Ecofriendly biopolymer as green inhibitor for corrosion control of 6061-aluminium alloy in hydrochloric acid medium

Charitha, B P and Padmalatha, * (2015) Ecofriendly biopolymer as green inhibitor for corrosion control of 6061-aluminium alloy in hydrochloric acid medium. International Journal of ChemTech Research, 8 (11). pp. 330-342. ISSN 0974-4290

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Abstract

The influence of biopolymer starch as an ecofriendly green inhibitor to control the corrosion of 6061 aluminum alloy in 0.25M Hydrochloric acid solution was studied by using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The percentage inhibition efficiency was found to increase with increase in the temperature (30 to 50 ) and as well as with increase in the concentration (100 to 800ppm) of the inhibitor. The kinetic and thermodynamic studies showed that starch underwent chemisorption by obeying Langmuir adsorption isotherm. The surface morphology studies were done by SEX-EDX analysis. This supported the adsorption of the inhibitor molecule on the metal surface. Results obtained by both the methods were in good agreement with one another

Item Type: Article
Uncontrolled Keywords: 6061-Al alloy, Hydrochloric acid, Potentiodynamic polarization, EIS, adsorption isotherm, SEM-EDX
Subjects: Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 26 May 2016 14:16
Last Modified: 26 May 2016 14:16
URI: http://eprints.manipal.edu/id/eprint/146173

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