In order to study the effect of potassium chloride, sodium nitrite and sodium chloride on the corrosion of tin, in solutions of sodium hydroxide, the method of galvanic couples has been used. Cathodic and anodic potentials and the limiting current densities of the tin-platinum couple have been measured in order to determine the corrosion rate and type of control exerted by additives. The results indicate that the nature and concentration of additives exert an influence on the dissolution process of tin. Weight loss experiments have been also performed; data obtained are compared with electrochemical results. The significance of such additives on the corrosion of tin is discussed. © 1976.