Pectin as a Potential Green Inhibitor for Corrosion Control of 6061Al–15%(V) SiC(P) Composite in Acid Medium: Electrochemical and Surface Studies

Charitha, B P and Padmalatha, * (2020) Pectin as a Potential Green Inhibitor for Corrosion Control of 6061Al–15%(V) SiC(P) Composite in Acid Medium: Electrochemical and Surface Studies. Journal of Failure analysis and Prevention, 20. pp. 1684-1696. ISSN 1547-7029

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Abstract

The studies on corrosion control of 6061Al– 15%(V) SiC(P) composite (AlMMCs) in 0.025 M HCl have been carried out by employing electrochemical techniques like potentiodynamic polarization (PDP) and electro�chemical impedance spectroscopy (EIS) using biopolymer pectin as inhibitor. Pectin showed increase in the inhibition efficiency, when the concentration of it was increased from 0.2 to 1.0 g L�1 . Inhibition efficiency also increased with increasing the temperature of corrosive medium from 303 to 323 K. The thermodynamic and kinetic calculations showed that pectin underwent chemisorption by following Langmuir adsorption isotherm. Surface morphology studies were carried using scanning electron microscopy (SEM), and it was supported by elemental analysis performed by using energy-dispersive x-ray (EDX) analysis technique. Suitable mechanism was proposed for the corrosion inhi�bition process. Maximum inhibition efficiency of 95% was observed for the addition of 1 g L�1 of pectin. Pectin emerged as an excellent green corrosion inhibitor for the corrosion control of AlMMCs in acid medium, with envi�ronment benefits.

Item Type: Article
Uncontrolled Keywords: 6061Al–15%(V) SiC(P) composite � Pectin green inhibitor � Potentiodynamic polarization � Electrochemical impedance spectroscopy � Surface morphology � Adsorption studies
Subjects: Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 06 Jul 2021 05:43
Last Modified: 06 Jul 2021 05:43
URI: http://eprints.manipal.edu/id/eprint/156926

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