International Science Community Association Research Journal of Recent Sciences 2277 - 2502 5 1 2016 January 2 Corrosion inhibition performance of Coriander Seeds extract molecules for pure Aluminum in Hydrochloric acid Medium: A combined Experimental and Quantum chemical approach 27 34 EN Mohammadnia Leila 1 Department of Mathematics, Science and Research Branch, Islamic Azad University, Tehran, IRAN Jalal Amini 2 Department of Geometric Engineering, Collage of Engineering, University Of Tehran, Tehran, IRAN Alima Esther Irma Nougbode Yéwêgnon 1 Laboratoire d’Hydrologie Appliquée (LHA), Faculté des Sciences et Techniques, Université d’Abomey Calavi, Cotonou, BENIN Sessou Philippe 2 Laboratoire d’Etude et de Recherche en Chimie Appliquée (LERCA), Ecole Polytechnique d’Abomey Calavi(EPAC), Université d’AbomeyCalavi, Cotono, BENIN Abdoukarim Alassane 3 Laboratoire d’Hydrologie Appliquée (LHA), Faculté des Sciences et Techniques, Université d’Abomey Calavi, Cotonou, BENIN Abdou Karim Alassane Youssao 4 Laboratoire d’Etude et de Recherche en Chimie Appliquée (LERCA), Ecole Polytechnique d’Abomey Calavi(EPAC), Université d’AbomeyCalavi, Cotono, BENIN Cokou Pascal Agbangnan 5 Laboratoire d’Etude et de Recherche en Chimie Appliquée (LERCA), Ecole Polytechnique d’Abomey Calavi(EPAC), Université d’AbomeyCalavi, Cotono, BENIN Daouda Mama 6 Laboratoire d’Hydrologie Appliquée (LHA), Faculté des Sciences et Techniques, Université d’Abomey Calavi, Cotonou, BENIN Koko Codjo Dominique Sohounhloue 7 Laboratoire d’Etude et de Recherche en Chimie Appliquée (LERCA), Ecole Polytechnique d’Abomey Calavi(EPAC), Université d’AbomeyCalavi, Cotono, BENIN Jiménez Rubén Lagunas 1 Universidad Autonoma de Campeche, MÉXICO Medina Alberto Lorandi 2 Instituto de Ingenieria, Universidad Veracruzana, MEXICO Hermida Saba Guillermo 3 Instituto de Ingenieria, Universidad Veracruzana, MEXICO N.K. Shah 1 Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedazbad-380009, Gujarat, INDIA D.G. Ladha 2 Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedazbad-380009, Gujarat, INDIA P.M. Wadhwani 3 Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedazbad-380009, Gujarat, INDIA S. Thakur 4 Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedazbad-380009, Gujarat, INDIA M. Lone 5 School of Chemical Sciences, Central University of Gujarat, Sector – 30, Gandhinagar- 382030, Gujarat, INDIA P.C. Jha 6 School of Chemical Sciences, Central University of Gujarat, Sector – 30, Gandhinagar- 382030, Gujarat, INDIA > Research Paper 2014 8 25 2016 January 2 The study of inhibitive properties of coriander seeds extract (CSE) molecules over Aluminum surface in 1M hydrochloric acid (HCl) medium was performed by standard weight loss(gravimetric) and electrochemical impedance methods. Result from gravimetric measurements showed that behavior of inhibition efficiency is directly proportional to concentration of inhibitor. Impedance measurement reveals that charge transfer resistance and constant phase element values increases and decreases respectively with increase in concentration of inhibitor. The study indicates that the molecules present in the extract forms a protective layer at metal/solution interface. In addition quantum chemical study was also performed using density functional theory (DFT) to elucidate the inhibitory activity of individual molecule present in the extract. The result from quantum study showed that 10, 12-Hexadecadien-1-ol had the maximum power of adsorption at Aluminum surface to prevent it from corrosion. Copyright@ International Science Community Association