The effect of inhibitors on the corrosion of tin in sodium chloride solution

Abstract

The corrosion behavior of tin in salt solutions at various temperatures and in the presence of air, nitrogen and oxygen atmosphere was investigated. For this purpose, model salt solutions containing sodium chloride (2 wt%) and sodium chloride with 0.002 wt% nitrite and nitrate were prepared. The system was chosen to perform the corrosion processes which could take place during the thermal treatment of some food products in tin plate cans, in the presence of oxidizing salts and different atmospheres. Electrochemical investigations were performed using potentiostatic and galvanostatic polarization methods. From the experimental data, the corrosion current, corrosion potential, polarization resistance and electron number were calculated. Auger electron spectroscopy and the XPS technique were used to determine the chemical composition investigations of solid surface. A possible corrosion mechanism was proposed.