Electroless nickel plating is a process of uniformly depositing a nickel-phosphorus alloy on a suitable basis metal. The source of electrical energy comes from within the plating solution. Aircraft use of electroless nickel plate has increased in recent years. Desirable properties, such as lubricity, high hardness, and good wear resistance, are described. When to select electroless nickel, specific aircraft applications, and undesirable properties of electroless nickel are also discussed.