Sodium Citrate as an Environmentally Friendly Corrosion Inhibitor of Steel in a Neutral Environment

In this work we investigated the inhibiting effect of sodium citrate, an environmentally safe corrosion inhibitor, on low-alloy steel 09G2S in a neutral environment using electrochemical methods. Potentiodynamic studies showed that sodium citrate reduces corrosion currents of 09G2S steel in a 0.1% N...

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Bibliographic Details
Published in:International journal of corrosion 2022-11, Vol.2022, p.1-9
Main Authors: Danyliak, Mariia Olena, Zin, Ivan, Rizun, Yuliia, Korniy, Sergiy
Format: Article
Language:English
Subjects:
Acids
Adsorption
Alloys
Aluminum alloys
Analytical methods
Carbon steels
Chloride
Corrosion
Corrosion currents
Corrosion effects
Corrosion environments
Corrosion inhibitors
Corrosion potential
Corrosion prevention
Corrosion resistance
Efficiency
Electrochemical impedance spectroscopy
Electrochemistry
Electrodes
Electron microscopy
High strength low alloy steels
Inhibitors
Low carbon steel
Manganese steel
Oil refineries
Petrochemicals
Petroleum
Petroleum industry
Petroleum refining
Potassium
Refineries
Sodium
Sodium chloride
Sodium citrate
Spectrum analysis
Water conveyance
Water supply
Water supply systems
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Summary:In this work we investigated the inhibiting effect of sodium citrate, an environmentally safe corrosion inhibitor, on low-alloy steel 09G2S in a neutral environment using electrochemical methods. Potentiodynamic studies showed that sodium citrate reduces corrosion currents of 09G2S steel in a 0.1% NaCl solution and reaches its maximum efficiency at a concentration of 2.5 g/l. Electrochemical impedance spectroscopy results indicate the adsorption of citrate ions and the formation of a protective film, which probably consists of Fe-citrate complexes. The formation of a protective film on the steel surface in sodium citrate-inhibited solutions was confirmed by the results of scanning electron microscopy and EDX analysis. Hence, our research shows that sodium citrate has satisfactory anticorrosion properties and can be used as a basic component during the development of environmentally safe inhibitor compositions for the protection of low-alloyed carbon steels in neutral environments of recirculating water supply systems in petroleum refineries, petrochemical plants, and other industries.
ISSN:1687-9325
1687-9333
DOI:10.1155/2022/1442537