This paper explains the employment of the electrochemical impedance spectroscopy (EIS) in examining lacquered tinplate used for making tins which were exposed to a mixture of organic acids, found in a natural sour cherry product, then to a solution of lemon acid which is found in a natural product of plum halves, to a solution of apple acid, found in a natural apricot mush product, and to NaCl solution which is in the natural product of sterilized peas. The aim of the research was to obtain the necessary parameters for calculating the corrosion rate of lacquered tinplate in tins filled with suitable organic acids used in food industry, by simulating the conditions which exist inside a tin, employing the EIS method in determining the degree of damage of lacquer under the influence of organic acids.