-// Ni-W/Mo/Lanthanide mixed-rare earth metal electroless plating solution and plating method using the same

摘要

PURPOSE: Ni-W/Mo/Lanthanide mixed-rare earth metal electroless plating solution and a plating method using the same are provided. CONSTITUTION: The Ni-W/Mo/Lanthanide mixed-rare earth metal electroless plating solution contains, in 1 liter of distilled water, nickel sulfate 5 to 15g, sodium tungstate 20 to 35g, molybdenum 25 to 35g, Lanthanide mixed-rare earth metal 0.1 to 5g, sodium citrate 10 to 15g, sodium hypophosphate 5 to 10g and molybdenum ionic surfactant 0.7 to 2.0g/25cc, wherein the ionic surfactant is dioctyl phthalate+phthyl cellosolve; the diameter is molybdenum is 0.1 to 1.0 micrometer; the diameter of Lanthanide mixed-rare earth metal is 0.1 to 2.3 micrometer. The plating method using Ni-W/Mo/Lanthanide mixed-rare earth metal electroless plating solution includes the steps of completely dissolving nickel sulfate 5 to 15g, sodium tungstate 20 to 35g in 1 liter of distilled water; secondary dissolving sodium citrate 10 to 15g, sodium hypophosphate 5 to 10g in the distilled water; adding 25 to 35g of molybdenum with a particle size of 0.1 to 1.0 micrometer, 0.1 to 5g of Lanthanide mixed-rare earth metal with a particle size of 0.1 to 2.3 micrometer and 0.7 to 2.0g/25cc of molybdenum ionic surfactant in the distilled water; electroplating a specimen to be plated in a thickness of 7 to 10 micrometers at pH 9.0 to 9.8 at electroplating solution temperature of 85 to 90C; and heat treatment at 350 to 450C for about 30 min.