EFFECT OF OXYGEN-CONTAINING OXIDANTS ON TIN CORROSION AND ITS ELECTROCHEMICAL-BEHAVIOR IN ACIDIC SOLUTIONS

The effect of oxygen-containing oxidants on the corrosion and the elec trochemical behavior of tin in acidic solutions was studied. It was fo und, that like iron and zinc, tin dissolution at constant potential is activated by the presence of oxygen-containing oxidants. At high cath odic polarization and in the presence of nitrate, nitrite and sulfate ions the tin dissolution rate is higher than at the zero-current poten tial. It is assumed, that the oxidizing agents promote the cathodic re action of the tin-hydride formation, where their reduction products se rve as proton donors in the process.