The coating adhesion of electrostatic spraying equipment is poor
In the long-term use of electrostatic spraying equipment, the phenomenon of poor coating adhesion sometimes occurs. What is the reason for this phenomenon? The following are the reasons and solutions for this phenomenon:
1. Before using the electrostatic spraying equipment, if the pretreatment water is not rinsed thoroughly, it will damage the surface of the workpiece with degreasing agent and phosphating residue, or the cleaning tank will be polluted by alkali, which will eventually lead to poor adhesion. To solve this problem, it is necessary to strengthen the washing work and adjust the degreasing process parameters to prevent the degreasing liquid from entering the washing tank after phosphating.
2. If the curing temperature is not enough, it will cause poor adhesion of the coating on a large area, so it is necessary to increase the curing temperature.
3. In order to increase the phosphating temperature, the concentration and proportion of the phosphating solution must be adjusted.
4. The oil content and salt content of the raw water from deep wells will cause poor adhesion of electrostatic spraying equipment. By adding an inlet filter device, pure water can be used as the last two washing water, and a further purification effect can be obtained.
5. If the poor adhesion of the electrostatic spraying equipment is caused by the dry end of the corner moisture, it is mainly solved by increasing the drying temperature. So, about the reasons and solutions for the poor coating adhesion of electrostatic spraying equipment, the editor will introduce here, I hope it will be helpful to you.