CuNi (Copper-Nickel) is an alloy made primarily of copper and nickel, with small amounts of other elements like iron and manganese. This alloy is known for its excellent corrosion resistance, particularly in marine environments, as well as its good strength and formability. CuNi is commonly used in applications such as marine hardware, heat exchangers, desalination plants, and various industrial equipment exposed to harsh conditions. Its ability to resist corrosion in seawater, combined with its durability and thermal conductivity, makes it a preferred choice for a wide range of applications in industries like shipbuilding, oil and gas, and aerospace.