Inhibitive Action of Ailanthus excelsa Roxb. Extract on the Corrosion of Mild Steel in Hydrochloric Acid Medium
R. Vasantha Jothi*, R. Saratha, D. Senthil Vadivu
DOI: 10.22607/IJACS.2017.504006
Volume 5, Issue 4 | Pages: 263-267
Abstract
The inhibitive action of Ailanthus excelsa Roxb. (AEL) on mild steel (MS) corrosion in 1.0 M hydrochloric acid
was studied using the chemical method. The effect of temperature on the corrosion behavior of MS in 1.0M
HCl with the addition of plant extracts was studied in the temperature range of 308-333 ± 1 K, and inhibition
efficiencies up to 98% for AEL were obtained. Adsorption of AEL on the MS surface was found to obey Langmuir
adsorption isotherm. Free energy of adsorption (∆Gads) calculated from the temperature studies revealed the
possibility of both physisorption and chemisorption. Scanning electron microscopy images confirm the formation
of protective film on the metal surface by adsorption of inhibitor which offers protection against acid attack.
Keywords
Ailanthus excelsa Roxb Corrosion inhibitor Mild steel Weight loss method Adsorption isotherm Scanning electron microscopy.References
No references available for this article.
Citation
R. Vasantha Jothi*, R. Saratha, D. Senthil Vadivu. Inhibitive Action of Ailanthus excelsa Roxb. Extract on the Corrosion of Mild Steel in Hydrochloric Acid Medium. J Appl Pharm Sci. 2018; 5(4):263-267 .