This work examines the chemical and morphological properties of the different types of aluminum foil lids used for packaging pureed fruit and vegetables (thickness, porosity and type of lacquer applied), their resistance to corrosion when in contact with simulant solutions and influence of the presence of residual air inside food packages.Resistance to corrosion was studied using electrochemical impedance spectroscopy (EIS). In an initial approach focused on quality, this technique was used to determine the protective power of the different types of lacquers and to observe changes in the electrode system over time (storage at 37°C for three days) with respect to permeability to electrolytes, occurrence of porosity and onset of a corrosive peeling process in the metal substrate.The results of the first accelerated tests carried out in electrochemical cells in air with saline solution, provided a quick, complete feedback on the corrosive behavior of peel-off lids and made it possible to determine the effectiveness of the different lacquering systems considered and the corrosion mechanisms at play.Electrochemical impedance measurements were also carried out in electrochemical cells, which enable the system to be kept in an oxygen-less environment for some time, in order to reproduce the physicochemical conditions that are observed in food packages and in a citric simulant solution with pH 4.0. The cells were stored at a temperature of 37°C and observed over time for up to 14days of contact. On the one hand, the results obtained confirmed the different corrodibility of the lid groups examined; on the other hand, they provided information on the commercial life of the packages made with materials that have a good degree of protection.The electrochemical impedance measurements performed with both electrochemical cells show how the value for resistance Rp and capacity Cc registered in the initial phases of the test are fundamental for predicting the corrosion resistance of materials.In conclusion, from the results obtained it was possible to define key physicochemical and electrochemical parameters, such as nature and porosity of the lacquer or presence of additives, to be taken into account in the production of peel-off lids for which aluminum protection is of fundamental importance. The electrochemical tests have provided information on the impedance values needed to ensure the required shelf life for this type of products, recently introduced on the market.