Reducing friction is one of the main purposes of lubricating oil. In addition, lubricating oil has other functions, such as lubricating oil film can prevent rust; prevent metal from being corroded; lubricating oil can also play a cleaning role, and impurities inside the equipment are like Like the toxins in our body, they are removed from the oil through the filter element; the cooling effect, the friction between the metals generates heat, and the lubricating oil flows through the metal surface to take away the heat. Lubrication is a problem often encountered in equipment maintenance, but what exactly is lubrication? When it comes to lubrication, the scene in our mind may just be to apply oil or grease to the mechanical friction surface to reduce friction. While the concept is correct, it is only one aspect of lubrication. Many substances can be used for lubrication, the most common are lubricating oil (liquid oil) and lubricating grease (generally paste at room temperature), lubricating grease is thicker than lubricating oil, because lubricating grease is used on the basis of Thickener. The oils used for lubrication can be mineral oils derived from petroleum, or synthetic oils, and vegetable oils and animal oils can also be used as lubricating oils. Lubricating oils and greases used today mainly come from petroleum or synthetic oils. The oil before adding additives and thickeners is called base oil, which is the main component of lubricating oil. The base oil itself already has lubricity, but in order to optimize the overall performance of the base oil, we add some additives. Mineral oil can meet the general industrial lubrication requirements, so more than 90% of the current oil products are based on mineral oil, synthetic oil has better performance, and the use of vegetable oil is mainly due to environmental protection considerations. Additives can optimize the performance of base oils, inhibit unfavorable properties, enhance favorable properties, and even give base oils some new properties. However, the more additives, the better, because additives are chemical substances, and the types and proportions of various additives must be properly matched in order to achieve the desired effect. In addition, the amount of additives should also be considered in the occasion of use. For example, the lubricating oil (motor oil) of an automobile engine needs better cleaning and dispersing effect to remove carbon deposits and soot in the engine. Lubricating oil used for heavy-duty machinery may add Extreme pressure additives to increase wear resistance.  

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