What Materials Are Used For Marine Dry Coolers For Generator Sets On Ocean-Going Ships

Marine dry coolers for generator sets on ocean-going ships are built with corrosion resistance, mechanical strength, and long service life as top priorities.

Heat exchanger tubes:

Copper-nickel (Cu-Ni 90/10 or 70/30) for excellent seawater corrosion resistance

Stainless steel (AISI 316L) for high durability and low maintenance

Aluminum (in closed-loop freshwater systems)

Fins:

Aluminum fins (often epoxy-coated or hydrophilic-coated) for high heat transfer

Copper fins in heavy-duty or premium designs

Headers and manifolds:

Carbon steel with marine-grade coatings

Stainless steel (316L) for harsh offshore environments

Frame and casing:

Hot-dip galvanized steel

Marine-grade aluminum

Stainless steel for maximum corrosion protection

Fans and accessories:

Aluminum or composite fan blades

Stainless steel fasteners and hardware

Protective coatings:

Epoxy, polyurethane, or anti-salt spray coatings compliant with marine standards

These material combinations ensure reliable operation of generator set cooling systems under salt spray, high humidity, vibration, and continuous duty conditions typical of marine and offshore applications.

Summary Table: Typical Materials for Marine Dry Coolers