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Coating and Corrosion Protection
ArticleName Corrosion behavior of steel 08Yu in simulated service solution of heating systems
DOI 10.17580/chm.2023.07.09
ArticleAuthor A. G. Rakoch, A. A. Lobach, E. P. Monakhova, M. V. Zhelezny, V. V. Begnarsky, O. V. Volkova

National University of Science and Technology MISIS, Moscow, Russia:

A. G. Rakoch, Dr. Chem., Prof., Dept. of Steel Metallurgy, New Production Technologies and Metal Protection, e-mail:

O. V. Volkova, Cand. Eng., Senior Lecturer, Dept. of Steel Metallurgy, New Production Technologies and Metal Protection


JSC RIFAR, Gay, Russia:
A. A. Lobach, Cand. Eng., Innovation Director

V. V. Begnarsky, Cand. Eng., Deputy Director for Scientific and Technical Development


Certification Center, Moscow, Russia:
E. P. Monakhova, Cand. Eng., Chief Specialist in Corrosion Protection, e-mail:


Baikov Institute of Metallurgy and Materials Science, RAS, Moscow, Russia:
M. V. Zhelezny, Junior Researcher


The paper found that, despite the higher corrosion resistance of 08Yu steel compared to other low-carbon steels used to produce heating radiators, for the safe long-term operation of this steel, it is necessary to deoxygenate the alkaline (pH = 9.5) model solution used as a heat carrier both during heating and non-heating periods. It is shown that the processes of corrosion of steel 08Yu in a model solution proceed with the practical absence of inhibition of the anodic process, but with inhibition of the cathodic one. In this case, the overvoltage of the cathode process increases not only due to a decrease in the concentration of dissolved oxygen, but also with the formation of dielectric nanofilms consisting either of iron silicates or containing a layer of these compounds. The intensity of the formation of iron silicates in the films occurs due to the interaction of SiO32– anions due to their presence in the model solution with iron cations formed near the steel surface, with a reduced oxygen concentration to 0.05 mg/l in the solution. In an alkaline model solution, both at room temperature and 90 °C, which has not undergone deoxygenation, intense dissolution of steel 08Yu occurs with the formation of loose corrosion products – goethite (α-FeOOH) or lepidocrocite (γ-FeOOH), which practically do not have adhesion to metal basis.

keywords Steel 08Yu, heating systems, heat carrier, corrosion, dissolved oxygen concentration, temperature, corrosion products

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