Knowledge | 2022-12-13
The application of ultrasonic cleaning machines in coating treatment technology and the role in the liquid
The ultrasonic cleaning machine
before the painting treatment process is very important, general conservative process is degreasing, washing, hydrochloric acid rust, washing, neutralization, washing, surface conditioning, washing, phosphating, washing, and drying. The disadvantage of this process is that it is difficult to remove the residual acid after the complex structure parts are pickled and de-rusted, especially after the welding assembly is phosphate. After spraying, the workpiece will rust along the crack in 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, anti-theft doors.
Through the research and practice of ultrasonic cleaning machines in phosphating treatment in recent years, good results have been achieved in improving spray quality and preventing rust from coating parts
In the processes of degreasing, rust removal, water washing, surface adjustment, phosphating, etc, the liquid that permeates the weld is difficult to discharge, and the water washing can not completely remove the inclusion, it is easy to cause the workpiece to yellow and rust under the hot and humid conditions. If the residue can not be completely dried during the drying process, when the powder is sprayed and dried at high temperature, the residue will seep out from the weld due to thermal expansion, which will affect the bonding between the coating and the metal surface, the adhesion of the coating is reduced or even dropped.
Ultrasonic cleaning machine process parameters
The ultrasonic cleaning temperature is an important factor affecting cleaning speed. Increasing the cleaning temperature properly can improve the cavitation ability and shorten the cleaning time, but the cavitation effect will decrease with the increase of steam pressure after a certain temperature, so it must be kept at a certain temperature. The results show that the water-soluble medium is generally 50 ° C ± 5.
The function of ultrasonic cleaning machine in liquid
The principle of the ultrasonic cleaning machine is the recovery of some precious metal ions, such as silver ions, and other heavy metal ions, especially those that simply form environmental pollution of heavy metal ions such as chromium, copper, and other heavy metal ions. Electrochemical treatment of sewage, especially the ions in sewage, has many advantages. First, it reduces the ions in sewage, and second, the metal recovered by an electrochemical high-frequency rectifier can be recovered and reused, both useful maintenance of the environment, and can promote the development of waste recycling.
The electrolytic power supply used in sewage treatment has some requests, and the electroplating same, the electrolytic power supply in the sewage treatment skill usually is the high current low voltage direct current power supply or the single pulse power supply equipment, the development process is similar to that of electroplating power supply.
Now, most of the choice is high-frequency electrolytic power supply, which is conducive to the re-widening of power, reduce space occupation, reduce energy consumption, and forward working efficiency. Another very important point is that in electrolytic power, especially for sewage treatment, the current carrying capacity is much greater than the voltage, that is, high current low voltage, the voltage usually does not exceed 36V, normally 12V is sufficient, but the current ranges from 200A to 300A and from 2000A to 5000A or more depending on the composition of the wastewater and the treatment process.
Electrochemical methods in wastewater treatment have become increasingly sophisticated, and many types of electrochemical wastewater treatment skills are now very well developed, such as electroplating wastewater treatment, wastewater electrolysis recovery of precious metals, and other skills.
The use of other electrolytic power sources in metal recovery is similar to the use of metal recovery in wastewater treatment, the difference being that the concentration of metal ions in the wastewater recovered from metal recovery is higher, for example, wastewater from surface treatment plants such as electroplating plants and oxidation treatment plants has relatively reduced the cost of recovering metals, the metal recovery in sewage treatment is mostly to reduce the concentration of metal ions in sewage to meet the discharge standards, the metal recovery cost is relatively high.