Abstract
The lubrication process of mechanical equipment and treatment of assembly metals structures using fluids with efficient rheological properties requires a knowledge of their behavior in the presence and in the absence of organic impurities. The intrinsic physical property of the lubricating fluids has a dependency to the mechanical and physicochemical environment. This paper is focused on the assessment of the behavior of SAE20W40 multigrade oil under normal temperature and pressure, through the addition of water in vapor phase and solid paraffin. Results show that there is a decrease in the dynamic and kinematic viscosity for heterogeneous oils. The rate of degradation is greater in the mixture of water with oil. The addition of paraffin in the mixture caused an increase in viscosity. However, after certain RPM points, it is noted that the data curve became similar to the first mixture. This relaxation phenomenon is caused by the turbulence created by the rotating cylinder in oil. The use of a retentate paraffin shows that the added agent has acted as a surfactant
Highlights
The mix of raw materials into oil, e.g. industrial oils, requires a continuous process of monitoring their behavior before and after their implementation in service
For the other oil mixture, an increase in viscosity was noticed compared to the oil mixed with water vapor for 70 ≤ revolution per minute (RPM) ≤ 185
After a certain RPM≤185, it was noted that the curve thereof is almost coincident with the oil and water into steam
Summary
The mix of raw materials into oil, e.g. industrial oils, requires a continuous process of monitoring their behavior before and after their implementation in service. An empirical relationship showing the relationship between the viscosity (ʋ in cSt) and the temperature (T in Kelvin) is given in [2, 3, 8,9,10,11] and it uses two positive constants (A and B) related to the nature of the oil. The effective viscosity of the oil-water mixture, depends on several parameters such as the volume fraction of the dispersed phase and the temperature [4].
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