A netizen message that the use of electroless nickel plating potion in the production process, regardless of the medium phosphorus electroless nickel or high phosphorus electroless nickel, there will always be plating welding performance is not good, what is the reason for this?
1. Phosphorus content of the plating layer. Electroless nickel plating layer solderability and plating phosphorus content is inversely proportional. When the phosphorus content of the plating layer is low, the plating welding performance is better; when the phosphorus content of the plating layer in 9% or more, the plating welding performance is poor. This is because phosphorus is non-metallic, with the increase of phosphorus content, the non-metallic properties of the plating layer gradually increased, the worse the solderability of the plating layer.
2, The influence of plating conditions. Different plating conditions, the plating layer obtained is different, that is, the plating process of the concentration of the plating solution, temperature, pH will have a great impact on the phosphorus content. The phosphorus content decreases as the temperature rises; the phosphorus content of the plated layer decreases accordingly as the pH rises. Therefore, in order to obtain good solderability performance of the coating, plating process parameters should be controlled in the process range.
3, The influence of plating thickness. Electroless nickel plating layer of solderability with the thickness of the plating has a relationship, the thickness of the plating layer is too low, the porosity is very high, solder paste in many places with the base metal contact can not be dispersed, resulting in poor welding. Therefore, the thickness of chemical nickel plating layer should be more than 1 micron.
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Guangdong Bigely Technology Co., Ltd. ,founded in 2003, is a high-tech enterprise integrating R & D，production, sales and service, specializing in the production of electroplating additives. As a famous electroplating additives source manufacturer in China, Bigely has over 20 years' experience in electroplating additives production and own production base of 5000 square meters. We can produce 15,000 tons of electroplating additives every year, which can fully meet the needs of customers.
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