In this thesis, electrochemical behaviour of aluminum in citric and perchloric acid solutions, at different pH values, with or without added sodium poly(styren sulfonate) was studied. The goal of the research was determining the impact of presence of sodium poly(styren sulfonate) in solutions on kinetic corrosion parameters. The potentiodynamic polarization method was used for that purpose. The atomic force microscopy was used to characterize the aluminum surface before electrochemical measurements. The influence of solution pH on kinetic corrosion parameters was determined. Considering the influence of passive oxide films on the corrosion of aluminum, the influence of the presence of polyelectrolytes on the passivation of aluminum and the potential inhibitory effect of polyelectrolytes was investigated. The presence of sodium poly(styrene sulfonate) has been shown to affect kinetic corrosion parameters. In solutions with citric acid, the presence of polyelectrolytes has a synergistic effect, enhances the corrosion of aluminum and affects the stability of the oxide film. In solutions with perchloric acid, the inhibitory effect is visible, but also the adsorption of polyelectrolytes on the aluminum surface, which affects the stability of the oxide film.