The galvanic corrosion behavior of a rotating zinc cylinder coupled to a carbon steel cylinder in saline water was studied by the loss in weight technique. The variables studied were: water salinity, cylinder rotation speed, zinc/steel area ratio and the presence of a drag reducing polymer. The rate of zinc corrosion increased with decreasing the zinc/steel area ratio, and with increasing the cylinder rotation speed to an exponent of 0.25. Increasing the water salinity increases the rate of corrosion up to a maximum and then decreases with further increase of salinity. The addition of a drag reducing polymer (Polyox WSR-301) was found to reduce the rate of zinc corrosion. The maximum achieved reduction was 47%, depending on the Reynolds number and the polymer concentration. The economical benefits of using drag reducing polymers as corrosion inhibitors along with cathodic protection, using zinc in protecting steel structures handling turbulent sea water, e.g. coastal and ship cooling systems and desalination plants, are highlighted.