Electroless nickel plating (also called EN plating) is the process of depositing a coating of nickel phosphorous on a variety of substrates. Electroless Nickel plating is not dependent on an external electrical current as used in electroplating. Deposition is accomplished through the chemical reduction of nickel ions on a suitably prepared substrate with a catalytic surface utilizing the proper reducing agent. The reaction of the coating will remain as long as fresh solution is available at the surface interface. This will allow for a very uniform deposit with thicknesses that can exceed >.015 thick.
Electroless Nickel, Medium Phos
Electroless Nickel, medium phosphorous plating is used in situations that require a uniform and hard coating with a moderate resistance to corrosion and a bright finish.
Smooth and even coating, no matter the shape of the part, including recesses and holes
Plating volume and thickness is easily controlled
Heat treated deposits approach the hardness of hard chrome
Low coefficient of friction
Appealing look to parts due to bright deposit of nickel