MiningMatters: The Role of Nickel in Desalination Plants As global demand for fresh water grows, desalination plants play an increasingly important role in converting seawater into potable water. However, the highly corrosive nature of seawater presents a significant engineering challenge. This is where nickel becomes indispensable. Nickel is a key component in stainless steels, duplex stainless steels and copper-nickel alloys used throughout desalination facilities. These materials offer exceptional resistance to corrosion, erosion and biofouling caused by prolonged exposure to seawater. Nickel-containing alloys are commonly used in heat exchangers, evaporator tubes, piping systems, pumps and valves, helping ensure operational reliability and longer service life. In thermal desalination processes such as Multi-Stage Flash (MSF) and Multi-Effect Distillation (MED), copper-nickel alloys have demonstrated excellent performance in handling seawater. In reverse osmosis plants, nickel-containing stainless steels provide the strength and corrosion resistance required for high-pressure environments. By improving durability and reducing maintenance requirements, nickel helps make large-scale freshwater production more efficient and sustainable.