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Comparative Analysis of Cystine and Cysteine as Green Corrosion Inhibitors of Aluminium Alloy AA7075-T6

Year: 2025

Type: article

Abstract: Cystine and cysteine as green corrosion inhibitors of the 7075 aluminium alloy in 0.1 M NaCl solution were analysed and compared. The inhibitive efficiency of the inhibitors was analysed by applying linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS) methods. Different concentrations of both inhibitors in NaCl solution were tested under different temperatures and times to determine the corrosion kinetic and thermodynamic parameters. Optical microscopy (OM) and scanning electron microscopy (SEM) were used for analysis of the aluminium alloy surface before and after the electrochemical measurements. The hydrophilicity of the alloy surface with tested inhibitors was compared by applying contact angle measurements. The results showed that cystine and cysteine are effective corrosion inhibitors, with different characteristics and duration of protection on the tested aluminium alloy. Cysteine showed better efficiency for short-term applications while cystine provided more stable protection over a longer period.

Source: Metallurgical and Materials Data

DOI: 10.30544/mmd43

Authors: Jovanka Pejic, Dunja Marunkić, Aleksandar Jovanović, Nikola Vuković, Bojana Radojković

Institutions: University of Belgrade, Institute of Chemistry, Technology and Metallurgy, Institute for Technology of Nuclear and other Mineral Raw Materials

Language: English

Topic: Corrosion Behavior and Inhibition

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W4408337234

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