Impervious graphite is a composite material made of 80 to 85% of synthetic graphite and 15 to 20% of phenolic resin depending on the selected graphite grade. It is used to manufacture corrosion-resistant process equipment such as heat exchangers, columns, or ejectors for the most corrosive applications.
The manufacturing process of impervious graphite includes two main steps. First synthetic graphite is manufactured. Then this material is impregnated with phenolic resin to make it impervious and enhance its mechanical characteristics.
Impervious graphite has noteworthy properties. It shows outstanding thermal conductivity and has a very low adhesion angle. It has high compression strength but limited tensile and flexural strengths.
Impervious graphite is corrosion-resistant against most common acids (e.g. hydrochloric acid, sulfuric acid, and hydrofluoric acid) and solvents. It has a limited resistance against oxidizing media (e.g. nitric acid) and bases (e.g. amines, potash and caustic soda).
GAB Neumann GmbH
Alemannenstrasse 29
79689 Maulburg
Germany
GAB Neumann GmbH | Alemannenstrasse 29 | D-79689 Maulburg | Phone +49 (7622) 6751 0 | Fax +49 (7622) 6751 20 | E-Mail info@gab-neumann.de | www.gab-neumann.com