Electrochemical Investigations for the Corrosion Control of Aluminum using an Eco friendly Natural Inhibitor

Pushpanjali, M and Rao, Suma and Padmalatha, * (2015) Electrochemical Investigations for the Corrosion Control of Aluminum using an Eco friendly Natural Inhibitor. Journal for Electrochemistry and Plating Technology.

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Abstract

The inhibitive effect of Curry leaves extract (CLE) on the corrosion behavior of aluminum in sulfuric acid (pH = 3) was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques in the temperature range of 30 °C to 50 °C. The study was done by varying the concentrations of inhibitor from 0.05 g L−1 to 0.4 g L −1. The surface morphology was studied using scanning electron microscopy (SEM) and Energy- dispersive X-ray spectroscopy (EDX). Inhibition efficiency was found to increase with increase in inhibitor concentration and decrease with increase in temperature. CLE acted as an anodic type inhibitor at lower concentrations of inhibitor and behaved as a mixed type at higher concentrations of inhibitor and underwent both physisorption and chemisorption on the surface of the metal and followed the Langmuir adsorption isotherm

Item Type: Article
Uncontrolled Keywords: Aluminum, Sulfuric acid, Natural inhibitor, Curry leaves, Potentiodynamic polarization, EIS studies, Adsorption studies, SEM-EDX
Subjects: Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 26 May 2016 10:20
Last Modified: 26 May 2016 10:20
URI: http://eprints.manipal.edu/id/eprint/146163

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