The Metallurgical Structure of Electroless Nickel Deposits: Effect on Coating Properties

摘要

A new phase diagram for elect roless nickel alloys includes two non-equilibrium phases. The effect of structure on physical properties is described, including internal stress, magnetic response, ductility, corrosion resistance, passivity, porosity, hardness, wear resistance and strength. In the as-deposited condition, electroless nickel coatings can contain crystalline, micro-crystalline and amorphous phases. The relative amounts of these phases depend upon the formulation of the plating bath and upon the composition of the resulting deposit. These factors also determine the properties of the coating.