Licorice root extract as corrosion inhibitor for tin in sodium chloride solutions | ||
| Journal of Basic and Environmental Sciences | ||
| Volume 7, Issue 3, July 2020, Pages 191-194 PDF (228.06 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jbes.2020.371471 | ||
| Authors | ||
| M. Abdallah1; A. Y. El-Etre* 2; E. M. Kamar2; Salah Eid3 | ||
| 1Chemistry Department, Faculty of Science, Benha University, Benha, Egypt Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University, Makkah, Saudi Arabia | ||
| 2Chemistry Department, Faculty of Science, Benha University, Benha, Egypt | ||
| 3Chemistry Department, Faculty of Science, Benha University, Benha, Egypt Chemistry Department, College of Science and Arts, AlGurayat, Jouf University, AlGurayat, KSA | ||
| Abstract | ||
| The corrosion behavior of tin electrode in 0.6 M NaCl solution as well as the effect of addition aqueous extract of licorice root were investigated using potentiodynamic techniques. It was found that the inhibition efficiency increases as the concentration of extract is increased. The inhibitive action of the extract was interpreted in view of adsorption of the extract components at the tin surface. The results showed that the adsorption follows Freundlich adsorption isotherm. The negative value of free energy of adsorption suggests a spontaneous process. Moreover, the addition of licorice root extract increases the resistance of tin toward pitting corrosion. | ||
| Keywords | ||
| Corrosion inhibitor; Tin; Licorice root; Natural products | ||
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