The invention discloses a Cu-Zn-Sn
ternary alloy cyanide-free
imitation gold plating solution and a use method thereof. In the plating solution,
copper sulfate,
zinc sulfate and
stannous sulfate are used as main salts,
potassium pyrophosphate is used as a main complexing agent,
ethylene diamine,
potassium citrate and
nitrilotriacetic acid are used as auxiliary complexing agents,
sulfuric acid is used as an
antioxidant and an anti-
hydrolysis agent for stannous ions, and
potassium hydroxide is used as a
regulator for regulating the pH value of the plating solution. The operating conditions are as follows: the
cathode current density is 1.0-3.0A / dm2, the pH value is 8.0-10.0, the temperature of the plating solution is
room temperature, the plating time is 60-90s, the mechanical stirring or
cathode movement is adopted, the
anode material is 316L stainless steel, and the plating process is carried out on the substrate of a plating bright
nickel layer. The invention has simple formula of the plating solution, easy control, wide process parameter range, fine
crystal, good appearance color, stable plating solution, long service life, strong uniformly plating capacity and covering capacity, and high stability in
batch production. The technology can replace the
cyanide imitation gold plating process to be used as the plating process for imitating 9K, 18K or 24K gold on surfaces of decorative articles such as jewelry, clocks, handicraft articles and the like.