In hot-dip galvanizing processing, missing plating is sometimes encountered. There are ten ways to solve the problem of missing plating in hot-dip galvanizing as follows:
1. Strengthen the preliminary treatment of hot-dip galvanizing;
2. Minimize the residence time of the process;
3. Ensure the mass concentration and reasonable ratio of plating flux;
4. Prevent overheating and burning of the plating flux;
5. The aluminum content in the zinc liquid should be controlled below 0.05%. It is recommended to use a master alloy with an aluminum content of 5-10%, instead of directly using pure aluminum ingots;
6. Keep the surface of the hot-dip galvanizing liquid at the entrance of the workpiece clean and prevent aluminum content from being enriched;
7. Avoid pickling of high carbon steel;
8. Thoroughly remove welding slag and welding slag spatter;
9. After grinding off the surface of the flame cutting area, completely remove the remaining abrasive;
10. High-concentration solvents can be applied in advance to places where hot-dip galvanizing leakage is likely to occur.
