Environment-friendly trivalent chromium electroplating solution and environment-friendly trivalent chromium electroplating method thereof
A technology of trivalent chromium and electroplating solution, which is applied in the field of electroplating technology, can solve the problems of poor corrosion resistance of the coating, low coverage of the plating solution, and inability to meet the needs of industrial production, and achieve the effect of improving corrosion resistance and coverage
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[0026] Example 1
[0027] Electroplating solution composition:
[0028]
[0029] Electroplating method: take the nickel-plated sheet (standard brass sheet 100*70 mm with a nickel layer thickness of 8 microns), and conduct electroplating test in a 267ml Hou's bath. The conditions are: temperature 35°C, DC current 8 amperes, electroplating 2 Minutes, high-purity graphite (purity 99.99%) was used for the anode to obtain test piece A1.
[0030] Evaluation of electroplating effect: The range of the bright area on the observation test piece is 5×9.4 cm, and the current density range of the plating solution can be obtained, and then the coverage ability of the plating solution can be evaluated. Seal the parts not coated with chromium layer with varnish, and do a neutral salt spray test for 36 hours, and no corrosion of chromium layer was seen.
Example Embodiment
[0031] Example 2
[0032] Electroplating solution composition:
[0033]
[0034]
[0035] Electroplating method: take the nickel-plated sheet (standard brass sheet 100*70 mm with a nickel layer thickness of 8 microns), and conduct electroplating test in a 267ml Hou's bath. The conditions are: temperature 35°C, DC current 8 amperes, electroplating 2 Minutes, high-purity graphite (purity 99.99%) was used for the anode to obtain test piece A2.
[0036] Evaluation of electroplating effect: The range of the bright area on the observation test piece is 5×9.5 cm, and the current density range of the plating solution can be obtained, and then the coverage of the plating solution can be evaluated. Seal the unplated chromium layer with varnish, and do a neutral salt spray test for 32 hours. No corrosion of the chromium layer was seen.
Example Embodiment
[0037] Example 3
[0038] Electroplating solution composition:
[0039]
[0040] Electroplating method: take the nickel-plated sheet (standard brass sheet 100*70 mm with a nickel layer thickness of 8 microns), and conduct electroplating test in a 267ml Hou's bath. The conditions are: temperature 35°C, DC current 8 amperes, electroplating 2 Minutes, high-purity graphite (purity 99.99%) was used for the anode to obtain test piece A3.
[0041] Evaluation of electroplating effect: Observe that the bright area on the test piece is 5×9.1 cm, and the current density range of the plating solution can be obtained, and then the coverage of the plating solution can be evaluated. Seal the unplated chromium layer with varnish, and do a neutral salt spray test for 32 hours. No corrosion of the chromium layer was seen.
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