Why the pogo pin need to gold plating ?

Electroplating is a process of plating a thin layer of other metals or alloys on the metal surface using the principle of Electroplating. It's a process of attaching a layer of metal film to the surface of metal or other materials by Electroplating.

Pogo PIN surface electroplating has a functional and decorative role, function: prevent metal oxidation (such as rust), improve wear resistance, electrical conductivity, corrosion resistance; Decorative: increase the surface color, enhance the appearance and so on.

Pogo pin gold coating has a golden appearance, good chemical stability, color resistance, electrical conductivity, corrosion resistance and oxidation resistance, and good weldability, low contact resistance, good hot-pressing bonding performance, making electrogold plating coating can be used as a decorative coating, but also can be used as a functional, protective coating.

In the electroplating of Pogo PIN connector, because of the high electrical performance requirements of the contact, the plating process obviously plays an important role in the electroplating of Pogo Pin connector. At present, except for some Pogo pin connectors using selective gold plating process, a large number of pinhole parts are still using roll plating and vibration plating. In recent years, the size of the connector is becoming smaller and smaller, and the quality of gold-plated pinhole parts is becoming more and more important. Users have higher and higher requirements for quality, and some users are worried about the appearance quality of the connector. Gold layers, even to a critical degree. In order to ensure the quality of connector gold plating, these common quality problems are always the key to improve the quality of connector gold plating.

1. The color of the gold layer is abnormal

The gold plating color of Pogo PIN connector is not consistent with the normal gold color, or the gold color of different parts in the same matching product is different.

2. Influence of impurities of raw materials

When the chemical materials added to the plating solution introduce impurities beyond the tolerance of the plating solution, the color and brightness of the gold layer will be affected very quickly. If it is the effect of organic impurities, there will be dark and flower phenomenon in the cash layer. The position of dark and flower is not fixed in the Hall slot test piece. If metal impurities interfere, the effective range of current density will be narrowed. Hall tank test shows that the current density of the test piece is not bright at the low end or the high-end plating is not bright at the low end. Reflected on the plated part is the coating red or even black, the color change in the hole is more obvious.

3, the current density is too large

Because the total area of the plating trough parts is incorrectly calculated and its value is greater than the actual surface area, the gold plating current is too large, or the amplitude is too small when the vibration electroplating is used, so that all or part of the gold plating in the trough is rough crystallization, and the gold layer is red visually.