What are the common problems when plating connectors?

In the connector plating, due to the contact has high electrical performance requirements, gold plating process in the connector plating occupies an obviously important position, at present, in addition to some of the strip connector with selective gold plating process, the rest of the pinhole bulk hole plating is still used in the holes of the gold plating of the roll plating and vibration plating to carry out.

-I. Connector plating what are the common problems? 1. Gold layer color is not normal connectors gold plating layer color and the normal color of the gold layer is not consistent, or with a supporting products in different parts of the gold layer color differences. 2. Plating the impact of impurities in the raw materials when added to the plating solution of the chemical materials into the impurities over the degree of tolerance of the gold plating solution will soon affect the color of the gold layer and the brightness of the color, if it is the impact of organic impurities will appear! Gold layer darkening and blooming phenomenon, Haoer trough test piece to check the darkening and blooming position is not fixed, if the metal impurities interfere will cause the current density effective range becomes narrow, Haoer trough test shows that is the low end of the current density of the test piece is not bright or high end of the plating is not bright, reflecting to the plated parts is plated with red or even black, the color of its holes in the color change is more obvious. 3. plating current density is too large due to the plating of parts of the tank of the total surface area calculation errors Its value is greater than the actual surface area, so that the amount of gold-plating current is too large, or the amplitude of the vibration electroplating is too small, so that all or part of the plated parts in the slot of the gold-plated layer of crystalline roughness, visual redness of the layer of gold. 4. aging of the plating liquid plating liquid is too long, the plating liquid impurities in the over-accumulation of the inevitable result of the color of the gold layer is not normal. 5. changes in the alloy content in the hard gold-plated in order to increase the hardness of the connectors and wear-resistant degree, the connectors gold-plated is generally red or even black. In order to improve the degree of hardness and wear resistance of the connector, connectors are generally plated with hard gold plating process, which uses more gold-cobalt alloys and gold-nickel alloys, when the cobalt and nickel content in the plating solution will cause changes in the color of the gold plating layer, if the cobalt content in the plating solution is too high the color of the gold layer will be red, if the nickel content in the plating solution is too high the color of the metal will become lighter.

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