Mendeleev University of Chemical Technology of Russia, Moscow, Russia:

V. Kh. Aleshina, Assistant, Dept. of Innovative Materials and Corrosion Protection, e-mail: aleshina.v.k@muctr.ru
A. A. Belevich, Laboratory Assistant of the Dept. of Innovative Materials and Corrosion Protection, e-mail: alexandrabelevich@mail.ru
N. A. Asnis, Leading Engineer of the Dept. of Innovative Materials and Corrosion Protection, e-mail: asnis@mail.ru
T. A. Vagramyan, Dr. Eng., Prof., Head of the Dept. of Innovative Materials and Corrosion Protection, e-mail: vagramian.t.a@muctr.ru

The effect of oil compositions with corrosion inhibitors on the protection of 08ps steel in the presence of certain surfactants has been studied. The effect of surfactants on the washing of applied compositions with corrosion inhibitors was studied. Issues related to the stability of oil compositions are considered. It is shown that the best results were obtained using the corrosion inhibitor RC4203 at a content of 10 wt. %. It has been found that in the absence of surfactants, oil compositions do not provide the required degree of surface cleaning. It was found that a number of surfactants, which facilitate subsequent cleaning when introduced into conservation oils, worsen their protective ability. It should be noted that with an increase in the concentration of surfactants, the protective ability of the oil deteriorates. Based on the experiments, it was found that in terms of protective ability and washability, the best properties of the developed conservation composition with the RC4203 inhibitor are achieved with the addition of 1.0 wt. % ALCAPAV 1816.C050 or 0.5 wt. % sodium laureth sulfate. The oil composition containing ALCAPAV 1816.C050 meets the requirements of consumers for protective ability, washability and stability. The introduction of sodium laureth sulfate led to an improvement in the washability of the oil, but to a decrease in the protective ability and stability. However, the addition of the emulsifier Eumulgin SML.20 at a concentration of 0.5 wt. % made it possible to obtain a stable composition without deterioration of the protective properties within 6 months and the degree of rinsability 2–3 cycles. At the same time, the protective characteristics of the oil did not deteriorate. Innovative compositions of preservation oils have been developed for temporary protection of carbon steels.

The researches were carried out using D. Mendeleev Center for collective use of scientific equipment, within the framework of the project No. 075-15-2021-688.

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