Lubricating oil additives
They form a ductile, ash-like film at moderate to high contact temperatures to degrees F. However, there is more to lubricants than just viscosity. They are activated at high loads and by the high contact temperatures that are created.
Viscosity modifiers are often plastic polymers. Both market volume and value rose from to , but the growth rate was very low along with the slowdown in lubricating oil demand. It ultimately causes acids which produce corrosion and sludge which results in surface deposits and viscosity to increase to form. The emulsifier additive can be thought of as a glue binding the oil and water together, because normally they would like to separate from each other due to interfacial tension and differences in specific gravity. The four large additive companies have all set up manufacturing plants in Singapore, from where they supply additives mainly for the Asian market including China. Consider this the next time you observe water in a reservoir. Some chlorine-based EP additives exist but are rarely used due to corrosion concerns. They also help protect the base oil from oxidation and the metal from damage by corrosive acids. The topic is hotly debated on the Internet. In engines, the emphasis is on lowering friction to improve fuel economy. For many additives, the longer the oil remains in service, the less effective the remaining additive package is in protecting the equipment. The result may be an increase in corrosion-related problems.
Pour Point Depressants The pour point of an oil is approximately the lowest temperature at which an oil will remain fluid. These four suppliers offer packages of formulated components, most of which they captively manufacture.
Japan in contrast imports most of its products. They are typically used in gear oils and give those oils that unique, strong sulphur smell.
Baselines for incoming oils are set and the health of the lubricant is monitored based on viscosity alone. Lubricant Additives - A Practical Guide Noria Corporation Lubrication professionals often become very familiar with the base oil viscosity of their lubricants. This combats the tendency of the oil to become thin at high temperature.
Oxidation inhibitors, as they are also called, are used to extend the operating life of the oil.
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