| 摘要 |
PURPOSE:To form a good electroless plating film on the surface of a non-conductor, by using a metal salt including a nickel or cobalt salt, an ammonium salt and acetate, and a reducing agent containing borohidride, ammonia and acetate. CONSTITUTION:An aqueous solution containing about 0.05-0.2mol/l of a nickel salt, about 0.2-0.5mol/l of an ammonium salt and about 0.1-0.5mol/l of acetate and a reducing liquid comprising an aqueous solution containing about 0.01- 0.05mol/l of borohydride, about 5-30ml/l of aqueous ammonia and about 0.1- 0.5mol/l of acetate are simultaneously sprayed from separate nozzles to form an electroless nickel plating film, which has a thickness withstanding electrocasting, has excellent surface property free from surface defects such as a pinhole or crack and good close adhesiveness, to the surface of a non-conductor. |
