Modeling of the corrosion process in the interaction of tinplate with vegetable canned food

When choosing metal packaging for canned vegetables, it is advisable to take into account their corrosivity, because the inner surface corrosion is one of the factors affecting product quality during storage. To rationalize the corrosion tests of metal packaging materials, it is advisable to replace food with model media - organic acids solutions. The aim of this work was to study the corrosion kinetics of electrolytic tinplate in model media-aqueous solutions of oxalic (mass fraction 0.25-1.00%) and citric (mass fraction 0.25-1.50%) acids, as well as their compositions. The uniform corrosion rate was measured by the linear polarization resistance method, pitting corrosion-zero resistance amperometry method. The tests were carried out using the “Expert-004” corrosion-meter, according to a two-electrode scheme. For oxalic acid solutions with a mass fraction of 0.25% and 0.50% and for all citric acid solutions, the process is characterized as uniform corrosion - the pitting corrosion rates average steady values are 7-11 times less than the corresponding uniform corrosion rates values (1...