Method of indirect estimation of lubricating properties of petroleum products

In this research, a new method for evaluating the lubricating properties of prophylactic agents was developed. For the method, specialized metal models and a press with a strain-gauge s-shaped gauge, using for recording shear load indicators, were designed. Using the new method, prophylactic agents based on mixtures of light and heavy gas-oil catalytic cracking and delayed coking with the addition of tar or cracking residue as depressor additives were analyzed. A research of the hydrocarbon composition of the prophylactic agent, which was correlated with the removed shear load diagrams, was also made. As a result, the dependencies of the lubricating properties of fuels with a change in their fractional composition were identified, and the most effective PAs were determined.