Pressure Dependence of the Viscosity of Three Polyalkylene Glycol Ether Lubricants

Pressure dependence of viscosity of the lubricants is essential for most industrial applications.In the presentwork, experimental viscosities of three polyalkylene glycol ether lubricantsincluding PAG1 (23 ethylene oxide units),PAG2 (29 ethylene oxide units) and PAG3 (21 ethylene oxide units)were correlated using a linear relation with highaccuracy.This simple and accurate linear equation provides reliable extrapolation of viscosity data for this class oflubricant. In addition, we have analysed the pressure–viscosity coefficient() for these fluids.Thisproperty decreaseswhen the pressure increases for three lubricants.The following sequence have been found for this coefficient PAG3 > PAG2 > PAG1.

Keywords:

Correlation , Viscosity , Lubricants , Pressure dependence