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In the production process of using alkaline zinc plating brightener, what is the role of filtering the plating solution?

2022-01-13

    In the production process of using alkaline zinc plating brightener, we often see that the galvanizing tank is followed by several filters to filter the plating solution. Have you ever wondered, what is the effect of filtering alkaline zinc plating solution?

    Bigolly Technology has made an analysis based on the field experience and the characteristics of the product alkaline zinc plating brightener BZ-515, The filtration of the plating solution mainly has the following two functions:


    1. Remove impurities in the plating solution. Various harmful impurities will inevitably be generated and accumulated in the plating solution. When it exceeds the allowable value, it will bring various faults. Carbonate radicals are bound to be produced in alkaline zinc baths, which are harmful when too much.In the alkaline zinc galvanizing solution, when the solution temperature is low, the excess carbonate radicals are saturated and crystallized into sodium carbonate crystals, which can be removed after filtration;The copper impurities and lead impurities in the plating solution are added with zinc powder to replace the precipitation;In addition, organic impurities can be adsorbed and precipitated by adding activated carbon, and then removed by filtration.

    2. Reduce bath failures and improve coating quality.Even if the suspended solid particles in the alkali-zinc plating solution reach the cathode surface through diffusion, convection, etc. to co-deposit with the coating layer or adhere to the coating surface, there will be many failures, resulting in rework and even workpiece scrapping.Various large mechanical particles cause coating burrs and roughness and must be reworked. Any mechanical impurities that are suspended or coarse (introduced in many ways) can only be removed by careful filtration of the bath.

    Therefore, in the production process of using alkaline zinc plating brightener, it is necessary to circulate and filter the plating solution, which can ensure the cleanness of the plating solution, effectively reduce failures, reduce rework, and improve production quality.If you are interested in alkaline zinc plating brightener, please contact Bigolly customer service to get free samples and detailed technical information!

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