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DOI: 10.15507/2658-4123.035.202504.606-622

UDK 620.197.3

Investigation of the Protective Effectiveness of Nitrogen-Containing Organic Compounds in Protecting Ferrous and Non-Ferrous Metals

Hoang Duc Quang
PhD (Chem.), Doctoral Student, Russian State Agrarian University – Moscow Timiryazev Agricultural Academy (49 Timiryazevskaya St., Moscow 127434, Russian Federation); Deputy Director for Science at the Joint Russian-Vietnamese Tropical Research and Technology Center (South Branch) (650000, Vietnam, Hanoi, Nghia Do, Cau Zai, Nguyen Van Huyen St, 63), ORCID: https://orcid.org/0000-0002-6487-8782, Scopus ID: 57201699580, This email address is being protected from spambots. You need JavaScript enabled to view it.

Sergey M. Gaidar
Dr.Sci. (Eng.), Professor, Head of the Department of Materials Science and Mechanical Engineering Technology, Russian State Agrarian University – Moscow Timiryazev Agricultural Academy (49 Timiryazevskaya St., Moscow 127434, Russian Federation); Leading Researcher, The Kosygin State University of Russia (1 bld, 33 Sadovnicheskaya St., Moscow 117997, Russian Federation), ORCID: https://orcid.org/0000-0003-4290-2961, Researcher ID: I-4723-2018, Scopus ID: 57191589797, This email address is being protected from spambots. You need JavaScript enabled to view it.

Anna M. Pikina
Cand.Sci. (Eng.), Associate Professor of the Department of Materials Science and Mechanical Engineering Technology, Russian State Agrarian University – Moscow Timiryazev Agricultural Academy (49 Timiryazevskaya St., Moscow 127434, Russian Federation); Senior Researcher, The Kosygin State University of Russia (1 bld, 33 Sadovnicheskaya St., Moscow 117997, Russian Federation), ORCID: https://orcid.org/0000-0003-0237-0534, Scopus ID: 57936447900, This email address is being protected from spambots. You need JavaScript enabled to view it.

Oksana M. Lapsar
Cand.Sci. (Eng.), Associate Professor of the Department of Materials Science and Mechanical Engineering Technology, Russian State Agrarian University – Moscow Timiryazev Agricultural Academy (49 Timiryazevskaya St., Moscow 127434, Russian Federation); Researcher, The Kosygin State University of Russia (Technologies. Design. Art) (1 bld, 33 Sadovnicheskaya St., Moscow 117997, Russian Federation), ORCID: https://orcid.org/0009-0005-2883-8627, Researcher ID: OYF-5859-2025, This email address is being protected from spambots. You need JavaScript enabled to view it.

Thi Thu Xuan Nguyen
Masterʼs Student, Joint Russian-Vietnamese Tropical Research and Technology Center (South Branch) (650000, Vietnam, Hanoi, Nghia Do, Cau Zai, Nguyen Van Huyen St, 63), ORCID: https://orcid.org/0009-0006-1594-3396, This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract
Introduction. A promising class of corrosion inhibitors is volatile or vapor-phase ones. They evaporate at ambient temperatures adsorbing on metal surfaces and providing reliable corrosion protection. Volatile corrosion inhibitors penetrate crevices and gaps inaccessible to contact inhibitors, inhibiting corrosion processes along layers of corrosion products. Their use is justified by sealing the protected space, preventing inhibitor evaporation. Currently, there are no low-volatile corrosion inhibitors resistant to temperatures above 80°C, so various packaging materials with low moisture and gas permeability are used. The use of such materials for preserving metal products has revealed several disadvantages: the hygroscopic nature of paper, the degradation of volatile corrosion inhibitors at polymer extrusion temperatures, and the high degree of manual labor required during preservation.
Aim of the Study. The study is aimed at developing an effective technology for protecting ferrous and non-ferrous metals using nitrogen-containing organic compounds – volatile corrosion inhibitors.
Materials and Methods. Based on the results of electrochemical and accelerated tests, the corrosion rate, protection level, and inhibition coefficient were calculated. St3 steel plates were selected as the samples on which the anticorrosive effect of volatile corrosion inhibitors was tested. Laboratory tests were conducted to determine the protective effectiveness of the resulting inhibitors. The reagents included ethnalolamine, boric acid, mono(aminoethyl)borate, di(aminoethyl)borate, and tri(aminoethyl)borate. The reagent ratio and reaction temperature were varied during the study.
Results. A series of volatile corrosion inhibitors were obtained in this study. It was determined that, in electrochemical testing in a 0.1 mol/l sodium chloride solution, the best results were obtained with a composition based on ethanolamine and boric acid in a three-to-one ratio, namely, tri(aminoethyl)borate. The optimal inhibitor concentration on steel surfaces during accelerated testing in an environment with 100% relative humidity is 200 g/m³. As a result of theoretical and experimental studies, there was found the dependence of the traction coefficient of the driving wheels on pneumatic tires during the general case of motion.
Discussion and Conclusion. The results obtained have potential for practical application in atmospheric corrosion protection of ferrous and non-ferrous metals. A promising area of application is the protection of steel equipment and electrical protection systems containing non-ferrous metals (copper, brass) using volatile inhibitors in agricultural production, mechanical engineering, and other fields.

Keywords: corrosion inhibitor, condensation reaction, aminoethyl borate, di(aminoethyl)borate, tri(aminoethyl)borate, ethanolamine, boric acid

Conflict of interest: The authors declare that there is no conflict of interest.

For citation: Quang H.D., Gaidar S.M., Pikina A.M., Lapsar O.M., Nguyen T.T.X. Investigation of the Protective Effectiveness of Nitrogen-Containing Organic Compounds in Protecting Ferrous and Non-Ferrous Metals. Engineering Technologies and Systems. 2025;35(4):606–622. https://doi.org/10.15507/2658-4123.035.202504.606-622

Authors contribution:
H. D. Quang – formulating the study idea, goals, and objectives; manuscript preparing: critical analysis of the draft manuscript, comments and corrections by the research team members, including at the pre- and post-publication stages.
S. M. Gaidar – formulating the study idea, goals, and objectives; manuscript preparing: critical analysis of the draft manuscript, comments and corrections by the research team members, including at the pre- and post-publication stages.
A. M. Pikina – conducting the study, including data collection; manuscript preparing: visualizing the study results.
O. M. Lapsar – conducting the study, including data collection; manuscript preparing: visualizing the study results and the data obtained.
T. T. X. Nguyen – conducting the study, including data collection; manuscript preparing preparation: visualizing the study results and the data obtained.

All authors have read and approved the final manuscript.

Submitted 04.06.2025;
revised 11.09.2025;
accepted 08.10.2025

REFERENCES

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