External nickelous sulfate plating liquid circulating purifying device

Abstract

The invention is an external nickel sulfate plating solution circulating purifier, comprising pre-reaction region, static flow guide settling region, buffer region, microfilter, etc, able to effectively remove ions of Cu, Fe, Zn, Pb, Cr, and other impurity metallic ions and aged colloids from the plating solution, and simultaneously not losing main nickel sulfate and additive, and after purified, the impurity content is less than 0.01%. And it adopts external circulating purification process, therefore able to implement continuous production and high-quality plating and able to be widely applied to plating solution purification, nickel sulfate production and purification, etc, in plating industry.

Description

Technical field [0001] The invention relates to an external nickel sulfate plating liquid circulation and purification device, which belongs to the chemical environmental protection category, in particular to a technology capable of effectively removing impurities in the nickel sulfate plating liquid and making them recyclable. Background technique [0002] The traditional electroplating process is generally Cu / Ni / Cr. Before nickel plating, a layer of copper is plated as the bottom layer to improve the bonding force between the surface coating and the metal substrate. Plating parts will inevitably bring some copper ions into the nickel plating process. At the same time, there will be iron, zinc, lead and other impurities introduced in water or additives. When accumulated to a certain extent, the plating layer will appear pinholes, blackening, etc. Affect the quality of plating. With the different levels of electroplating technology, the speed of accumulation is also slightl...

AI Technical Summary

Problems solved by technology

However, the removal efficiency is low, the electrolysis cycle is long, and continuous electroplating is not possible. Electroplating plants generally use the method of working during the day and electrolyzing at night, and scrap products often occur. The plating solution needs to be treated once every half a year on average; , chromium, lead, etc. have good adsorption performance but poor adsorption performance on nickel, which can effectively remove copper, chromium, lead, organic matter and other impurities in the plating solution

However, since activated carbon will adsorb additives (brighteners, wetting agents, etc.) at the same time, it must be replenished after filtration, otherwise it will affect the brightness of the plated parts and increase the stress of the coating, and the carbon fiber is easy to fall off, which will also cause certain damage to the plating solution. Negative impact

Images