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Curcumin Decorated Silver Nanoparticles as Bioinspired Corrosion Inhibitor for Carbon Steel

Author(s):

Prathamesh G. Joshi, Dheeraj Singh Chauhan*, Vandana Srivastava* and Mumtaz Ahmad Quraishi   Pages 1 - 10 ( 10 )

Abstract:


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.

Keywords:

Curcumin, Silver nanoparticles, Ultrasound, Corrosion inhibitor, Impedance spectroscopy, Potentiodynamic polarization

Affiliation:

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



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