CuNi

Copper-nickel (CuNi) is a binary alloy combining copper's excellent electrical and thermal conductivity with nickel's corrosion resistance and strength, creating a material well-suited to marine and corrosive environments. It is widely used in seawater cooling systems, naval applications, and desalination plants where resistance to corrosion, biofouling, and erosion-corrosion is critical. Engineers favor CuNi over pure copper in these settings because the nickel addition dramatically improves durability in aggressive aqueous environments while maintaining good workability and moderate cost compared to more exotic corrosion-resistant alloys.