Causes and solutions:
1. The surface of the plating is not clean
⑴ The surface of plating contains paint, fat, and welding;
⑵ oxides; lack of acid washing; continued to pick up.
2. Pickled and operation:
⑴ Pickle and excessive washing. Pickle is the oxide (rust spots) left with iron on the surface of the plating; excessive acid washing makes the steel matrix surface tissue destroyed, and the SI and a small amount of lively metal are difficult to melt oxides on the surface of the plating to prevent the surface of the plating, preventing it from the surface of the plating to prevent it from preventing it from the surface of the plating. The combination of iron zinc. Or due to excessive acid washing, when the plating is absorbed by hydrogen, when the hydraulus is galvanized, hydrogen and other heat expansion are leaked and plated. Solution: Strictly control the pickling and grasp the pickling time.
Plated parts are superimposed and backlogs during the picking, causing leakage, or because of the reasons in the structure of the plating, it is sparse and caused by turning the vortex. Solution: Pick up as much as possible and turn it frequently.
3. Guling link
⑴ The concentration of the auxiliary is low, and the aid effect is not satisfactory; solution: adjust the concentration of the adaptive auxiliary.
The proportion of the aids is improper, and the zinc salt content is high, so that the salt membrane is easy to absorb water, and the hydroxide is decomposed into a gas to explode zinc, which forms a leak. Solution: Adjust the auxiliary ratio.
In the hot -dip galvanized processing, there are ten ways to solve the method of solving hot -dip galvanized leakage as follows:
1. Strengthen the preliminary treatment of hot galvanized galvanized;
2. Try to shorten the time of the process;
3. Ensure the quality concentration and reasonable ratio of the plating agent;
4. Prevent excessive heat and damage to the plating agent;
5. The aluminum content in zinc liquid is controlled below 0.05%. It is recommended to use 5-10%aluminum content intermediate alloys, and it is not possible to use pure aluminum ingot directly;
6. Keep the surface of the hot -dip galvanized zinc liquid at the entrance of the workpiece clean and prevent the aluminum content from enriching.
7. Avoid high -carbon steel excessive washing
8. Thoroughly clear the splash of welding slag and welding slag
9. After the surface of the flame cutting area, the residual matte is completely removed.
