I have a 5hp end suction centrifugal pump with a 6" bronze impeller. The impeller has serious galvanic corrosion evident. This pump is part of a large decorative fountain. The pump draws water from a holding tank at the same level as the pump and pumps the water up approx. 12' to the fountain outlets. Water travels back to the tank from the overflows. We suspect electrolysis and wonder if placing sacrificial rods in the holding tank will prevent, or slow down at least, this corrosion. The possibility of corrosion from cavitation has been addressed. Stainless impellers are not available for this model. Thanks for any help.
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