Iodine value: measure of the degree of unsaturation of an oil, fat, or wax the amount of iodine, in grams, that is taken up by 100 grams of the oil, fat, or wax. Its standard methodology is the ASTM D92. The flash point is a general indication of the flammability or combustibility of a liquid. Most common used methodologies are ASTM D5800, DIN 51581 and ASTM D6375.įlash Point: the lowest temperature at which a liquid will form a vapor in the air near its surface that will “flash,” or briefly ignite, on exposure to an open flame. There are several standardized methodologies to measure it. Volatility: evaluates the total evaporation loss of a substance under a certain conditions. For lubricants, a high viscosity index is usually desirable. The higher the viscosity index, the less the viscosity of the fluid changes with the temperature. Viscosity Index: (ASTM D2270) is the measure of the change in viscosity with temperature. Kinematic viscosity (ASTM D445) is the viscosity measured while fluid is flowing under the force of gravity. It has a high resistance to motion within itself. Oil with a high viscosity would be thick, heavy bodied, and slow flowing. This property is a measure of an oil resistance to flow. Viscosity: is the most important property of a lubricating oil.
This includes bearing design and lubrication. Tribology: is the science of wear, friction and lubrication, and includes how interacting surfaces and other tribo-elements behave in relative motion in natural and artificial systems. A lubricant formulation is commonly composed by base oils, co-base stocks and additives.īase oil: represent the highest percentage in a formula from 85 to 100 %.Ĭo-base stocks: substances used to improve properties of the base oil such as viscosity index or solubility as examples, and can be from 5% to 20% in formula.Īdditives: are chemical compounds with a low percentage in a formula used to improve stability or mechanical properties. Lubricants are the technology with the highest contribution on energy savings and CO 2 emission reductions. In consequence, lubricants makes possible movement in terms of mobility and operational purposes in a sustainable (machinery life) and safety way. Lubricant: is a substance (liquid or solid) capable of reducing friction, heat and wear when introduced as a film between solid surfaces.
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