Cu-Zn-Sn ternary alloy cyanide-free imitation gold plating solution and use method thereof
A cu-zn-sn, ternary alloy technology, applied in the field of cyanide-free gold imitation electroplating, can solve the problems of unsatisfactory appearance and luster of imitation gold plating, endangering the health of operators, narrow range of process parameters, etc., and improving the appearance and luster. , Wide range of process parameters, good appearance and color
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[0022] Example 1: Copper sulfate: 50g / L; zinc sulfate: 13g / L; stannous sulfate: 7g / L; sulfuric acid: 5ml / L; potassium pyrophosphate: 270g / L; ethylenediamine: 55ml / L; citric acid Potassium: 18g / L; Nitrilotriacetic acid: 25g / L; Potassium hydroxide: 15g / L;
[0023] The process conditions of the ternary alloy non-cyanide gold imitation plating solution are: pH: 8.0, temperature: room temperature, cathode current density: 2.0A / dm 2 , Plating time: 60s.
[0024] The appearance of the cyanide-free imitation gold plating layer obtained in Example 1 is golden yellow and has no structural defects; the deep plating ability of the plating solution is 82%, the current efficiency is 83.5%, and the conductivity is 0.0462Ω / m; Soaking in sweat for 3 hours does not change color; the surface has high flatness and low porosity; the interface with the bright nickel layer is firmly bonded without peeling, peeling or peeling; the batch production stability is high; it can be used as a decoration that loo...
Example Embodiment
[0025] Example 2: Copper sulfate: 30g / L; zinc sulfate: 15g / L; stannous sulfate: 6g / L; sulfuric acid: 4ml / L; potassium pyrophosphate: 250g / L; ethylenediamine: 50ml / L; citric acid Potassium: 18g / L; Nitrilotriacetic acid: 20g / L; Potassium hydroxide: 15g / L
[0026] The process conditions of ternary alloy non-cyanide gold imitation plating solution are: pH value: 9.0, temperature: room temperature, cathode current density: 2.0A / dm 2 , Plating time: 60s.
[0027] The appearance of the cyanide-free imitation gold plating layer obtained in Example 2 is light yellow and has no structural defects; the deep plating capacity of the plating solution is 81%, the current efficiency is 82.8%, and the electrical conductivity is 0.0464Ω / m; Soaking in sweat for 3 hours does not change color; the surface has high flatness and low porosity; the interface with the bright nickel layer is firmly bonded without peeling, peeling and peeling; the batch production stability is high; it can be used as a decora...
Example Embodiment
[0028] Example 3: Copper sulfate: 35g / L; zinc sulfate: 12g / L; stannous sulfate: 5g / L; sulfuric acid: 3ml / L; potassium pyrophosphate: 260g / L; ethylenediamine: 60ml / L; citric acid Potassium: 18g / L; nitrilotriacetic acid: 22g / L; potassium hydroxide: 20g / L.
[0029] The process conditions of the ternary alloy non-cyanide gold imitation plating solution are: pH value: 10, temperature: room temperature, cathode current density: 2.5A / dm 2 , Plating time: 90s.
[0030] The appearance of the cyanide-free imitation gold plating layer obtained in Example 3 is golden red without structural defects; the deep plating capacity of the plating solution is 83.5%, the current efficiency is 83.2%, and the electrical conductivity is 0.0459Ω / m; Soaking in sweat for 3 hours does not change color; the surface has high flatness and low porosity; the interface with the bright nickel layer is firmly bonded without peeling, peeling or peeling; the batch production stability is high; it can be used as a decora...
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