How to protect the surface of the water pump?

As is known to all, submersible pump is a kind of general machinery and equipment, its application in various fields of national economy is very extensive, the used water pump knows, use a long time, the water pump of the pump casing and pump wheel surface due to rust, corrosion, abrasion and cavitation erosion damage and become bumpy, friction coefficient increases gradually, so as to cause a decline in the efficiency of pump, power consumption increases, will shorten the service life of pump.
Encountered such a situation how to deal with? At present, the corrosion resistant ability of the pump, reduce the friction coefficient, and increase the service life of the pump and energy saving, can make use of organic polymer materials to protect the surface of pump flow channel to solve this problem.