Antimony-Impregnated Carbon Graphite | St Marys Carbon

Antimony-Impregnated Carbon Graphite

Carbon/Graphite and Graphite Materials are inherently porous after the material processing.  It is common to impregnate these materials with a Resin or Metal to:

  • Increase the Strength,
  • Increase the Thermal Conductivity,
  • Reduce the Resistivity,
  • Reduce the Porosity, and/or
  • Impart Impermeability.

These benefits can lead to secondary benefits such as the impregnation with Antimony reducing the Porosity leading to a reduction in Blister formation particularly in light Hydrocarbon and hot Oil applications.

Some end-users experience that certain impregnants such as Babbitt (particularly Leaded Babbitt), Silver, and Antimony improve the friction and wear characteristics of the Carbon/Graphite or Graphite Component.  While this beneficiation may be actual, we have not seen this effect in laboratory testing.

Antimony is uniquely efficient at reducing porosity in Carbon/Graphite and Graphite materials.  This is due in part to the low Surface Temperature of the molten metal.

Metal Surface Tension1
Antimony (Sb) 367
Copper (Cu) 1290
Silver (Ag) 951
Tin (Sn) 570

1 at impregnation Temperature

Antimony melts at 1,167 °F (630.63 °C) which does constrain its application temperature limits.

Custom Components & Parts

We develop parts that are customized to each of our customer’s specific application requirements. Our unique technical knowledge and manufacturing expertise allows us to customize parts within our existing product line or as part of our new product development.

Learn More...

Mechanical Seals

St. Marys Carbon custom manufactures a variety of seal grades to suit any sealing application. We offer blank stock, various types of impregnations, intricately machined seals, non-polished seals, and polished seals. Our mechanical seals are used in a variety of pumping applications and are especially beneficial in any type of dry-running, harsh (e.g., high temperature, chemically corrosive) and sanitary environments.

Learn More...

Bearings / Bushings

St. Marys Carbon custom manufactures many sizes, shapes and quantities of bearings / bushings, including radial, thrust/axial and sleeve. Our bearings / bushings are used in a variety of pumping applications and are especially beneficial in any type of dry-running, sanitary environments and harsh conditions (e.g., high temperature, chemically corrosive).

Learn More...