Journal :   Asian Journal of Research in Chemistry

Volume No. :   4

Issue No. :  6

Year :  2011

Pages :   1001-1004

ISSN Print :  0974-4169

ISSN Online :  0974-4150


Registration

Allready Registrered
Click to Login

Thermodynamic and Adsorption Studies on Nyctanthes arbortristis (Night Jasmine) Leaves Extract as Corrosion Inhibitor for Mild Steel in 1N HCl Medium



Address:   V.G. Vasudha1 and R. Saratha2
1Department of Chemistry, Nirmala College for Women, Coimbatore-18
2Dept. of Chemistry, Avinashilingam University for Women Coimbatore-43, Tamilnadu
*Corresponding Author
DOI No:

ABSTRACT:
The corrosion inhibition of mild steel in 1N HCl by acid extract of Nyctanthes arbortristis (night jasmine) leaves (NAL) has been studied using weight loss method. The results of the study reveal that NAL extract is a very good environment- friendly corrosion inhibitor for mild steel in acid medium with maximum inhibition efficiency of 90% at 2% v/v concentration. Inhibition efficiency of the extract is found to vary with concentration, temperature and period of immersion. Thermodynamic consideration reveals that adsorption of extract constituents on mild steel surface is spontaneous. Langmuir, Temkin, Freundlich and Flory-Huggins adsorption isotherms are obeyed. Physical adsorption mechanism is proposed for the adsorption of the inhibitor from the trend of variation of inhibition efficiency with temperature and the values of ?G.
KEYWORDS:
Nyctanthes arbortristis leaves, corrosion inhibitor, mild steel, HCl medium.
Cite:
V.G. Vasudha, R. Saratha. Thermodynamic and Adsorption Studies on Nyctanthes arbortristis (Night Jasmine) Leaves Extract as Corrosion Inhibitor for Mild Steel in 1N HCl Medium. Asian J. Research Chem. 4(6): June, 2011; Page 1001-1004.
[View HTML]      [View PDF]



Visitor's No. :   127816