| Autor: |
Nicoleta B; Faculty of Engineering, Dunarea de Jos University of Galati, 47 Domnească Street, 800008 Galati, RO, Romania.; Competences Center, Interfaces-Tribocorrosion-Electrochemical Systems, Dunarea de Jos University of Galati, 47 Domnească Street, 800008 Galati, RO, Romania., Lidia B; Competences Center, Interfaces-Tribocorrosion-Electrochemical Systems, Dunarea de Jos University of Galati, 47 Domnească Street, 800008 Galati, RO, Romania., Daniela-Laura B; Faculty of Engineering, Dunarea de Jos University of Galati, 47 Domnească Street, 800008 Galati, RO, Romania., Vasile B; Cross-Border Faculty, Dunarea de Jos University of Galati, 47 Domnească Street, 800201 Galati, RO, Romania., Jean-Pierre C; Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 44, B 2450-3001 Leuven, Belgium. |
| Abstrakt: |
The electrodeposition method was used to obtain nanostructured layers of Co/nano-CeO 2 on 304L stainless steel, from a cobalt electrolyte in which different concentrations of CeO 2 nanoparticles (0, 10, 20, and 30 g/L) were dispersed. The electrodeposition was performed at room temperature using three current densities (23, 48, and 72 mA cm -2 ), and the time was kept constant at 90 min. The influence of current densities and nanoparticle concentrations on the characteristics of the obtained nanostructured layers is also discussed. An X-ray diffractometer (XRD) was used to investigate the phase structure and cobalt crystallite size of the nanostructured layers, and a contact angle (sessile drop method) was used to assess the wettability of the electrodeposited layers. The roughness of the surfaces was also studied. The results show that the nanostructured layers became more hydrophilic with increasing nanoparticle concentration and increasing current density. In the case of pure cobalt deposits, an increase in the current density led to an increase in the size of the cobalt crystallites in the electrodeposited layer, while for the Co/nano-CeO 2 nanostructured layers, the size of the crystallites decreased with increasing current density. This confirms the nanostructuring effect of nano-CeO 2 electrocodeposited with cobalt. |
