Document Type : Original Article
Laboratoire de Chimie Analytique et Moléculaire/LCAM, Université Cadi Ayyad, Faculté Polydisciplinaire, Sidi Bouzid, B.P. 4162, 46 000 Safi, Morocco 2Laboratoire de Matériaux d’Electrochimie et d’Environnement, Faculté des Sciences, Université Ibn Tofaïl,14000Kénitra, Morocco
Laboratoire de Matériaux d’Electrochimie et d’Environnement, Faculté des Sciences, Université Ibn Tofaïl,14000Kénitra, Morocco
Department of Chemistry and Earth Sciences, P.O. Box 2713, Qatar University, Doha, Qatar
Laboratory of Materials, Nanotechnology and Environment, Faculty of Sciences, Mohammed V University in Rabat, P.O. Box. 1014, Rabat, Morocco
The tin electrodeposition in an acidic sulphate solution is reported. Electrochemical techniques (chronoamperometry, cyclic and linear voltammetry) are used to find out some kinetic parameters that govern the tin electrodeposition process while scanning electron microscopy (SEM) is used to explore the morphology of the coating. The influence on the tin electrodeposition of certain experimental parameters such as tin ion concentration, potential scan rate and deposition current density are described. Sharifker–Hills and Palomar Pardavé models are used to investigate the nucleation process of tin. It is found that the tin and proton reductions occur simultaneously. Dimensionless current-time transient related only to the tin reduction reaction fits well the theoretical transient for instantaneous mechanism nucleation. The diffusion coefficient has been determined by various electrochemical techniques and is found to be between 6.24×10-6 and 7.4×10-6 cm2s–1. i0 the exchange current density value is 0.0023 A/cm2 and the charge transfer coefficient αc is approximately 0.5. It is also noted that the deposition current density affects the morphology of the deposited tin.