Corrosion Behavior of Tin, Indium and Sn-In Alloys.

The electrochemical behavior of tin, indium and Sn-In alloys in 0.5 M solutions of oxalic, Malic and citric acids at temperature 30-60 oC was studied by Potentiodynamic technique. The results showed that the peak height and corrosion rate increase with increasing the temperature. The corrosion of tin, indium and Sn-In alloys is affected by the formation of soluble complex species with organic acid anions and the order of decreasing aggressiveness is oxalic < malic < citric acid. the corrosion rate of sn-in alloys also affected by percentage of in in the alloy. where in form two phases alloys with sn ( and phase), these results were confirm with x-ray diffraction. the corrosion inhibition of tin, indium and their alloys in aqueous acidic solutions in presence of adenine, adenosine and 2, 4, 6 tris (2pyridyl)-1, 3, 5-triazine (pyt) as corrosion inhibitors was studied.