Environment-friendly cyanide-free alkaline galvanizing electroplating liquid and galvanizing technology

A cyanide-free alkaline galvanizing and electroplating solution technology, applied in the direction of electrolysis, electrolysis components, cells, etc., can solve the problems of uneven coating thickness, imperfect coating, air flow, scars, etc., and achieve good coating adhesion and improve Surface gloss and stability, surface leveling effect

Active Publication Date: 2015-11-18
广东比格莱科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These intermediates individually or in combination have a certain brightness-enhancing effect, but they are not perfect for the coating. Only the main light agent is added to the base liquid. Although the brightness of the coating can be greatly displayed, it cannot fully Dissolve into the bulk plating solution and evenly absorb and wet the metal / solution interface, resulting in inevitable airflow and scars on the metal surface, especially in the high current area, and even foggy and missing plating in the low current area
The crystal grains are large, the thickness of the coating is extremely uneven, and the brittleness is relatively large

Method used

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  • Environment-friendly cyanide-free alkaline galvanizing electroplating liquid and galvanizing technology

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Embodiment 1

[0040] An environment-friendly cyanide-free alkaline galvanizing electroplating solution provided by the invention, said cyanide-free alkaline galvanizing electroplating solution is composed of the following components:

[0041] Zinc 10g / L

[0042] Sodium hydroxide 130g / L

[0043] Regulator 25ml / L

[0044] Cylinder opening agent 6ml / L

[0045] Brightener 1ml / L

[0046] Wetting agent 0.1ml / L

[0047] Wherein, the brightener is prepared by the following method: 10 parts of polyethyleneimine, 15 parts of imidazole propoxy condensate, 25 parts of nitrogen heterocyclic derivatives, 13 parts of modified aromatic aldehyde compounds and 400 parts of water Add it into the reactor and raise the temperature to 45°C; add 70 parts of epichlorohydrin into the dropping funnel, slowly drop it into the reactor and stir the reaction, the reaction temperature does not exceed 45°C, and the dropping time is 3~5h; after the steps S2 After the epichlorohydrin is added dropwise, the temperature ...

Embodiment 2

[0050] An environment-friendly cyanide-free alkaline galvanizing electroplating solution provided by the invention, said cyanide-free alkaline galvanizing electroplating solution is composed of the following components:

[0051] Zinc 11g / L

[0052] Sodium hydroxide 140g / L

[0053] Regulator 27ml / L

[0054] Cylinder opening agent 7ml / L

[0055] Brightener 2ml / L

[0056] Wetting agent 0.2ml / L

[0057]Wherein, the brightener is prepared by the following method: 15 parts of polyethyleneimine, 20 parts of imidazole propoxy condensate, 30 parts of nitrogen heterocyclic derivatives, 18 parts of modified aromatic aldehyde compounds and 450 parts of water Add it into the reactor and raise the temperature to 45°C; add 75 parts of epichlorohydrin into the dropping funnel, slowly drop it into the reactor and stir the reaction, the reaction temperature does not exceed 45°C, and the dropping time is 3~5h; after the steps S2 After the epichlorohydrin is added dropwise, the temperature o...

Embodiment 3

[0060] An environment-friendly cyanide-free alkaline galvanizing electroplating solution provided by the invention, said cyanide-free alkaline galvanizing electroplating solution is composed of the following components:

[0061] Zinc 12g / L

[0062] Sodium hydroxide 145g / L

[0063] Regulator 30ml / L

[0064] Cylinder opening agent 8ml / L

[0065] Brightener 3ml / L

[0066] Wetting agent 0.3ml / L

[0067] Wherein, the brightener is prepared by the following method: 20 parts of polyethyleneimine, 25 parts of imidazole propoxy condensate, 35 parts of nitrogen heterocyclic derivatives, 13~23 parts of modified aromatic aldehyde compounds and 500 parts Add one part of water into the reactor and raise the temperature to 45°C; add 80 parts of epichlorohydrin into the dropping funnel, slowly drop it into the reactor and stir for reaction, the reaction temperature does not exceed 45°C, and the dropping time is 3~5h; After the epichlorohydrin is added dropwise in step S2, the temperature...

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Abstract

The invention relates to the technical field of electroplating, and discloses environment-friendly cyanide-free alkaline galvanizing electroplating liquid and a galvanizing technology. One liter of the cyanide-free alkaline galvanizing electroplating liquid comprises 10 g to 12 g of zinc, 130 g to 145 g of sodium hydroxide, 25 ml to 30 ml of a 51011 regulator, 6 ml to 8 ml of a 51012 preparing beginning agent, 1 ml to 3 ml of a 51015 brightener and 0.1 ml to 0.3 ml of a 51016 wetting agent. The brightener is prepared by polymine, imidazole propoxy condensation compounds, n-heterocyclic derivatives, modified aromatic aldehyde compounds, epoxy chloropropane and water. By means of the environment-friendly cyanide-free alkaline galvanizing electroplating liquid and the galvanizing technology, the brightness of a zinc coating is improved, the thickness can be 30 micrometers, fragility is avoided, and therefore the dispersing capacity and the covering capacity of the electroplating liquid are higher than the dispersing capacity and the covering capacity of traditional alkaline galvanizing brighteners.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to an environment-friendly cyanide-free alkaline galvanizing electroplating solution and a galvanizing process. Background technique [0002] For a long time in the past, the cyanide galvanizing process has been widely used because of the good stability of the cyanide plating solution, strong throwing ability, fine coating, and good corrosion resistance. However, due to the severe hydrogen evolution in the cyanide galvanizing process, the galvanized layer is very brittle, and the cyanide galvanizing solution is highly toxic, the wastewater treatment is difficult, and the air and groundwater are seriously polluted. Galvanizing and weak acid galvanizing processes are gradually developed and used in industrial electroplating to replace cyanide galvanizing. Compared with the cyanide galvanizing process, the destructive power of the alkaline galvanizing process to the environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22C25D21/10
Inventor 陈楷城
Owner 广东比格莱科技有限公司
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