colloidal graphite coating is a type of paint that is produced by dispersing fine graphite particles in a liquid carrier (usually water and alcohol), usually in the presence of a polymeric binder. The resulting evaporation of the liquid carrier enables the graphite particles to be in direct contact with the surface.
Various types of colloidal graphite are available on the market, including Aquadag and Bonderite 137. These products are designed to provide superior lubricating and release films for high-temperature applications.
Colloid graphite can be used to produce an electrically conductive coating for magnesium alloy micro-arc oxidation coated surfaces. It is an easy to apply conductive lacquer that adheres well to smooth surfaces and retains its effectiveness up to 300deg C.
Dry friction and wear morphology of the coatings was evaluated to understand the effects of graphite content on the wear resistance. The results showed that the friction coefficient of the coatings increased when the graphite content was low (20-40 wt%), and it became stable when the graphite content was high (60-100 wt%).
