Charakterizace základních kapalin pro environmentálně akceptovatelná maziva

Abstract

The bachelor thesis deals with the experimental study of physicochemical properties of environmentally acceptable lubricants. The theoretical part focuses mainly on the classification of lubricants and their use. Methods of viscosity measurement, viscosity index, surface tension, determination of total acid number and FTIR analysis are then described in more detail. The experimental part is devoted to the actual measurement of rapeseed-based base oils, saturated and unsaturated esters, their three sets of formulation and two commercially available oils. The result of the work is the measured characteristics of the monitored properties and the evaluation of the suitability of individual oils for use in stern tube lubrication. The results show that the properties of the individual formulations bear significantly the properties of the base oils used which is clearly summarized in the conclusion of these bachelor thesis. Due to the low hydrolytic stability of the tested oils and high application pressures it will be desirable to enrich the tested formulations with antioxidants and extreme pressure (EP) additives.