Skip to main content

Prediction of Service Life of Aviation Hydraulic Fluids Based on Phosphate Esters

The thermal stability and kinetics of change in acid numbers of phosphate-ester-based aviation hydraulic fluids with various dissolved water contents are studied. It is shown that the service life of such hydraulic fluids shortens several times if they are used at temperatures above 100°C and dissolved water contents above 0.5%. The critical concentrations of the anticorrosion additive at which its functional effectiveness is inadequate are determined. Accelerated tests using the proposed method can evaluate the effectiveness of the anticorrosion additive and predict the expected service life of phosphate-ester-based hydraulic fluids under the proposed application conditions.

This is a preview of subscription content, access via your institution.

Fig. 1
Fig. 2
Fig. 3
Fig. 4

References

  1. TU 38.401-58-57-93, Working fluid NGJ-5u.

  2. Exxon HyJet IV-A plus, Fire-Resistant Phosphate Ester Aviation Hydraulic Fluid; http://www.exxonmobil.com

  3. Skydrol-LD-4 Type IV Fire Resistant Hydraulic Fluids; http://skydrol-ld4.com/technical_bulletin_skydrol_4.pdf

  4. Yu. E. Raskin and E. M. Vizhankov, Tr. 25 GosNII MO RF, No. 55, Graliya, Moscow (2010), pp. 85-196.

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Yu. E. Raskin.

Additional information

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 6, pp. 30 – 32, November – December, 2015.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Raskin, Y.E., Vizhankov, E.M. Prediction of Service Life of Aviation Hydraulic Fluids Based on Phosphate Esters. Chem Technol Fuels Oils 51, 593–597 (2016). https://doi.org/10.1007/s10553-016-0644-y

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10553-016-0644-y

Keywords

  • hydraulic fluid
  • phosphate esters
  • thermal stability
  • acid number
  • hydrolysis
  • anticorrosion additive
  • service life