Seawater’s corrosive behavior effects the material used to transport it. Many metals alloys cannot handle the destructive nature, so specific material must be used to provide greater resistance. Selecting the appropriate material can drastically extend the life of the component. Naval Bronze (C83600) is an excellent material choice when handling seawater as the medium.
Naval Bronze is a copper alloy comprised of 85% copper, 5% Tin, 5% Lead, 5% Zinc (85-5-5-5) and a trace of other alloys. The thermal conductivity is very high, which makes it a great option for contact cooling at low temperatures. Copper itself can be very porous, so Tin, Lead, and Zinc all aid in eliminating unwanted porosity issues. In addition, Tin gives the alloy a high resistance to corrosion and weakness. The higher tensile strength and resistance to cavitation make it an appropriate selection for seawater applications.
C83600 is suitable for industrial application including: bushings, frames, struts, gears, valve stems, cams, and hydraulic cylinder parts. At Hays Fluid Controls, we use the alloy for commercial marine seawater valve applications, which can included luxury yachts, cruise ships, and work boats.
If higher velocities or flow rates are needed for marine applications, 316SS is a great alternative. Naval Bronze and 316SS are both regarded as appropriate material alloys due to their physical material strength using seawater as a medium.
Choosing the correct valve is key to treating seawater systems as a whole. Many systems are chosen based on initial cost, which can require significant maintenance over the life of the valve if not frequently checked. More progressive companies will opt for a better material alloy which may have a higher cost, but will save on maintenance cost and will function reliably. At Hays Fluid Controls we choose Navy Bronze because it has the best of both worlds. The alloy has exceptional decay resistance and function properties in relation to its cost.