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Lubricant Additive Low Temperature Fluidity Of Lubricating Oil
Aug 14, 2017

 lubricant additive Low temperature fluidity of lubricating oil

Lubricant pour point is an important indicator of low temperature fluidity of lubricating oil. For the production, transportation and use are important. High pour point lubricants can not be used at low temperatures. On the contrary, in areas with high temperatures, it is not necessary to use lubricating oil with low pour point. Because the lower the pour point of lubricating oil, the higher the cost of production, resulting in unnecessary waste. In general, the pour point of the lubricating oil should be 5 to 7 ° C lower than the lowest temperature of the use environment. But in particular, also mentioned that in the selection of low-temperature lubricants, oil should be combined with the freezing point, low temperature viscosity and viscosity characteristics of a comprehensive consideration. Because of the low pour point of the oil, its low temperature viscosity and viscosity characteristics may also not meet the requirements.

Pour point and pour point are indicators of low-temperature oil flow, the two no difference in principle, but the measurement method is slightly different. The pour point and pour point of the same oil are not exactly equal, the general pour point is higher than the freezing point of 2 ~ 3 ℃, but there are exceptions.

The acid value is an indicator of the presence of an acidic substance in the lubricating oil in units of mgKOH / g. Acid value of strong acid value and weak acid value of the two, the two are the total acid value (referred to as TAN). What we usually call "acid value" actually means "total acid value (TAN)".

The base value is an indicator of the content of alkaline substances in the lubricating oil in units of mgKOH / g.

The base value is also divided into strong base and weak base, both of which are the total base (TBN). What we usually call "base" actually means "total base number (TBN)".

The neutralization value actually includes the total acid number and the total base number. However, in addition to another note, the general said "neutral value", in fact only refers to the "total acid value", the unit is mgKOH / g.

Moisture refers to the percentage of water content in the lubricating oil, usually the weight percentage. The presence of moisture in the lubricating oil will destroy the oil film formed by the lubricating oil, deteriorate the lubricating effect, accelerate the corrosion of the organic acid to the metal, and so that the oil is prone to sediment. In short, the less moisture the better oil.

Mechanical impurities are found in the lubricating oil insoluble in gasoline, ethanol and benzene and other solvents or colloidal suspended solids. Most of these impurities are gravel and iron and the like, as well as some of the solvent-derived organic metal salts brought by additives. In general, the mechanical impurities of the lubricating base oil are controlled below 0.005% (the machine is considered to be below 0.005%).

Ash refers to the specified conditions, the burning of the remaining non-burning substances. The composition of the ash is generally considered to be some metal elements and their salts. Ash has different concepts for different oils, and ash can be used to determine the refining depth of oil for base or non-additive oils. For the addition of metal salt additives oil (new oil), ash becomes a quantitative control of the amount of additives added means. Foreign use of sulfuric acid ash instead of ash. The method is: in the oil burning after burning ashes before adding a small amount of concentrated sulfuric acid, so that the metal elements of additives into sulfate.