Molybdenum News Center

Molybdenum Application as Lubricants

Molybdenum disulfide, the most common natural form of molybdenum, is extracted from the ore and then purified for direct use in lubrication. Molybdenum disulfide because of its layered structure is an effective lubricant. When MoS2 particles are located between moving surfaces the MoS2 layers slide over each other, permitting the surfaces of steel and other metals to move fluidly, even under severe pressures, as bearing surfaces. Since molybdenum disulfide is of geothermal origin, it has the durability to withstand heat and pressure. This is particularly so if small amounts of sulfur are available to react with iron and provide a sulfide layer which is compatible with MoS2 in maintaining the lubricating film.

Molybdenum disulfide will perform as a lubricant in vacuo where graphite fails.
A number of unique properties distinguish molybdenum disulfide from other solid lubricants:

A low coefficient of friction (0.03-0.06) which, unlike graphite, is inherent and not a result of absorbed films or gases;
A strong affinity for metallic surfaces;
Film forming structure;
A yield strength as high as 3450 MPa (5 x 105 psi);
Stability in the presence of most solvents;

Effective lubricating properties from cryogenic temperatures to about 350oC in air (1200oC in inert or vacuum conditions).
A combination of molybdate and water soluble sulfides can provide both lubrication and corrosion inhibition in cutting fluids and metal forming materials. Oil soluble molybdenum-sulfur compounds, such as thiophosphates and thiocarbamates, provide engine protection against wear, oxidation and corrosion. Several commercial manufactures supply these additives to the lubrication industry.

More molybdenum product: http://www.molybdenum.com.cn
Tel: 0592-5129696 Fax：0592-5129797
E-mail:  This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

• < Prev
• Next >