Due to the fact that many plastic workpieces have a smooth and bright surface, some workpieces can obtain a uniform and bright chemical nickel coating without the use of brighteners when using alkaline chemical nickel plating solution for production; However, some workpieces may have a rough and dark coating after chemical nickel plating. Note that even after electroplating decorative chromium, the brightness of the workpieces may be poor, thereby reducing the appearance quality of the workpieces. So what is the reason for this phenomenon?
Based on on-site experience and the characteristics of the alkaline chemical nickel plating solution PL-7 and roughening additives PL-2, Bigley Technology analyzed that the phenomenon of rough and dark color of the chemical nickel coating is generally caused by excessive roughening of the workpiece.
In the actual production process, different plastic parts will use different ABS plastics, and different models of ABS plastic parts will have different roughing processes. Therefore, it is necessary to adjust the process parameters of the roughing solution in a timely manner during the production process, such as roughing time, roughing temperature, and the concentration of chromic acid and sulfuric acid.
In the actual production process, it is difficult to make such adjustments during automatic line production because the production of different workpieces is alternating. To solve this problem, two roughening grooves can be connected in series on the production line, which makes it easier to adjust the parameters of the roughening process and avoid excessive roughening of the workpiece. In addition, attention should be paid to some details during the production process, such as shortening the roughening time of the workpiece during the newly opened roughening solution, which can reduce the occurrence of faults and extend the service life of the roughening solution.
Therefore, in the production process of using alkaline chemical nickel plating solution for our plastic parts, it is necessary to check the coarsening process to avoid rough and dark color of the chemical nickel coating on the parts, reduce the occurrence of faults, and effectively improve production efficiency. If you are interested in chemical nickel plating solution, please contact Bigley customer service to obtain free samples and detailed technical information!
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