The Cylinder of Hunger Group is manufactured by applying special coating methods such as Ceraplate, CeraplatePlus, and UltraplatePlus, which are resistant to corrosion even in harsh environments such as exposure to moisture and seawater.

The basic coating for piston rods is the hard chrome plating, which is carried out by electroplating in single or multiple layers. Piston rods in length of up to 20 meters and diameters up to 1,500 mm are hard chrome plated in deep chrome bathes.

Piston rods, axles, valves and rolls may have a severely reduced life when installed in aggressive environments such as hydromechanical equipment, mining industry, paper mill and printing industry). In addition to conventional surface protection systems such as hardening, nitriding, hard chrome plating and nickel plating, Hunger has developed a coating technology which signifi cantly improves surface Protection against chemical attack and mechanical wear and tear: Ceraplate

The Ultraplate coating is especially developed for the offshore industry to withstand the extremely corrosive saltwater environment . This coating is suitable to protect carbon steel, working in submerged saltwater conditions or in the splash zone. Additional advantages of Ultraplate are an extremely high adhesion to the rod material, excellent wear properties as well as the possibility to repair partial damage of the coating locally.