Non-cyanide alkaline silver plating method
An alkaline and modified technology, which is applied in the field of cyanide-free alkaline silver plating, can solve the problems of uneven coating thickness, air flow, scars, and imperfect coating, etc., and achieve good coating adhesion, smooth surface, and improved surface Effects of Gloss and Stability
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[0023] A cyanide-free alkaline silver plating method, the process is as follows:
[0024] Silver 10~12g / L
[0025] Sodium hydroxide 130~145g / L
[0026] Regulator 25~30ml / L
[0027] Cylinder agent 5~8ml / L
[0028] Brightener 1~3ml / L
[0029] Wetting agent 0.1~0.3ml / L
[0030] Temperature 20~30℃
[0031] Cathode current density 2.0~3.5A / dm2
[0032] Anode current density 1.0~2.0A / dm2
[0033] filter continuous
[0034] stir the air, the cathode moves
[0035] Wherein, the brightener is prepared from polyethylene imine, imidazole propoxy condensate, nitrogen heterocyclic derivatives, modified aromatic aldehyde compounds, epichlorohydrin and water.
[0036] The process will be added in the future: brightener 150-250ml / KAH, positioning agent 50-70ml / KAH, regulator 5L / 25kg sodium hydroxide.
[0037] The brightener is prepared by the following steps: 10-20 parts of polyethyleneimine, 15-25 parts of imidazole propoxy condensate, 25-35 parts of nitrogen heterocyclic derivativ...
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