CERAM? Corrosion Protection Proves Superior
for Submersible Pumps and Impellers

The life of submersible pumps and impellers can be dramatically reduced by the physical damage caused by corrosion. The corrosion of pumps and impellers used in the movement of wastewater (i.e., lift stations) is typically caused by the effects of hydrogen sulfide (H2S)?often found in sewage?as well as by the action of many other potent corrosives that can be present in various submersible pump applications. In the past, coal-tar and asphalt type coatings have been used to slow these negative effects with only limited success.

However, an advanced coating developed by WILO EMU has proven to be extraordinarily effective in preventing virtually all types of corrosion. It has also proved to be superior to conventional coatings in abrasive conditions. This coating, known as CERAM, combines ceramics and polymers?which are applied using precision airless spraying technology.

CERAM was developed in 1997 by WILO EMU and has proven itself superior to conventional coatings in side-by-side salt spray and sandblasting tests as well as in years of use in actual applications, worldwide.

CERAM coatings are available in four thicknesses, C0, C1,C2 and C3. All CERAM coatings are non-porous and have an adhesion level of 15 Newtons per-square-inch. (This compares to conventional coatings that have adhesion levels in the range of 2 Newtons per-square-inch.)

In addition to superior corrosion prevention, CERAM provides an increase in efficiency due to a reduction in surface roughness and?because it is solvent-free?CERAM coatings are environmentally friendly.

WILO EMU USA LLC, headquartered in Thomasville, Georgia, provides heavy-duty municipal and industrial pumps specifically designed for water and sewage applications, including pumps for sludge, tertiary waste, and potable water. The company is part of the WILO Group, which is one of the world?s leading pump manufacturers.

CERAM? is a registered trademark of EMU Unterwasserpumpen GmbH