In the process of using potassium chloride zinc plating additive, we sometimes find that the current density range becomes narrower. When the current is low, the deposition speed of the coating is slower, and when the current is high, the coating is prone to burning. What is the method to expand the current density?
Based on on-site experience and the characteristics of BZ-528, a potassium chloride zinc plating additive, Bigley Technology analyzed the following three methods to expand the current density range:
1. Control the concentration of zinc chloride in the plating solution. When the concentration of zinc chloride in the plating solution is low, although the depth ability is good, the deposition speed of the coating is slow, and the high current area of the coating is easy to burn; When the concentration of zinc chloride exceeds 90g/L, the current density range will expand, but the dispersion ability and depth ability of the plating solution will decrease. Therefore, during the production process, when the concentration of zinc chloride in the plating solution is controlled between 60-70g/L, the current density range is large, and the dispersion ability of the plating solution is good.
2. Control the concentration of boric acid in the plating solution. Boric acid plays a pH buffering role in the plating solution, which can refine the crystallization of the coating and expand the current density range. When the concentration of boric acid is low, the current range narrows, the brightness of the coating decreases, and the pH value is easy to rise, making the coating prone to roughness and burning. Therefore, in the actual production process, the concentration of boric acid should be maintained within the range of 25-30g/L, and can be maintained within the range of 30-35 in summer.
3. Adjust the additive content in the plating solution. The appropriate concentration of additives in the plating solution can effectively expand the current density range, improve the dispersion ability and depth ability of the plating solution. During the production process, there is often an imbalance of additives, and the concentration of additives in the plating solution can be adjusted regularly through Hull cell experiments. In addition, it is important to choose a high-quality potassium chloride zinc plating additive, such as Bingley's BZ-528, and use it correctly, adhering to the principle of frequent addition and minimal addition.
Therefore, in the process of using potassium chloride zinc plating additives, the current density range can be expanded through these three methods to improve production efficiency. If you are interested in potassium chloride zinc plating additives, please contact Bigley customer service for free samples and detailed technical information!
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