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Analysis of the problem of gold-plated anomaly of POGOPIN connector
Source: | Author:nancy190302 | Publish time: 2019-03-29 | 566 Views | Share:
The plunger and barrel of the POGO PIN connector are generally made of brass C3604, and brass is a very active metal. When exposed to air, it reacts with oxygen in the air and the surface oxidizes. Therefore, spring pin connector must be surface-plated......
The plunger and barrel of the POGO PIN connector are generally made of brass C3604, and brass is a very active metal. When exposed to air, it reacts with oxygen in the air and the surface oxidizes. Therefore, spring pin connector must be surface-plated; the more common ones are gold-plated, nickel-plated, galvanized, silver-plated or plated. Today we will talk about some of the problems that pogo pins will encounter during the gold plating process.

The gold plating process plays an important role in pogopin plating. At present, except for some of the material spring pin, which are selectively electroplated with gold, the gold plating in the holes of a large number of pinhole parts is still performed by barrel plating and vibration plating. . In recent years, the size of the connector has become more and more miniaturized, and the quality of the gold plating in the hole of the pinhole component has become increasingly prominent. The quality requirements of the user for the gold layer are also getting higher and higher, and the appearance quality of the gold layer by some users. Even reaching a very critical degree, in order to ensure the quality of the gold-plated layer of the connector, these common quality problems always improve the quality of the gold-plated quality of the connector. The reasons for these quality problems are discussed one by one.

1. The color of the pogo pin gold plating layer is not normal.
The color of the gold-plated layer of the spring pin is inconsistent with the color of the normal gold layer, or the color of the gold layer of different parts in the same accessory product is different. This is one of the most common problems with electroplating.

2. Influence of gold-plated raw material impurities of pogo pins
When the chemical material added to the plating solution exceeds the tolerance of the gold plating solution, it will quickly affect the color and brightness of the gold layer. If it is affected by organic impurities, the gold layer will appear dark and faint. The film is dark and the position of the hair is not fixed. If the metal impurities interfere, the effective range of current density will be narrowed. The Haoer cell 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 and the low end is not plated. It is reflected that the plating is red or even Blackening, the color change in the hole is more obvious.

3. The gold plating current density of the spring pin is too large.
Since the total area of the plated parts is incorrectly calculated, the value is larger than the actual surface area, so that the amount of gold plating current is too large, or the amplitude of the gold plating is too small when the gold plating is used, so that all or part of the gold plating in the groove is crystallized, and the gold is visually observed. The layer is red.