International Science Community Association Research Journal of Chemical Sciences 2231 - 606X 5 2 2015 February 18 Inhibitive action of 3-Hydroxy-3-(4methylphenyl-1-(4-sulphonato (sodium salt) phenyl triazene on Corrosion of Copper in HCl medium 59 63 EN Okechukwu R.I. 1 Department of Biological Sciences, Federal University of Technology, Owerri, Imo State, NIGERIA Iwuchukwu A.C. 2 Anuforo H.U. 3 Kumar D.Prem 1 Department of Chemistry, Sri Krishnadevaraya University, Anantapur–515 003, A.P., INDIA PraveenKumar A. 2 Reddy P.Raveendra 3 Yusuf A.J. 1 1 Department of Pharmaceutical and Medicinal Chemistry, Usmanu Danfodiyo University, Sokoto, NIGERIA Department of Pure and Applied Chemistry, Usmanu Danfodiyo University, Sokoto, NIGERIA Galadima A. 2 Garba 3 Z.N. 4 Nasir I. 5 Nirmala Baby 1 Department of Science and Humanities, Christian College of Engineering and Technology, Oddanchatram, Dindigul, Tamil Nadu, INDIA Manjula P. 2 Head, Department of Chemistry, APA College for Women, Palani, Dindigul, Tamil Nadu, INDIA Manimegalai S. 3 Department of Chemistry, APA College of Arts and Culture, Palani Dindigul, Tamil Nadu, INDIA ArthurRomuald Cakpo 1 Laboratoire de Chimie Inorganique et de l’Environnement (LaCIE), Faculté des Sciences et Techniques (FAST), Université d’Abomey -Calavi BP : 4521 Cotonou, République du BENIN Etienne Sagbo1 2 Laboratoire d’Hydrologie Appliquée (LHA), Université d’Abomey- Calavi, République du BENIN Daouda Mama 3 Laboratoire d’Etude et de Recherche en Chimie Appliquée (LERCA), Ecole polytechnique d’Abomey- Calavi (EPAC), Université etMohamedM. Soumanou 4 d’Abomey- Calavi, République du BENIN Davidenko O.A. 1 Chemical Department, Taras Shevchenko National University of Kyiv, 01601 Kyiv, UKRAINE SokolskyV. E. 2 The E.O. Paton Electric Welding Institute, National Academy of Sciences of Ukraine, 03680 Kyiv, UKRAINE LisnyakV. V. 3 RoikO. S. 4 Goncharov I.A. 5 GalinichV. I. 6 Onwu F.K 1 Department of Chemistry, Michael Okpara University of Agriculture Umudike, P.M.B 7267, Umuahia, Abia State, NIGERIA Ngele S.O. 2 Department of Industrial Chemistry, Ebonyi State University, P.M.B. 053 Abakaliki, NIGERIA Chandrashekhara K.G. 1 Department of Chemistry, Srinivas Institute of Technology, Merlapadav, Mangaluru-574 143, INDIA GopalakrishnaBhatN. 2 Department of Chemistry, Dr. M.V Shetty Institute of Technology, Moodbidri-574 225, INDIA Nagaraj P. 3 Shrinivas Ghodke 1 Applied Chemistry Department, Faculty of Technology and Engineering, The M. S. University of Baroda, Vadodara, 390 001, Gujarat, INDIA Chudasama Uma 2 Sharma Pratibha. 1 Coordination Laboratory, Department of Chemistry, Mohanlal Sukhadia University, Udaipur, 313001, Rajasthan, INDIA Soni Alpana. 2 Baroliya P.K. 3 Dashora Rekha 4 Goswami A.K. 5 > Research Paper 2015 1 29 2015 February 18 Corrosion inhibition of copper in 1N HCl solution by 3-Hydroxy-3-(4-methylphenyl)-1-(4-sulphonato (sodium salt) phenyl) triazene (HPST) has been studied using weight loss techniques at temperatures ranging from 303 to 343 K. It is observed that the proposed organic compound exhibit 84.4% inhibition efficiency at 303 K temperature in 1N HCl solution . Increase the concentration of HPST inhibition efficiency increases whereas increase in temperature decreases inhibition efficiency. The inhibitior show maximum inhibition efficiency for 0.002 M concentration of HPST at 303 K temperature. Activation energy (E), Enthalpy (H),Entropy (S) and Gibbs free energy have also been reported. The Langmuir isotherm was found to accurately describe the adsorption behavior of the compound. Copyright@ International Science Community Association