Ceramic is commonly used as a mating ring together with carbon-graphite opposite seal face in mechanical seal kits which in turn used in chemical pump applications.

Since Alumina exhibit high hardness, good abrasion resistance & good resistance to acid and mild alkaline solutions. This makes them suitable choice for chemical seal faces. They are used in corrosive environments like acids including Hydro fluoric acids, molten salt solutions, and mild to medium alkaline solutions.