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Asian Journal of Research in Chemistry
Year : 2019, Volume : 12, Issue : 6
First page : ( 303) Last page : ( 306)
Print ISSN : 0974-4169. Online ISSN : 0974-4150.
Article DOI : 10.5958/0974-4150.2019.00055.5

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

Gouamid Messaoud1,*, Zenkhri Louiza1, Benhamida Soufiane2, Chebouat Elyacout3, Charradi Khaled4

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 E-mail: basp73@gmail.com

Online published on 19 December, 2019.

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 (ΔG°ad = - 3.2 KJ/mol.), exothermic (δH°ad = -14.97 KJ/mol.) process accompanied by a small increase in entropy (56.48 J/K mol.)

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Keywords

Date Palm Hemicellulose, Mild steel, Corrosion inhibitor, electrochemical impedance, Redlich-Peterson isotherm.

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