Preparation of electroless Ni-P alloy coating with medium temperature and low phosphorus content

Low phosphorus electroless Ni-P alloy coating has many advantages over medium and high phosphorus electroless Ni-P alloy coatings because of its special microstructure and composition, which can meet more special performance requirements. In addition, reducing the plating temperature can reduce energy consumption. The preparation process of electroless Ni-P plating at medium temperature and low-P was studied by single factor and orthogonal experiment. The results show that electroless Ni-P alloy coatings with 4–6% P can be obtained at 60–80[Formula: see text]C and pH=5–6. The hardness, deposition rate and corrosion resistance of the coating were also evaluated.