Inhibitory Action of Xylenol Orange on Aluminum Corrosion in Hydrochloric Acid Solution
Year: 2012
Type: conference-paper
Abstract: The purpose of this paper is to study the inhibition effect of xylenol orange on the corrosion of aluminum (2S Grade) in 0.4 -0.6 M HCl over the temperature range of 40-60°C. It also attempts to correlate both thermodynamic parameters and kinetic parameters with the inhibition effect. The inhibition efficiencies of xylenol orange are investigated by weight loss and potentiodynamic polarization methods. The corrosion rate of aluminum decreases with increasing inhibitor concentrations and the efficiency of inhibition increases with increasing concentration of inhibitor up to almost 87% in 0.4M HCl and up to 84% in 0.6M HCl. The concentrations of inhibitor were in the range of 2 mM to 8mM. Xylenol orange acts as a good inhibitor and inhibition efficiency increases with the inhibitor concentration, while it decreases with HCl concentration and temperature. The adsorption of inhibitor on the aluminum surface obeys the Langmuir adsorption isotherm equation. The inhibition effect is satisfactorily explained by both thermodynamic and kinetic parameters. The experimental data have been treated with adsorption theory and kinetic equations successfully. Polarization curves show that xylenol orange is a mixed-type inhibitor in hydrochloric acid.
Source: NACE CORROSION Conference
DOI: 10.5006/c2012-01101
Authors: Piyush S Desai, S M Kapopara
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4409506734