Tourist souvenir furnishing article
A technology for souvenirs and decorations, applied in the field of tourist souvenirs and decorations, to achieve the effects of easy control, stable process and low production cost
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Embodiment 1
[0026] A tourist souvenir ornament. The substrate of the ornament is 2# zinc alloy, which is produced by die-casting process; the outer surface of the substrate is sequentially provided with cyanide-free pre-plated copper coating, acid copper plating layer, semi-bright nickel plating layer, electroplating high Sulfur nickel coating, electroplating bright nickel coating and electroplating chromium coating; the thicknesses of the above coatings are 3-5 μm, 1-2 μm, 0.5-1 μm, 2-3 μm, 1-2 μm, 6-8 μm; wherein, each coating consists of the following Steps to form:
[0027] (1) Cyanide-free pre-plating of copper: the composition of the plating solution is copper pyrophosphate 80g / L, sodium pyrophosphate 150g / L, trisodium citrate 200g / L, potassium sodium tartrate 40g / L, HEDP15g / L, ethylenediamine 180g / L; ammonium bifluoride 5g / L; sodium fluoride 3g / L, lithium fluoride 6g / L; ammonia water to adjust the pH value to 9.5, the electroplating process is cathode current density: initial curre...
Embodiment 2
[0034] A tourist souvenir ornament. The substrate of the ornament is 2# zinc alloy, which is produced by die-casting process; the outer surface of the substrate is sequentially provided with cyanide-free pre-plated copper coating, acid copper plating layer, semi-bright nickel plating layer, electroplating high Sulfur nickel coating, electroplating bright nickel coating and electroplating chromium coating; the thicknesses of the above coatings are 3-5 μm, 1-2 μm, 0.5-1 μm, 2-3 μm, 1-2 μm, 6-8 μm; wherein, each coating consists of the following Steps to form:
[0035] (1) Cyanide-free pre-plating of copper: the composition of the plating solution is copper pyrophosphate 90g / L, sodium pyrophosphate 140g / L, trisodium citrate 220g / L, potassium sodium tartrate 36g / L, HEDP17g / L, ethylenediamine 160g / L; ammonium bifluoride 8g / L; sodium fluoride 2g / L, lithium fluoride 8g / L; ammonia water to adjust the pH value to 8.5, the electroplating process is cathodic current density: initial curr...
Embodiment 3
[0042] A tourist souvenir ornament. The substrate of the ornament is 2# zinc alloy, which is produced by die-casting process; the outer surface of the substrate is sequentially provided with cyanide-free pre-plated copper coating, acid copper plating layer, semi-bright nickel plating layer, electroplating high Sulfur nickel coating, electroplating bright nickel coating and electroplating chromium coating; the thicknesses of the above coatings are 3-5 μm, 1-2 μm, 0.5-1 μm, 2-3 μm, 1-2 μm, 6-8 μm; wherein, each coating consists of the following Steps to form:
[0043] (1) Cyanide-free copper pre-plating: the bath composition is copper pyrophosphate 85g / L, pyrophosphoric acid 145g / L, trisodium citrate 210g / L, potassium sodium tartrate 38g / L, HEDP16g / L, ethylenediamine 170g / L; ammonium bifluoride 6g / L; sodium fluoride 2.5g / L, lithium fluoride 7g / L; ammonia water to adjust the pH value to 9, the electroplating process is cathodic current density: initial current density 5A / dm 2 , ...
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