Analysis of Plating Problems of Connectors.spring loaded pogo pins

　　In connector electroplating, due to the high electrical performance requirements of the contact pair, the gold plating process occupies an obvious important position in the connector electroplating. At present, except for some strip connectors that use selective gold plating process, the rest of a large number of pins The gold plating in the holes of the hole parts is still carried out by barrel plating and vibration plating. In recent years, the size of the connectors has become more and more miniaturized, and the quality problems of the gold plating in the holes of the pinhole parts have become increasingly prominent. The quality requirements of the connector are also getting higher and higher, and some users are even very picky about the appearance quality of the gold layer. In order to ensure the quality of the connector's gold-plated layer, these common quality problems are always the key to improving the quality of the connector's gold-plated layer. The reasons for these quality problems are discussed below.

　　1. The color of the gold layer is abnormal

　　The color of the gold-plated layer of the connector is inconsistent with the normal color of the gold layer, or the color of the gold layer of different parts in the same matching product is different. The reasons for this problem are:

　　2. Influence of impurities in gold-plated raw materials

　　When the impurities brought in by the chemical materials added to the plating solution exceed the tolerance level of the gold plating solution, the color and brightness of the gold layer will soon be affected. If it is affected by organic impurities, the gold layer will appear dark and flowery. The position of the dark and flowered pieces is not fixed. If the metal impurities interfere, the effective range of the current density will be narrowed. .Reflected to the plated parts, the coating is red or even black, and the color change in the hole is obvious.

　　3. The current density of gold plating is too large

　　Due to the incorrect calculation of the total area of the plating tank parts, the value is larger than the actual surface area, the gold plating current is too large, or the amplitude of the gold plating is too small when the vibration plating is used, so that all or part of the gold plating in the tank has rough crystals, and the gold plating is visually impaired. layer redness.

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