Sodium nitrite as a corrosion inhibitor of copper in simulated cooling water

Marziya Rizvi; Husnu Gerengi; Savas Kaya; Ilyas Uygur; Mesut Yıldız; Ibrahim Sarıoglu; Zafer Cingiz; Michal Mielniczek; Brahim El Ibrahimi

doi:10.1038/s41598-021-87858-9

Scientific Reports (Apr 2021)

Sodium nitrite as a corrosion inhibitor of copper in simulated cooling water

Marziya Rizvi,
Husnu Gerengi,
Savas Kaya,
Ilyas Uygur,
Mesut Yıldız,
Ibrahim Sarıoglu,
Zafer Cingiz,
Michal Mielniczek,
Brahim El Ibrahimi

Affiliations

Marziya Rizvi: Corrosion Research Laboratory, Department of Mechanical Engineering, Faculty of Engineering, Duzce University
Husnu Gerengi: Corrosion Research Laboratory, Department of Mechanical Engineering, Faculty of Engineering, Duzce University
Savas Kaya: Department of Pharmacy, Health Services Vocational School, Sivas Cumhuriyet University
Ilyas Uygur: Corrosion Research Laboratory, Department of Mechanical Engineering, Faculty of Engineering, Duzce University
Mesut Yıldız: Corrosion Research Laboratory, Department of Mechanical Engineering, Faculty of Engineering, Duzce University
Ibrahim Sarıoglu: Corrosion Research Laboratory, Department of Mechanical Engineering, Faculty of Engineering, Duzce University
Zafer Cingiz: Department of Electricity and Energy, Duzce Vocational High School, Duzce University
Michal Mielniczek: Corrosion and Materials Engineering, Department of Electrochemistry, Faculty of Chemistry, Gdansk University of Technology
Brahim El Ibrahimi: Applied Chemistry-Physics Team, Materials and Environment Laboratory, Faculty of Sciences, Ibn Zohr University

DOI: https://doi.org/10.1038/s41598-021-87858-9
Journal volume & issue: Vol. 11, no. 1
pp. 1 – 16

Abstract

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Abstract The corrosion inhibition behavior of sodium nitrite (NaNO2) towards pure copper (99.95%) in simulated cooling water (SCW) was investigated by means of electrochemical impedance spectroscopy (EIS) and dynamic electrochemical impedance spectroscopy (DEIS). NaNO2 interferes with metal dissolution and reduce the corrosion rate through the formation or maintenance of inhibitive film on the metal surface. Surface morphologies illustrated that the surface homogeneity increased on adding sodium nitrite. Sodium nitrite’s adsorption on copper surface followed the modified form of Langmuir, Freundlich and Frumkin isotherms. Physiosorption mode was involved in the corrosion protection. Electrochemical results revealed an corrosion resistance of copper increases on increasing the inhibitor concentration. The DEIS results indicated that copper corrosion mechanism could be hindered by 50% even after interval of 24 h by optimum concentration of sodium nitrite. The maximum inhibition was achieved with 2000 ppm of NaNO2. With this concentration, inhibition efficiency of up to 61.8% was achievable.

Published in Scientific Reports

ISSN: 2045-2322 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Medicine; Science
Website: https://www.nature.com/srep/

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