Study of the efficiency of coatings based on sunflower oil with paraffin additive for protecting steel against atmospheric corrosion

• A.A. Uryadnikov, L.E. Tsygankova, F.A. Aidemirova, M.N. Uryadnikova, U.V. Baisheva and I.V. Komarov

Derzhavin State University, ul. Internatsionalnaya, 33, 392000 Tambov, Russia

Abstract: In this work, the possibility of using anti-corrosion compositions based on sunflower oil with paraffin additives (10–70 wt.%) to protect St3 steel against atmospheric corrosion was studied. The anticorrosive coatings under study are shown to possess high protective efficacy, equal to 93%, 90%, and 90% at a paraffin concentration of 30%, according to gravimetric testing in a 0.5 M NaCl solution and a climatic chamber, as well as polarization measurements, respectively. Impedance spectroscopy was used to evaluate the porosity of oil compositions coatings. It was shown that the addition of paraffin and an increase in its concentration in oil reduces the porosity of the oil coatings. This is also confirmed by a decrease in the moisture permeability of the oil compositions with an increase in the paraffin concentration. The data obtained allow us to conclude that the increase in the protective effect with an increase in the concentration of paraffin in oil coatings of steel is due to a decrease in their porosity. Studies of the physicochemical properties of the conservation compositions considered have been carried out. It has been shown that increasing the paraffin concentration in oil compositions increases their viscosity and enhances adhesion to the steel surface. At the same time, the water contact angle of the compositions increases, resulting in hydrophobicity. Overall, all studies demonstrate the effectiveness of sunflower oil compositions with paraffin additives as surface films for protecting steel against atmospheric corrosion.

Keywords: steel, corrosion, protection, sunflower oil, paraffin, viscosity, porosity

Int. J. Corros. Scale Inhib., 2026, 15, no. 2, 156-170
doi: 10.17675/2305-6894-2026-15-2-10

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