Journal :   Asian Journal of Research in Chemistry

Volume No. :   12

Issue No. :  6

Year :  2019

Pages :   303-306

ISSN Print :  0974-4169

ISSN Online :  0974-4150


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Inhibitive and Adsorption behaviour of date Palm Hemicellulose on Mild Steel Corrosion in Sulfuric Acid Media



Address:   Messaoud Gouamid1*, Louiza Zenkhri1, Soufiane Benhamida2, Elyacout Chebouat3, Khaled Charradi4
1Chemistry Department, Faculty of Mathematics and Materials Science, University of Ouargla, Algeria
2Physics Department, Faculty of Mathematics and Materials Science, University of Ouargla, Algeria.
3Faculty of Applied Science, University of Ouargla, Algeria.
4LaNSER, Research and Technology Center of Energy, Techno-park Borj-Cedria, Hammam-Lif, Tunis, Tunisia.
*Corresponding Author
DOI No: 10.5958/0974-4150.2019.00055.5

ABSTRACT:
The effectiveness of Date Palm Hemicellulose (DPH) as corrosion inhibitor of mild steel in sulfuric acid medium (pH=2) at 20–40 C°, was studied using Potentiodynamic polarization and electrochemical impedance methods. The corrosion rate and the inhibition efficiencies of (DPH) were calculated. (DPH) acted as an efficient mixed type inhibitor. The adsorption of (DPH) on the mild steel surface obeyed Redlich-Peterson adsorption isotherm (g = 0.98) and (R2 = 99.99%). The calculated adsorption thermodynamic parameters indicated that the adsorption was a spontaneous (?G°ad = - 3.2 KJ/mol.), exothermic (?H°ad = -14.97 KJ/mol.) process accompanied by a small increase in entropy (56.48 J/K mol.)
KEYWORDS:
Date Palm Hemicellulose, Mild steel, Corrosion inhibitor, electrochemical impedance, Redlich-Peterson isotherm.
Cite:
Messaoud Gouamid, Louiza Zenkhri, Soufiane Benhamida, Elyacout Chebouat, Khaled Charradi. Inhibitive and Adsorption behaviour of date Palm Hemicellulose on Mild Steel Corrosion in Sulfuric Acid Media. Asian J. Research Chem. 2019; 12(6):303-306.
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