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Effect of the dispersity of antifriction additives on the efficiency of plastic greases

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Chemistry and Technology of Fuels and Oils Aims and scope

Conclusions

  1. 1.

    Increasing the dispersity of MoS2 particles improves the antiwear properties of Li-greases to the greatest extent, and those of the Ca-complex greases to a lesser extent. The dispersity of graphite particles has a significantly lesser effect on the antiwear properties of Si- and Ca-complex greases. The effect of antifriction additives on the antiwear properties of Si-greases does not depend on their dispersity (over the range 1–150μ).

  2. 2.

    Increases in the dispersity of the additives is reflected mainly in changes in the value of Pcrit and in the wear at loads 10–30 kg(force)higher than Pcrit.

  3. 3.

    Graphite is not as efficient an antiwear additive as molybdenum disulfide in the greases examined. An exception is that addition of graphite “P” to Si-greases increases Pcrit to a greater extent than addition of MoS2.

  4. 4.

    Switching from MK-8 oil to the more viscous DS-8 oil which has better antiwear properties reduces the response of the greases prepared from it to the effect of graphite and MoS2. The efficiency of the antifriction additives shows up to a greater extent as their dispersity increases in the less viscous MK-8 oil than in the moreviscous DS-oil.

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Literature cited

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Authors
  1. Yu. S. Viktorova
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  2. V. V. Sinitsyn
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Additional information

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 9, pp. 53–55, September, 1969.

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Viktorova, Y.S., Sinitsyn, V.V. Effect of the dispersity of antifriction additives on the efficiency of plastic greases. Chem Technol Fuels Oils 5, 675–678 (1969). https://doi.org/10.1007/BF00729693

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  • DOI: https://doi.org/10.1007/BF00729693

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