During the process of using potassium chloride zinc plating brightener, sometimes there are white water marks on the surface of the plating layer of the produced workpiece. How did this phenomenon come about?
Based on on-site experience and the characteristics of the product potassium chloride zinc plating brightener BZ-528, Bigley Technology has analyzed the following three main points:
1. The workpiece has defects during mold opening, and it is prone to water accumulation during the galvanizing process. After galvanizing, the water accumulation position will corrode outward and produce white water marks. Regarding this, when opening the mold, the workpiece should be considered in accordance with the actual situation, and the gaps in the drainage of the workpiece solution should be taken into account.
2. The gaps on the surface of the workpiece have residual dirt, and during the galvanizing and passivation process, there is also a tendency for residual liquid to corrode outward and produce white water marks. Therefore, ultrasonic treatment is added to the passivation process after pre-treatment and galvanizing to completely remove dirt and residual liquid in the gaps.
3. The workpiece was not thoroughly washed during the galvanizing and passivation process, and the remaining plating or passivation solution in the gaps was not thoroughly cleaned. Therefore, it is recommended to keep the cleaning water clean in the water bath of the galvanizing and passivation processes, and to add a hot water bath to clean the residual liquid in the gaps of the workpiece.
Therefore, in the process of using potassium chloride zinc plating brightener, when there are white water marks on the surface of the workpiece coating, attention should be paid to the above three points, timely troubleshooting, and reducing losses. If you are interested in potassium chloride zinc plating brightener, please contact Bigley customer service for free samples and detailed technical information!
If you want to learn more about galvanizing, you can click to view the "Common problem".