Corrosion of tin cans and its inhibition

An investigation was carried out to study the corrosion behaviour of tin pl ate in citric acid in absence and presence of various concentrations of nit rate and sucrose and influence of glycine on tin corrosion in the presence of three fruit juices viz., orange, mango and pineapple by using Potentiody namic polarization technique. The results of this investigation revealed th at nitrate acted as weak inhibitor at 50 and 125 ppm concentrations and sho wed negligible inhibitory effect at 250 ppm of citric acid. Sucrose gave ma ximum inhibitory efficiency of 42% at 15% concentration. It was also found that glycine acted as an excellent corrosion inhibitor for tin plate: gave > 90% inhibitory efficiency in all the three juices studied and acted as ca thodic inhibitor. This study indicated the possible use of glycine as corro sion inhibitor of tin containers in canning industries.