kIM LO HAN; Masood Bagheri Sadr
Abstract
Mineral lubricants derived from crude oil are relatively inexpensive products used in very expensive engines and industrial machinery and have a direct impact on the efficiency and ...
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Mineral lubricants derived from crude oil are relatively inexpensive products used in very expensive engines and industrial machinery and have a direct impact on the efficiency and life of these devices, so it must be ensured to ensure the correct operation of machinery. The quality of oils used is quite good, but unfortunately it has been seen that this important issue is not paid enough attention even by technical experts and in our country much less than it should be valued the quality of oil and how to control it. Petroleum products are the most complex in terms of the relationship between physical and chemical properties and practical efficiency. We know that the type and ratio of different compounds that exist in crude oil in different parts of the world, a country or a region, is very variable. Even in an oil well, especially at different depths, there are different types and percentages of chemicals in crude oil. Petroleum lubricating oils therefore contain a wide variety of hydrocarbons and their derivatives, especially as the components of lubricating oils are generally composed of very large molecules (C15 to C30).