Molybdenum Disulfide Used in the Lubrication Field

Molybdenum disulfide (MoS2) is known as the "king of lubrication" and has unique advantages in the lubrication field. It has a layered structure and still keeps good lubrication property under severe conditions such as high temperature, high pressure, high rotation, and ultra-low temperature. MoS2 is a kind of natural excellent solid lubricant because of its low friction coefficient with only 0.05. It also has excellent properties such as natural weak alkalinity and excellent anti-oxidation ability, which is used in the aviation field and can extend the mileage of engine oil.

What’s the property of MoS2? It is a kind of black solid powder with metallic luster and the  melting point is as high as 1185℃. The chemical and thermal stability are good and the Mohs hardness ranges from 1.0 to 1.5. The initial decomposition temperature is 1370℃when it reaches 1600℃, it decomposes into metal molybdenum and sulfur. MoS2 is insoluble in water, dilute acid and concentrated sulfuric acid, generally insoluble in other acids, alkalis, and organic solvents, but soluble in aqua regia and boiling concentrated sulfuric acid.

The basic material of molybdenum disulfide lubricant is made of ultra-fine MoS2. When the lubricant is used on the metal surface, a dry film will be shaped quickly on the surface to make the protective film on the surface of metal parts, which can resist high temperature, strong pressure, tenacity, and parts are not easy to wear, burn and bite.

MoS2 can be used for lubrication in many situations, some examples are as follows:

1.0 As the parts such as slide rails for cabinets or drawers, guide rails for elevators and bearings for motors etc. bear high pressure under high load, they need lubricant to reduce friction and prolong service life.

2.0 In the process of material machining, the material needs to be punched, stamped, etc., and lubricant needs to be applied to minimize the friction between the mold and the plate, then produce finished product meeting the requirements, which can prevent rust on the surface of the material.

3.0 In some extreme environments, it is easy for fasteners and threads to slip or bite during assembly. It is necessary to use lubricant to reduce friction, avoid parts sticking and prevent rust.

• < Prev
• Next >