Estimation of Lubrication Stability of Diesel Fuels under the Oxidation and Storage Conditions

The paper is given to investigation and definition of optimal parameters of oxidation of diesel fuels for the purpose of estimation its lubrication stability under the storage conditions. On the foundation of critical analyze of previous method’s parameters it were corrected the volume of oxidating fuel, the type of catalyze-active metal, which is contacting the fuel and also the fuel-metal and fuel-air contact-square. These corrections are allowed to increase the adequacy of chemical composition changes of diesel fuel at the oxidation to the same changes at the storage conditions. It was found that using the cuprum as the catalyze-active material of storage tanks increases the appearance of carbonyl and carboxyl oxidation products and decreases the appearance of hydroxyl oxidation products that is not adequately the chemical changes of diesel fuels while its storage in steel tare. On the foundation of three samples of diesel fuel investigation was found that decreasing of lubrication ability of diesel fuel at its storage for the 10 months could be forecasted by its oxidation via the developed method at least of 2, 4 and 6 hours with the following estimation lubrication ability of oxidated samples.