The effect of zinc filler particle size on the properties of anti-corrosive oil compositions

• L.G. Knyazeva^1,2,3, L.E. Tsygankova², A.V. Dorokhov^1,2, N.A. Kur’yato⁴ and V.A. Kur’yato^1,2

¹ All-Russian Scientific Research Institute of Use of Machinery and Oil Products in Agriculture, Novo-Rubezhnyi per., 28, 392022 Tambov, Russia
² Derzhavin State University, ul. Internatsionalnaya, 33, 392000 Tambov, Russia
³ Tambov State Technical University, ul. Sovetskaya, 106, 392000 Tambov, Russia
⁴ Joint Stock Company “Pigment”, ul. Montazhnikov, 1, 392000 Tambov, Russia

Abstract: The multifunctional properties of steel coatings with preservative materials based on waste motor oil (WMO) and zinc filler with different particle diameters were studied using zinc powders PC1 (3–7 µm) and PCR1 (25–40 µm). The density of the oil compositions is shown to increase with increasing zinc powder concentration, especially in the presence of PCR1. Conversely, moisture permeability decreases, more noticeably in the presence of PC1. Increasing the zinc concentration from 40 to 60% and relative air humidity from 75 to 100% have little effect on moisture permeability. The kinematic viscosity of the compositions is only slightly dependent on zinc particle size. With an increase in the size of zinc particles, the shift in the potential of the steel electrode coated to the negative side in a chloride solution decreases, but the possibility of sacrificial protection is maintained at a Zn concentration of 40–60 wt%. The addition of Zn powder to WMO increases the protective effectiveness of the composition in a 0.5 M NaCl solution and a thermal moisture chamber. This increase is more significant when using zinc PC1 and is weakly dependent on changes in zinc concentration from 40 to 60%. Under natural conditions, the protective effect of oil compositions when filled with PC1 and PCR1 is almost the same and equals to 92–93% after three months of testing.

Keywords: steel, zinc-containing oil composition, protective efficiency, atmospheric corrosion

Int. J. Corros. Scale Inhib., 2026, 15, no. 2, 210-219
doi: 10.17675/2305-6894-2026-15-2-13

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