An impedance study on the corrosion properties of lacquered tinplate cans in contact with tuna and mussels in pickled sauce

Tinplate cans internally coated with two commercial epoxyphenolic lacquers were studied. Tuna and mussels in pickled sauce and an acetic model were used as electrolytes. EIS and polarization experiments were conducted at different time periods up to 150 days. Tin and iron dissolution was determined by atomic absorption spectrophotometry. Similar results were yielded by the three experimental techniques employed. The lacquer system with the greatest weight, constituted by a primer of epoxyphenolic lacquer (3-4 g/m(2)) and a topcoat of organosol lacquer (12-15 g/m(2)), showed good corrosion resistance For canned tuna and mussels in pickled sauce. (C) 1998 Elsevier Science Ltd. All rights reserved.