Prathamesh G. Joshi, Dheeraj Singh Chauhan*, Vandana Srivastava* and Mumtaz Ahmad Quraishi Pages 1 - 10 ( 10 )
Background: Curcumin-stabilized silver nanoparticles (Cur-AgNp) synthesized by a facile chemical method. The synthesized AgNp was, for the first time, used as a bio-derived corrosion inhibitor for carbon steel in the 1M sulphamic acid medium.
Methods: The electrochemical studies via impedance spectroscopy, potentiodynamic polarization, and surface analysis are reported in the communication. The maximum inhibition efficiency of 92.87% obtained at 800 mgL-1 .
Results: The impedance measurements revealed an elevation in the polarization resistance with growth in the inhibitor concentration, which supports the adsorption and inhibition behavior of Cur-AgNp on the steel surface. The inhibitor functioned by adsorption on the steel surface and obeyed the Langmuir kinetic-thermodynamic isotherm with a mixed mode of physical/ chemical adsorption. The potentiodynamic polarization study revealed cathodic predominating behavior.
Conclusion: The SEM analysis depicted the development of a protective inhibitor film on the steel substrate, and FTIRATR analysis of the inhibited steel surface supported the adsorption of the corrosion inhibitor on the metallic surface.
Curcumin, Silver nanoparticles, Ultrasound, Corrosion inhibitor, Impedance spectroscopy, Potentiodynamic polarization
Department of Chemistry, Indian Institute of Technology (Banaras Hindu University), Varanasi-221005, Center of Research Excellence in Corrosion, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Department of Chemistry, Indian Institute of Technology (Banaras Hindu University), Varanasi-221005, Center of Research Excellence in Corrosion, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261