During prolonged storage of DS-11 oil with 5% TsIATIM-339 additive, sludge accumulates on the tank bottoms; this sludge is an emulsion of water and oil, stabilized by the surface-active components of TsIATIM-339, including the stable free radicals present in the additive.
The emulsion sludges consist of 90–99% oil, 1.4–5.5% solid component, and 0.8–8.6% water. The solid component consists of 75–83% ash elements, including 31–54% barium. The number of paramagnetic particles per gram of solid component of the sludge may vary from 3 · 1017 to 6 · 1018.
Oil losses during long-term storage due to sludge formation may amount to 0.03–0.08% in aboveground tanks and 0.18–0.19% in trench tanks, which exceeds the established standard by a factor of 5–10.
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Sorokina, N.A., Shimonaev, G.S. & Marinchenko, N.I. Sludge formation in storage of diesel oil with additive. Chem Technol Fuels Oils 10, 473–474 (1974). https://doi.org/10.1007/BF00717268
- Free Radical