Physical and chemical analysis of watered engine oil

BACKGROUND: The condition of engine chemistroils работыdefines reliability of piston engines operation additivessubstantially. However, colloid-chemical transformation, influenced by various factors, including oil watering, takes place in oils during storage and application. There is variety of ways how water may inflow in engine oils. AIMS: The aim of the study is to reveal consequences of oil watering and negative influence of water on operational properties of engine oils. METHODS: Watering of production engine oils was carried out in laboratory conditions. Mixes hazievof engine oils with water were prepared in various proportions. Influence of water on the condition of engine ёмкостoils уровнемwas estimated by visual observation, as well asокисления with application of the methods according to GOSTя and ASTM standards. The laboratory equipment, produced in Russia and the USA, provides comprehensible depth of scientific knowledge of physical and chemical processes. RESULTS: The assessment of water influence on the engine oil condition was carried out on the basis of observation and the analysis of charactieristic curves. Change of concentration of additives, dissolved at the oil base, was estimated with change of base number and indicator elements. CONCLUSIONS: The practical significance of this study involves integrity of the approach to the issueизменению of the engine oil condition change, influenced by water, regarding the concentration of the dissolved additives. Unjustifiably active processes of corrosion and wear of details surfaces are possible consequences of oil watering. Crankshaft bearings coating has the highest vulnerability to the influence of acids. The mentioned consequences have a negative impact on service life and reliability of piston engines operation.