Samiappan Kathiravan - Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore ۶۴۱۰۲۰, Tamil Nadu, INDIA
Sankarankutty Jyothi - Department of Chemistry, School of Foundation Sciences, Kumaraguru College of Technology, Coimbatore ۶۴۱۰۴۹, Tamil Nadu, INDIA
Ganesan Ayyannan - Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore ۶۴۱۰۲۰, Tamil Nadu, INDIA
Jeganathan Ravichandran - Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore ۶۴۱۰۲۰, Tamil Nadu, INDIA
Gunasekaran RAJA - Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore ۶۴۱۰۲۰, Tamil Nadu, INDIA

The ethanol extract of Ruellia tuberosa L leaves (ERT) was used for Corrosion inhibition of aluminum in ۰.۵ M HCl using the weight loss method at various temperatures and immersion time. Further, the potentiodynamic polarization studies, electrochemical impedance spectroscopy, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopic, and scanning electron microscope analyses were carried out. The experimental result implies that the addition of inhibitor increases corrosion inhibition efficiency at various temperatures and it diminishes with increasing acid concentration. The ERT molecule’s adsorption on active sites of the aluminum surface was endothermic and is in physicochemical nature and it followed Langmuir adsorption isotherm. The obtained impedance results displayed a high convergence and the potentiodynamic polarization study exhibits mixed-type inhibition. The FT-IR, EDX spectroscopy, and scanning electron microscope studies have made it firmer than the inhibitor species are adsorbed on the Al surface.The ethanol extract of Ruellia tuberosa L leaves (ERT) was used for Corrosion inhibition of aluminum in ۰.۵ M HCl using the weight loss method at various temperatures and immersion time. Further, the potentiodynamic polarization studies, electrochemical impedance spectroscopy, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopic, and scanning electron microscope analyses were carried out. The experimental result implies that the addition of inhibitor increases corrosion inhibition efficiency at various temperatures and it diminishes with increasing acid concentration. The ERT molecule’s adsorption on active sites of the aluminum surface was endothermic and is in physicochemical nature and it followed Langmuir adsorption isotherm. The obtained impedance results displayed a high convergence and the potentiodynamic polarization study exhibits mixed-type inhibition. The FT-IR, EDX spectroscopy, and scanning electron microscope studies have made it firmer than the inhibitor species are adsorbed on the Al surface.

Ruellia tuberosa, Corrosion inhibition, Aluminium corrosion, Electrochemical impedance spectroscopy, Potentiodynamic polarization