![]() You can clean the flux by simply using your old toothbrush. Clean it with the daily essential tools at your home.Cleaning fluids are usually flammable chemicals, preventing fire when using them. When the cleaning fluid becomes dirty, it should be replaced in time.The cleaning liquid should not be scattered, and do not use the cleaning liquid excessively to prevent the inside of the product where the cleaning liquid is scattered and reduce the product performance.The cleaning action should be light and not twist and pull the wires on the solder joints or the leads of the components. Do not damage the solder joints and components.When cleaning, it needs the following items: Simple, good cleaning effect is good, but the efficiency is low.Ĭommonly, manual cleaning tools are brushes, tweezers, cotton yarn, etc. The manual cleaning is suitable for all kinds of solder joints. Use hand tools to remove residual flux and dirt from solder joints. Methods to clean flux from the printed circuit boards The cleaning flux can generally be divided into two categories: manual cleaning and ultrasonic cleaning. If there is conductivity and white residue after cleaning, that is caused by cleanliness. If you are doing PCBA service, and the customer must remove the residue on the PCBA, then it must be cleaned during the PCBA process. In addition, no-clean flux cannot allow the residue to accumulate together, so white residues are produced easily, such as lead oxide or bromide, which is the reaction product of flux and solder. It does not mean that there is no residue after soldering. ![]() The no-clean flux in the PCB industry means there is no need to clean after the wave soldering, and it will not cause electrical performance problems. Before knowing whether it needs to be removed, we should first understand two concepts: cleaning and no-cleaning. It should comprehensively consider various factors such as the quality of the selected flux, product requirements, and production cost. That is because the flux (paste) is generally not wholly volatilized during the soldering process, and residues will be left on the board. There may be a lot of solder slag on the PCB board during the PCB soldering process. Does flux need cleaning during PCB soldering? The water-soluble flux ensures better performance irrespective of the conditions. ![]() This flux contains resin and organic compounds. So, it is better to work with it cautiously. However, it generally contaminates the PCB. It ensures dry board after soldering by absorbing the residues and acids. It doesn’t require any more cleaning than other fluxes. These fluxes allow the manufacturers to use it without worrying about cleaning it after its use. ![]()
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