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Analysis of the problem of abnormal gold plating of pogopin spring needle.Elastic contact company

source:Industry News    Popular:pogo pin for moilble phone     release time:2021-11-12 09:31:34     Article author:sznbone

Analysis of the problem of abnormal gold plating of pogopin spring needle.Elastic contact company(图1)

  The material of pogopin pogopin needle and needle tube is generally brass, and copper is a very active metal. It will react with oxygen in the air when exposed to the air, and the surface will oxidize. Therefore, pogopin spring needles must be surface electroplated; the more commonly used is generally gold-plated on the surface, and some require nickel-plating, zinc-plating, silver-plating or plating. Today we will talk about some of the problems that pogopin spring needles will encounter during the gilding process.

  The gold-plating process occupies an obvious important position in pogopin pogo pin electroplating. At present, except for some strip pogo pins using selective gold electroplating process, the gold plating in the hole of a large number of pinhole parts is still carried out 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 pinhole parts has become more and more prominent. Users have higher and higher requirements for the quality of the gold layer. Some users are concerned about the appearance quality of the gold layer. Even to a very critical level, 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 gold plating quality of the connector. The reasons for these quality problems will be discussed one by one.

  1. The color of the pogo pin gold-plated layer is abnormal

  The color of the gold plating layer of the pogo pin is inconsistent with the normal color of the 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 electroplating problems.

  2. The influence of the impurity of the gold-plated raw material of the pogo pin

  When the impurities introduced by the chemical materials added to the plating solution exceed 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 become dark and bloom. The location of the film check is not fixed. If metal impurities interfere, the effective range of the current density will be narrowed. The Haul tank test shows that the current density of the test piece is not bright at the low end or the high end is not bright and the low end is not plated. It is reflected that the plating layer on the plated parts is red or even Black, the color change in the hole is more obvious.

  3. The gold-plated current density of the pogo pin is too large

  Due to the calculation error of the total area of the plating tank parts, the value is greater than the actual surface area, so that the gold plating current is too large, or the amplitude is too small when vibrating gold electroplating, so that all or part of the gold plating in the tank is crystallized rough, and the gold is visually observed. Redness of the layers.


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