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Engine Oil Additive Decomposition Under High Temperature And High Pressure
Aug 14, 2017

engine oil additive Decomposition under high temperature and high pressure

Molybdenum in the application of oil to now is the third generation of products. The first generation of "molybdenum disulfide", the second generation of "dialkyl dithiophosphoric acid molybdenum."

At present, the third generation of "nitrogen-modified organic molybdenum" is widely used in vehicle engine oil, which is based on the second generation of organic molybdenum, the introduction of antioxidant groups - amine (NH2) in chemical structure, Which greatly improve the anti-oxidation of these products, anti-corrosion properties, and with ZDDP, sulfur additives, clean dispersant, aromatic amine antioxidants have synergistic effect.

According to the experimental report to draw the curve shows that adding 0.5% of the amine-containing organic molybdenum, traveling 20,000 km can delay the loss of TBN equivalent to 7 TBN value.

The third generation of organic molybdenum to overcome the first generation of molybdenum disulfide powder particles suspended, evenly distributed and other problems, but also changed the second generation of organic molybdenum easy oxidation, corrosion phenomenon. Since the introduction of the antioxidant group - amine (NH2), so the third generation of organic molybdenum will erase the amine odor.

It is generally believed that the main role of organic molybdenum is the decomposition of molybdenum disulfide at high temperature and pressure, the formation of molybdenum disulfide film structure on the cylinder surface, the cylinder in the boundary lubrication and fluid lubrication can achieve excellent anti-friction effect The

It is also confirmed by experiment that the synergistic effect of the third generation amine-based organic molybdenum and ZDDP, sulfur-containing additives, clean dispersant and aromatic amine antioxidant is obviously effective in anti-friction and anti-friction effect. Will disrupt the leveling of the additives.

  Viscosity is too strong, such as the original recommended viscosity should be used 5w-30, but the use of 5w-40; 10w-40 or even higher viscosity of the oil, will cause the vehicle fuel consumption increases, the vehicle noise will become larger, the engine Running the resistance becomes larger, the oil film will be intermittent, the engine wear will increase. This is why the same engine in the country's average life expectancy with one-third of the life of one of the reasons.

    When the vehicle has used a certain mileage (usually 15-20 million km or more), the engine wear will increase, the gap between the piston ring and the cylinder will increase, if you find a slight burn oil can increase the viscosity of oil, thereby reducing Burn oil (but this is not a thorough solution to the method of burning oil).

    At present, many repair shops still hold old and backward knowledge of lubricants, preferring to use high concentrations of oil (5w-40 and 10w-40 oil-based), given the main reason is worried about the situation will burn oil, thus Cause customer complaints. But in fact 5w-40; 10w-40 of the oil for most of the vehicles are high concentrations of oil, not the most suitable for their vehicle oil.