What are the causes of quality problems with straight-through connectors?

I. What are the causes of the quality problems of straight-through connectors?1. Impurities in the raw materials affect the color and the brightness of the gold coating when the impurities in the chemical raw materials are added to the plating solution plating solution tolerance exceeds. If the effect of organic impurities darken and gold coating bloom, Hall groove specimen is not fixed in the position of the darkening and blooming. The effective range of current density will become narrow. The results show that the current density of the sample does not shine at the low end or the high end of the plating at the low end does not shine.2. The current density of the gold plating is too high because the total area of the plating tank part of the calculation of the error, and its value is greater than the actual surface area, so that the gold plating current is too large, or the amplitude of vibration plating is too small, so that all or part of the plating of the gold plating solution in the crystallization of the coarse, and the vision of the gold layer is red.3. Too many impurities in the plating solution build-up is bound to be if the Aging gold plating solution used for too long leads to abnormal color of the gold layer. 4. In order to improve the hardness of the straight-through connector and wear resistance of the plug-in, usually using the gold plating process. Gold-cobalt and gold-nickel alloys are used more and more frequently. When the content in the cobalt-nickel plating solution changes, the color of the gold coating changes. If the content of cobalt in the plating solution is too high, the gold plating process will be used. The color of the layer will be red; if the nickel content in the bath is too high. High metal color will become lighter; if this change in the bath and its supporting products in different parts of the bath is too large not plated bath the same, the same batch of products will be provided to the user of the phenomenon of the gold layer of different colors.5. When the thickness of the outer surface of the plated parts of the straight-through connector reaches or exceeds the specified thickness value inserted into the pin or Jack after the completion of the gold-plating process, on the soldering wire holes or Jack bore coating is very thin or even no gold layer.

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