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Evaluation of applicability of dielectric constant in monitoring aging processes in engine oils
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JAWO TECH S.R.O. Sp. z o.o., Branch in Poland Niepodległości 67, 44-370 Pszów, Poland
Faculty of Mechanical Engineering Opole University of Technology Mikołajczyka 5, 45-271 Opole, Poland
Publication date: 2019-06-30
Eksploatacja i Niezawodność – Maintenance and Reliability 2019;21(2):177–185
This paper reports on the study involving the development of a dependence between the selected physicochemical properties of engine oil and the variation of its dielectric constant, considered as an evaluation parameter for the degree of its exploitation. In order to get to know the selected phenomena that accompany oil aging, a decision was made to perform tests of the condition of engine oils at various stages of their exploitation. In addition to the analysis of the dielectric constant, measurements of total base number and (TBN) and infrared spectroscopy (IR) were also performed. The interdependence between the examined values is developed using the Pearson’s linear correlation coefficient. As a result, the variability of TBN and IR absorbance in the context of the change in the dielectric constant were evaluated. Following the realized experimental tests, it was found that the results demonstrate a satisfactory correlation between the selected physicochemical properties of the oil, which resulted in the adoption of an assumption of a high feasibility of application of dielectric constant as a diagnostic parameter in monitoring the state of exploitation of engine oil.
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