Pogo pins are often used in mobile phones, communications, automobiles, aerospace and other electronic products to make precision connections. Because pogo pins are a very fine probe, the volume can be made very small, and it can reduce the connector's cost when used in precision connectors. Weight, save space, and beautify the appearance of the product.
In the electroplating of the pogo pin connector, the gold plating process occupies an important position in the electroplating of the pogo pin connector because of the higher requirements for electrical performance. Nowadays, except for the selective gold plating process for some strip spring pin connectors, barrel plating and vibration plating are still used for the gold plating in the holes of most of the other pinhole parts. In recent years, the size of the connector has become smaller and smaller, and the quality of the gold plating in the pinhole parts has become more prominent. Users have higher and higher requirements for the quality of the gold layer. Some users are also very concerned about the appearance quality of the gold layer. Picky.
1. The color of the gold layer is abnormal
The color of the gold-plated layer of the pogo pin connector is different from the normal gold layer, or the color of the gold layer of different parts in the same accessory product is different.
2. Impact of raw material impurities
The impurity of the chemical materials added to the plating solution will quickly affect the color and brightness of the gold layer after it exceeds the tolerance of the gold plating solution. If there are organic impurities, the gold layer will be darkened and bloomed. The Haul slot test piece is not fixed. If metal impurities interfere, the effective range of current density will be narrowed. The Haul tank test shows that the low end of the current density of the test piece is not bright or the high end is not bright and the low end is not coated. It is reflected on the plated parts that the plating layer is reddish or even black, and the color changes in the holes are obvious.
3. Excessive current density
Because the total area of the plating tank parts is calculated incorrectly, its value is larger than the actual surface area, so that the gold plating current is too large, or its amplitude is too small when vibration electroplating is selected, so that all or part of the plating gold plating in the tank is crystallized coarsely. Depending on the gold layer redness.