1. The color of the gold layer is abnormal
The color of the gold-plated layer of the pogo pin connector is inconsistent with the normal color of the gold layer, or the color of the gold layer of different parts in the same accessory product is different. The reasons for this problem are:
2. Impact of gold-plated raw materials
When the impurity introduced by the chemical material added to the plating solution exceeds the tolerance of the gold plating solution, it will quickly affect the color and brightness of the gold layer. If it is affected by organic impurities, the gold layer will become dark and bloom. The location of the chip inspection is not fixed. If the interference of metal impurities, the effective range of current density will be narrowed. The Haul tank test shows that the current density of the test piece is not bright at the low end or the high end is not bright and the low end is not plated. Reflected on the plated parts, the plating layer is reddish or even black, and the color changes in the holes are more obvious.
3. The gold plating current density is too large
Due to the calculation error of the total area of the plating tank parts, the value is greater than the actual surface area, so that the gold plating current is too large, or the amplitude is too small when vibrating gold electroplating, so that all or part of the gold plating in the tank is crystallized rough, and the gold is visually observed. Redness of the layers.