PCBA processing factory is still very necessary for the PCBA water washing process. After the circuit board undergoes various processing production processes such as SMT chip processing, plug-in, hand soldering, etc., some residues will generally remain on the board. . In the general water washing process, water is used as the cleaning medium. A small amount of surfactants, corrosion inhibitors and other chemical substances are added to the water. After washing, the cleaning process is completed by multiple source and deionized water source washing and drying. .
The advantage of water cleaning is that the cleaning medium for water cleaning is generally non-toxic, does not endanger the health of workers, and is not flammable or explosive. Therefore, it has good safety. Water cleaning has particles, rosin flux, water-soluble pollutants and polar pollution Goods have good decontamination effect.
The disadvantage of PCBA processing water washing process is that the entire equipment investment is large, which requires investment in pure water or deionized water. In addition, it is not suitable for non-airtight devices, such as adjustable potentiometers, inductors, switches and other water vapor into the device is not easy to discharge, or even damage the ring components.
Water washing technology can be divided into two processes: pure water washing and adding surfactant in water. The typical PCBA process flow is as follows:
Water + surface activity (washing) → water (washing) → pure water (rinsing) → ultrapure water (rinsing) → hot air (drying).
