When we use potassium chloride galvanizing brighteners for production, if there is good mixing, then it can reduce the sensitivity of the coating to impurities. The article in this issue analyzes the reasons for this.
Stirring increases the permissible cathode current density and reduces the burning of the plated layer while suppressing the side reaction of hydrogen precipitation and reducing the amount of hydrogen precipitation, thus decreasing the failure rate of the plated layer to produce gas pinholes and pockmarks, decreasing the amount of hydrogen seepage from the plated layer, and decreasing the hydrogen embrittlement danger. Stirring makes the hydrogen precipitated on the surface of cathode not easy to stay on the surface but escape uniformly as soon as possible, so as not to reduce the bright uniformity of the plated layer.
To help you understand this concept, let's take an example, Bigely engineers once production site found that: a plating plant in the use of potassium chloride galvanizing brightening agent in the mass production, found that the plane pieces of black zinc passivation, if the static plating may appear color passivation and white passivation are not easy to find from the bottom to the top of the bright color streaks, and cathodic movement is not a similar phenomenon.
Why does this happen? Engineers analyzed the problem because during static plating, hydrogen gas flow is continuously generated from some points along the surface of the workpiece, and the localized flushing and stirring results in the appearance of a range of stripes that are brighter than the rest of the workpiece. If the cathode is moved, the problem can be solved by preventing the generation of hydrogen precipitation stripes.
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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.
If you need our high-quality electroplating additives, please contact us. We can provide you samples for test, and also provide a series of services.
