Learn More About Graphite Emulsion Category & Uses

Graphite emulsion is in milk state and its main component is micro powder graphite. Strictly speaking, it should be called as graphite colloid, it is a black paste with a slight ammonia odor and is easily dispersed in water. We have both forging graphite emulsion and conductive graphite emulsion for you to choose from. Here, we'd like to introduce these graphite emulsion products in details as well as how to use them.

A barrel of opened graphite emulsion
Forging Graphite Emulsion

Forging graphite emulsion is a kind of highly dispersed colloidal graphite emulsion. It takes high carbon graphite as raw material and then obtain high-purity, ultra-fine natural flake graphite powder after ultra-micro grinding. It is formulated with water as carrier and added with appropriate suspension dispersing agents, emulsifiers, stabilizers, colloidal protective agents and other chemical additives. It has good lubricity, demolding, chemical stability, high-temperature adhesion properties, and can extend the service life of molds and dies and improve the quality of the forging parts. It is environmentally friendly and easy to use. As a result, it is an ideal high temperature mold release lubricant for ferrous and non-ferrous metal thermal processing, and is widely used in forging and metal forming industry.

Forging graphite emulsion has a wide range of applications, including:

  • It can be applied to various substrates. After drying, it forms a cured layer that exhibits stable performance under high-temperature and high-vacuum conditions. It has no corrosive effect on metals and provides appropriate adhesion.
  • It can be used as an additive in the vacuum coating process It is applied on the evaporation pool baffle plate and walls of a vacuum coating machine, so that the aluminum vapor condenses directly on the graphite layer. When the deposited aluminum reaches a certain thickness, it can be easily removed.
  • It can be used as a coolant in tungsten wire drawing in the manufacture of electronic materials.
  • It can be used as anti-sticking and mold releasing agent under high temperatures in the machinery manufacturing industry.
A large spoon of graphite emulsion is taken from the barrel.
Conductive Graphite Emulsion

Conductive graphite emulsion can be used for cable outer sheath surface coating, and can form a uniform, continuous conductive coating film on the outside of the sheath. It is a conductive graphite coating that uses high-purity, ultra-fine natural flake graphite as the conductive medium, with polymer materials as the main binder, and a certain amount of inorganic materials as modifiers.

It uses water as the dispersing medium. It neither uses environmentally harmful substances, nor contains heavy metals. It is an environmentally friendly conductive coating. The film formed after drying has a smooth, glossy surface, with good conductivity, adhesion, and moisture resistance, and can be used in humid environments.

Many rows of well-sealed conductive graphite emulsion barrels are neatly placed.
How to Use Graphite Emulsion Correctly?
Conductive Graphite Emulsion

Before use, stir the forging graphite emulsion evenly. There may be a small amount of solid sediment after long time of placing, but it can be restored to the original suspended uniform state after stirring without reducing the using effect.

Users can decide whether to dilute the original solution and the dilution ratio based on different requirements or experience. The following ratios are for reference.

  • For forgings in complex shapes or difficult to demold, dilute with water at a ratio of 3–5 for large-sized forgings, and 5–10 for medium and small-sized forgings.
  • For general forgings and gear precision forgings, dilute with water at a ratio of 5–15.
  • For roll forging process, dilute at a ratio of 20–30.
  • For special process requirements, it can be used directly without dilution.
  • To ensure coating effect it is recommended to use an automatic or manual graphite emulsion spray gun for spraying, rather than manual application. Manual application not only results in uneven coating, affecting lubrication and demolding effects, but also leads to waste of graphite emulsion.
The forging graphite emulsion is poured into the equipment.
Conductive Graphite Emulsion

Before use, stir the conductive graphite emulsion evenly and then it can be used directly. If you feel high viscosity when using, you can add pure water to adjust to an appropriate viscosity. Conductive graphite emulsion has a good coating performance. Before coating, keep the surface clean, especially free from oil stains. The places with oil stains may not be coated. After coating, it dries quickly and forms a film at a temperature of 80–100 °C.

The cable cross section after the conductive graphite emulsion forming a coating film

After using the graphite emulsion, thoroughly rinse the residual graphite emulsion in the spray gun, pipeline and nozzle, to avoid the graphite emulsion from precipitating and clogging the pipeline. When using the spray gun again, check if the gun is unobstructed or not, and sake the graphite emulsion evenly, to prevent it from precipitating.It should be noted that the graphite emulsion shall be well sealed and stored at room temperature, and shall not exposure to the sun. In the winter, especially pay attention to keep it warm, to prevent freezing.