Effect of Cysteine as Environmentally Friendly Inhibitor on AA6061-T6 Corrosion in 0.5 M HCl: Electrochemical and Surface Studies

Kumari, Preethi P and Shetty, Prakash and Nagalakshmi, * and Sunil, Dhanya (2020) Effect of Cysteine as Environmentally Friendly Inhibitor on AA6061-T6 Corrosion in 0.5 M HCl: Electrochemical and Surface Studies. Surface Engineering and Applied Electrochemistry, 56 (5). pp. 624-634. ISSN 1068-3755

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Abstract

The inhibitive action of cysteine was investigated against the corrosion of aluminium alloy 6061-T6 (AA6061-T6) in a 0.5 M hydrochloric acidic medium in the temperatures range of 303–323 K using potentiodynamic polarization as well as electrochemical impedance spectroscopy methods. The electrochemical results of the former were validated by the latter. Cysteine showed mixed inhibitor behavior and exhibited good inhibition performance. The thermodynamic properties indicated mixed adsorption behavior of cysteine, which satisfied the Langmuir adsorption isotherm. The surface morphological investigation of both corroded and inhibited specimens was performed using a scanning electron microscopy and atomic force microscope, which revealed the adsorption of cysteine onto the alloy surface.

Item Type: Article
Uncontrolled Keywords: AA6061-T6, acid corrosion, corrosion inhibition, cysteine, electrochemical method
Subjects: Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 12 Jan 2021 09:22
Last Modified: 12 Jan 2021 09:22
URI: http://eprints.manipal.edu/id/eprint/156204

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