Today we are going to talk about the application of ultrasonic cleaning machine in phosphating treatment and coating treatment. Through the research and practice of ultrasonic cleaning machine technology in phosphating treatment in recent years, we have achieved good results in improving product spraying quality and preventing coating parts from rusting.
The general traditional process is degreasing, water washing, hydrochloric acid derusting, water washing, neutralization, water washing, surface conditioning, water washing, phosphating, water washing and drying. The major disadvantage of this process is that it is difficult to clean the residual acid after pickling and derusting the parts with complex structure, especially after phosphating the welding assembly, the residual liquid contained in the crevice affects the processing of the next process.
After spraying, the workpiece will rust along the crack for a short time, and the coating surface will be damaged. Seriously affect the appearance and internal quality of products. Such as motorcycle wheels, fuel tank, frame, security door, etc.
Shandong ultrasonic cleaning machine
Ultrasonic cleaning machine rinsing is the process of removing oil, rust, water washing, surface adjustment, phosphating, etc. it is difficult to discharge the liquid in the welding seam, and the water washing can not completely remove it. Under hot and humid conditions, inclusions are easy to cause yellowing and rust of the workpiece.
If the residual liquid can not be completely dried in the drying process, then when the powder spraying is dried at high temperature, the residual liquid will seep out of the weld due to the effect of thermal expansion, which will affect the combination of the coating and the metal surface, resulting in the decrease or even detachment of the coating adhesion.