Effect of some nitrogen-heterocyclic compounds on corrosion of tin, indium, and their alloys in HClO4 |
| |
Authors: | Abdel-Rahman El-Sayed Hossnia S Mohran and Hany M Abd El-Lateef |
| |
Institution: | (1) Faculty of Science, Chemistry Department, Sohag University, Sohag, 82524, Egypt |
| |
Abstract: | Abstract The effect of adenine, adenosine, and 2,4,6-tris(2-pyridyl)-1,3,5-triazine (TPTZ) on the electrochemical and corrosion behavior
of tin, indium, and tin-indium alloys in 0.5 M HClO4 solution at different temperatures was studied. The inhibition efficiency increases with an increase in the concentration
of adenine and adenosine in the case of tin and indium. However, the effect of two mentioned compounds on the corrosion rate
of the studied alloys gives an opposite effect. In the presence of TPTZ, the inhibition efficiency increases as the concentration
of the inhibitor is increased in the case of tin. In the case of both indium and its investigated alloys, the maximum inhibition
efficiency is obtained at the lowest concentration of TPTZ (10−6 M). The adsorption of the studied compounds is found to obey the Frumkin adsorption isotherm. The standard enthalpy
\Updelta Hads° , \Updelta H_{\rm ads}^{^\circ } , entropy
\Updelta Sads° , \Updelta S_{\rm ads}^{^\circ } , and free energy changes of adsorption
\Updelta Gads° \Updelta G_{\rm ads}^{^\circ } are calculated and discussed. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|