P. Żabiński

Electrochemical Deposition of Selenium on Copper

The present work concerns studies aiming at determination of optimal parameters of obtaining selenium coatings on a copper substrate through the cathodic reduction from sulphate and citrate solutions. The voltammetric analysis was performed in selected solutions to define electrode reactions within the examined range of potentials as well as an influence of pH on their kinetics. The range of potentials in which selenium is reduced to Se0, and then to Se2- was determined. The next stage was performing several electrolysis, where the working electrode was copper. It was to define an influence of citric acid, sodium sulphate, electrolyte pH and the electrolysis potential on the quality of the obtained coatings. The coatings were analysed with the use of X-ray spectrofluorimetry, X-ray diffraction and scanning electron microscopy.

Modification of Electrodeposited FeNi Alloys by Applying External Magnetic Field

Alloy electrodeposition with superimposed uniform magnetic field leads to Lorentz force generation. The Lorentz force is a factor which is able to modify the deposit structure, its texture, morphology and magnetic properties. The objective of the presented research was to show the composition, morphology and the surface roughness development of Fe-Ni binary alloys electrodeposited under the influence of the uniform magnetic field. The applied magnetic field caused increase of the paramagnetic element content in the alloys. The surface roughness decrease with an external magnetic field application was observed.