The plunger and barrel of pogo pin are generally made of brass. Copper is a very active metal and will undergo an oxidation reaction when exposed to air. Therefore, pogo pin must undergo surface plating treatment. The more commonly used surface treatment is gold plating, and some require nickel plating, zinc plating, silver plating or platinum plating. But what problems does pogopin encounter during the gold plating process?
The gold plating process plays an obviously important role in the electroplating of pogopin. At present, except for some pogo pin strips that adopt selective electroplating gold plating process. The remaining gold plating in the holes of a large number of pinhole parts is still carried out by barrel plating and vibration plating. In recent years, the size of connectors has become increasingly smaller, and the quality of gold plating in the pinhole parts has become increasingly prominent. Users have increasingly higher quality requirements for gold layers. Some users are even very picky about the appearance and quality of the gold layer. In order to ensure the quality and bonding strength of the gold plating layer of the connector, these common quality problems are always the key to improving the quality of the gold plating of the connector. The causes of these quality problems will be analyzed one by one below.
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The color of the gold-plated layer of the pogo pinis abnormal.
The color of the gold-plated layer of the pogo pin is inconsistent with the color of the normal gold layer. Or the gold layer color of different parts in the same supporting product is different. This is one of the most common plating problems.
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The influence of impurities in gold-plated raw materials of pogo pin
When the impurities in the chemical materials added to the plating solution exceed the tolerance of the gold plating solution, they 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 blooming. If metal impurities interfere, the effective range of current density will be narrowed.
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The gold-plated current density of the pogo pinis too large
Due to an error in calculating the total area of the plating bath parts, the value is greater than the actual surface area, causing the gold plating current to be too large. Or when vibrating gold plating is used, the amplitude is too small, so that all or part of the gold plating in the tank has rough crystallization, and the gold layer turns red by visual inspection.
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