Thermodynamic Approach to the Purposeful Design of Synergistic Inhibiting Compositions for the Corrosion Protection in Aqueous Saline Media

Ledovskykh, Volodymyr; Vyshnevska, Yu. P.; Brazhnyk, I. V.; Levchenko, Sergey V.

doi:10.1007/s11003-019-00208-z

Cited by 3 publications

(1 citation statement)

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“…They are widely used to protect metals and alloys from the effects of corrosive environments. Corrosion inhibitors can be organic or inorganic in nature [1][2][3][4][5][6][7] and are classified depending on the method of use and the specificity of the inhibitory effect. However, a significant part of them can pose a danger to the environment and people.…”

Section: Introductionmentioning

confidence: 99%

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

Danyliak

Zin

Maksishko

et al. 2022

International Journal of Corrosion

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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.

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