Electroplating encyclopedia

When the alkaline zinc plating brightener is used for production, the impurities in the plating bath are generated in this way


    After we use alkaline zinc plating brightener to produce for a period of time, there will always be some useless things in the plating solution, even harmful, these things are impurities. So how are these impurities colored?

    Bigolly Technology has made an analysis based on the field experience and the characteristics of the alkaline zinc plating brightener BZ-515. In the alkaline zinc plating process, impurities are divided into organic impurities and metal impurities.

    1. Organic impurities. Alkaline zinc plating brightener is obtained by the reaction of organic amine or propylene oxide under certain temperature conditions. Not all of the reaction products will play a good role in the electroplating process, and some of them are useless or even harmful, These are organic decomposition products. The presence of these products will make the coating bubbles and uneven brightness. Therefore, we need to regularly purify the alkaline zinc plating bath in our daily production.

    2. Metal impurities. When configuring the alkaline zinc plating bath, impure chemical raw materials or foreign metal impurities (iron, copper, lead, etc.) brought in from the outside during the production process will affect the quality of the galvanized layer. However, the method of removing impurities is relatively simple. For example, iron is suspended in the plating solution in the form of hydroxide, and the part can be removed by low-current electrolysis. Most metal impurities can be precipitated after reduction with zinc powder, and then removed by filtration.

    In the production process, with the addition of the alkaline zinc plating brightener, the impurities in the plating solution are unavoidable, so it is necessary to remove impurities in the plating solution in daily production.If you are interested in alkaline zinc plating brightener, please contact Bigolly customer service for free samples and detailed technical information!

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