Anti Corrosion Polished Hydro Turbine Runner Water chemistry drives runner life. For seawater and high mineral waterways we polish the surfaces and select a corrosion resistant stainless steel grade to slow material loss. Technical Specifications Corrosion Resistance High Surface Treatment Polished Material Stainless Steel ZG06Cr13Ni4Mo Application Seawater and high mineral water Key Features Polished surfaces reduce corrosion and erosion Stainless steel suited to aggressive