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Post Processing

POCO materials can be purified to less than 5 ppm, densified to reduce open porosity by as much as 80%, or impregnated with resins, oxidation inhibitors or metals. Surface treatments and coatings are available to provide a sealed surface, to improve wear characteristics or to reduce particles.


Some of these additional processes are applied to bulk materials and others are recommended after final machining.



Bulk Materials

All POCO grades are available as bulk product, but post processing is normally done on 5-micron grain size materials.

Machined Parts

Surface treatments such as pyrolytic coatings should only be done on finished, machined parts. Machining after treatment will expose the graphite substrate.