The correct addition of alkaline zincate zinc plating additives can ensure that the product obtains a good coating. However, improper addition will adversely affect the quality of the coating. Therefore, how to correctly use and supplement additives directly affects the quality of alkaline zinc plating.
The supplementary rules of all additives are basically the same, and the principle of addition is "small amount and more", that is, a small amount of supplementary methods are adopted to prevent the adverse effects caused by excessive amounts. At the same time, the temperature of the added alkaline zincate zinc plating additives should not exceed 30℃. Although some processes allow as high as 40℃, at this temperature, the consumption of alkaline zincate zinc plating additives will increase and the stability of the plating solution will also decrease.
The more scientific method is to add alkaline zinc plating additives through electricity consumption (ie amperage), and to monitor whether the amount of alkaline zinc plating additives in the plating solution is within the appropriate range at any time. It can be monitored by the Hall cell experiment, which can be based on the thickness of the coating. Change the situation to judge whether the amount of alkaline zincate zinc plating additives is normal.
Alkaline zincate zinc plating additives have a strong adsorption capacity on the cathode, and their dosage is basically proportional to the adsorption capacity. The adsorption of excessive alkaline zinc plating additives will greatly improve the dispersibility of the coating, but the coating itself However, its performance will drop sharply, such as increased brittleness. Therefore, the correct addition of Alkaline zincate zinc plating additives is very important.
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