401/0200/17.

Electrodeposition of Nanocrystalline Nickel Coatings from a Deep Eutectic Solvent with Water Addition

The electrodeposition of nanocrystalline Ni coatings from electroplating baths containing deep eutectic solvents (analogues of room-temperature ionic liquids) is studied. To improve physicochemical properties of electrolytes and enhance mechanical properties and corrosion resistance of Ni films, we suggest introducing extra water into plating baths based on a deep eutectic solvent. The effect of water addition on the electrodeposition of nickel coatings is investigated using an electrolyte containing choline chloride, ethylene glycol, nickel chloride and water in the molar ratio of 1: 2: 1: x where x is equal to 6, 9, 12, 15 or 18 (i.e., Ethaline + NiCl2 + xH2O). The introduction of water into the liquid mixture results in an increase in conductivity and a decrease in viscosity. The addition of extra water leads to more uniform and finer grained deposits. The electrodeposited Ni coatings with an average crystallite size of about 5 to 7 nm have an fcc crystal nanostructure. An increase in water content in the plating bath results in an increase in the microhardness of deposits and the inverse Hall–Petch effect is observed. According to electrochemical impedance spectroscopy measurements, the coatings with higher corrosion resistance are deposited from Ni plating bath containing water addition.

Characteristics of the Galvanic Baths for Electrodeposition of Nickel Coatings Using the Hull Cell

Electrodeposition of polycrystalline nickel onto carbon steel substrate has been studied from different types of solutions: (bath I) the Watts nickel plating bath, (bath II) the sulfate-chloride nickel plating bath for production of the SUPER Ni coatings, (bath III) the sulfamate nickel plating bath, and (bath IV) the chloride nickel plating bath. A detailed study has been made on the influence of the bath composition on the mass increment and thickness of the deposited Ni coatings. Cathodic current efficiency of the Ni electrodeposition has been also studied. The electrochemical anodic de-plating technique has been used for measuring the thickness of nickel coatings according to ISO 2177:2003. Evaluation of the effect of bath composition on the quality of the galvanic nickel coatings, was carried out using the Hull cell. In a single test, the range of current densities which provided a desired plating characteristic at a given total current, was previewed. Principles of the electroplating process using the Hull cell have also been explained.

Surface modification of composites with metal nanoparticles

This work examines the possibility of using copper, nickel, and cobalt nanoparticles in the electrodeposition of nickel coatings and for surface modification of porous silicon, and also colloidal silver particles for surface modification of silver-containing polymer-matrix composites. It is shown that the deposition of metal nanoparticles may influence the morphology, electronic structure, and phase composition of the surface and the catalytic, electrical, and optical properties of the material.

Laser surface alloying: Mechanism of formation and improvement of surface properties

Improvement of the surface of materials to bring about desirable properties may be achieved by laser surface alloying. After a brief review of the mechanisms of formation of surface alloys by the addition of specific elements and laser melting, different examples are reported, namely: Improvement of mechanical surface properties of aluminum base alloys by the electrodeposition of nickel coatings followed by laser treatment. Improvement of the thermal fatigue lifetime of low carbon steels; a nickel coating is first obtained by plasma spraying. Improvement of mechanical properties of iron base alloys by powder injection of tungsten particles.