Journal of Research in Applied Chemistry

Authors: Dr. A. Samsath Begum, Dr. A. Jamal Abdul Nasser, Dr. S.Syed Abuthahir, Dr. Susai Rajendran, Dr. Abdulhameed Al-Hashem

Abstract: The influence of aqueous extract Gloriosa superba leaf towards the corrosion on mild steel in 1.0M HCl has been investigated by weight loss method, polarization and impedance technique. The protective film adsorbed on the metal surface is confirmed by Fourier transform infrared (FTIR) spectroscopy. The results found shows that Gloriosa superba is a good inhibitor for mild steel in this medium. The inhibition efficiency of the compound was found to differ with the concentration of the inhibitor (2% to 10 % v/v), immersion time 2hr and temperature 303-333K.The inhibition efficiency was found high at (10% v/v) concentration of the inhibitor for 2hours (94.7%). Potentiodynamic polarizations were confirmed that the studied inhibitor behaves as a mixed type inhibitor.