1. The color of the gold layer is abnormal
Because the color of the connector gold-plated layer is different from that of the ordinary gold-plated layer, or because the color of the gold-plated layer in different parts of the same backing product is different.
2. The influence of impurities in raw materials
The chemical substance added to the plating solution is doped with impurities. If it exceeds the allowable range of the plating solution, it will affect the color and brightness of the gold layer. If organic impurities are still present, the gold layer will darken. According to the experience of Hall element samples, the gray scale is not always the same. If metal impurities interfere, the effective range of current density will become smaller. The Hall element test shows that the lower end of the sample current density is dull, or the upper end is dull and the lower end cannot be electroplated. Therefore, it is reflected that the plating layer on the plated part is red or even black, and the color change in the hole is obvious.
3. The current density is too high.
Because there are errors in the calculation of the total area of each part of the plating tank, which is larger than the actual area, the plating current is too large. Another reason given by the thimble pogopin thimble manufacturer is that the vibration amplitude of the gold plating is too small, which makes the gold plating layer in the plating solution completely or Part of the crystal is rough, causing the gold layer to turn red.