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

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Abstract

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.

Original languageEnglish
Pages (from-to)624-634
Number of pages11
JournalSurface Engineering and Applied Electrochemistry
Volume56
Issue number5
DOIs
Publication statusPublished - 01-09-2020

All Science Journal Classification (ASJC) codes

  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Industrial and Manufacturing Engineering

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