Electroplating encyclopedia

Influence of temperature on plating solution in the production process of acid tin plating brightener


    In the production process of using acid tin plating brightener, it is very important to control the temperature of the plating solution. Do you know what effect the temperature has on the plating solution?

    Bigolly Technology made an analysis based on the field experience and the characteristics of the product's acid tin plating brightener Sn-807,The temperature of the plating solution is generally controlled below 25 °C, the temperature operating range is relatively narrow, and the rack plating production should be maintained between 10 and 20 °C.

    In the production of barrel plating, because the workpiece in the drum is in dynamic contact and has contact resistance, resistance heat will be generated, and the temperature of the plating solution in the drum is about 10 °C higher than that outside the drum.Therefore, sometimes the temperature of the plating solution is within the process range during barrel plating, but the produced workpiece will be foggy.Therefore, during barrel plating, the temperature of the plating solution is controlled to be lower, and it should be controlled at 8~15 °C as much as possible.

    When the temperature of the bath is too low, the current density of the cathode will decrease, the deposition rate of the coating will be slow, and the coating will be easily scorched and fogged.When the temperature is high, Sn2+ is easily oxidized to Sn4+, and the precipitates of the plating solution increase, resulting in rough plating.When the temperature of the plating solution is too high and exceeds the cloud point of the tin-plating brightener, the main brightener will precipitate out, causing the coating to lose its luster or even no coating.At this time, the decomposition of tin-plating brightener is accelerated, the consumption increases, and the bright area becomes narrower,the uniformity of the coating is poor, and the color becomes dark and mottled in severe cases, which affects the quality and weldability of the coating.

    Therefore, when we use the acid tin plating brightener, we should strictly control the temperature of the plating solution to ensure the stable production.If you are interested in acid tin plating brightener, please contact Bigolly customer service to get free samples and detailed technical information!

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