Analysis of the Treatment Methods for the Problem of Non-uniform Paint Film during the Electrophoretic Paint Coating Process
Electrophoretic paint is a chemical product, so it is normal for various problems to occur in electrophoretic coating. I have analyzed the causes and treatment methods of many problems with electrophoretic paint film. Today we will analyze the electrophoretic paint film for everyone. The problem of unevenness.
The main phenomenon of uneven paint film is the uneven thickness of electrophoretic paint film. What causes it? Continue to the following analysis.
The main reasons are:
1. The voltage of the coating is not adjusted; 2. The temperature of the electrophoresis bath is too high; 3. The solvent content in the bath is too high during the electrophoresis period; 4. The gap on the workpiece or the hoisting interval is too narrow; 5. Inappropriate; 6. The pole spacing is too small; 7. The local current density is too large; 8. The paint performance in the tank is unstable; 9. The circulation speed of the electrophoresis bath is too low or uneven.
Then how to deal with it, the main solutions are as follows: 1. Adjust the voltage according to the shape of the workpiece and the hanging area; 2. Control the temperature of the bath at about 28 ° C; 3. Adjust the content according to the result of the solvent analysis; 4. Adjust the workpiece The interval or hoisting interval is more than 3cm; 5. Adjust the hanging area so that the pole ratio is 1: 1-5: 1; 6. Cover and shield some electrodes with plastic plates or adjust the installation layout; 7. Reduce paint Excessive fluctuations in liquid and solid content; 8. Increase the frequency of ion exchange; 9. Increase the circulation speed of the electrophoresis tank liquid and adjust the angle of the circulation nozzle.
Through the several common treatment methods analyzed above, the problem of uneven electrophoretic paint film can be basically solved, but the specific situation must be analyzed in detail. As long as you observe carefully, you can find the cause of the problem. If everyone is in the process of processing If you don't understand anything, you can contact Hongheshun electrophoretic paint technician to help you analyze and deal with it.