![]() Without proper cleaning, the solder won’t stick properly. This chemical compound cleans away oxidation from the metals before soldering. The process requires a particular type of solder called flux. Soldering involves metal wire or other conductive material to form electrical connections. In this article, we’ll explain What flux is used for and how to Use Flux in Soldering. Soldering is a common technique used in electronics manufacturing. The primary focus for a strong connection is to make a clean metal surface free of impurities and oxides, this is what the soldering flux is used for. The flux is used in the automatic and manual soldering processes. What is Flux Used for in Soldering?įlux is a chemical cleaning substance that helps in removing oxides and impurities from the soldering surfaces to have a strong connection. In this article, I will explain what is flux used for and how to use soldering flux. Now the question is what removes impurities and cleans the surface before soldering. In this Guide, You will learn what a soldering flux is and What are the three types of flux? If you do not know What is Flux Used for and why flux is used in soldering? Do not worry, You are at the right place. In the soldering process for a strong connection, the flux plays a vital role in the removal of impurities and oxides. We will not post your email address.If you are an electronic engineer or deal in various electric circuits and PCB Assembly, Definitely you know about the soldering process. You must include your full name to have your comments posted. Initially Published in the SMTA ProceedingsĬomments are reviewed prior to posting. It is intriguing that Flux A's SIR was better than the other 5, requiring future research and experimentation to arrive at a conclusion. However, it is important to remember that the organic fluxes were above the minimum of log10 R = 8 ohms and passed per J-STD-004B.įive out of the 6 fluxes' pattern down means were lower than the pattern up means, which is to be expected. Having a higher resistivity implies that the material will be more resistant to dendritic growth and other defects. The rosin-based fluxes are more than 2 orders of magnitude greater in SIR than the organic fluxes. The log10 of the overall average for the rosin-based fluxes was 11.76 ohms, while the organic fluxes were stable at 9.33 ohms. Having the data presented this way makes it easier to see a clear disparity between the rosin containing fluxes and their organic counterparts. This is why the data was broken down further and represented in Figure 16. In addition, microphotographs of typical resulting solder joints were taken to observe workmanship and esthetic properties of the solder joints.īoth the organic fluxes and the rosin-based, no-clean fluxes passed the SIR test, which made it difficult to ascertain a trend. Data were collected to determine the reliability of three rosin-containing and three non-rosin-containing wave fluxes. To evaluate the quality of the resulting assemblies, the current IPC surface insulation resistance (SIR) test was employed. The previously mentioned variables were varied in a designed experiment format. In this series of experiments, the independent variable was the flux type. ![]() ![]() The choice is made as a result of multiple factors that come into play when wave soldering, such as thermal profile, type of flux, flux application, solder alloy type, preheat time, temperature, and wave contact time. If the assemblies are not cleaned, the residue can cause corrosion and dendritic growth.Ī manufacturer can choose either a rosin-containing or a non-rosin-containing flux based on the solvent used, the ratio of flux to solvent, and the current cleaning process, to name a few. In comparison, non-rosin fluxes - especially water-wash - contain aggressive acids that need to be cleaned off after the wave soldering process. Rosin-based fluxes are non-corrosive at room temperature, hygroscopic, and normally cure at room temperature to entrap potentially corrosive activators. They are based on material obtained from pine trees and other plants, primarily conifers. Is there a benefit to using wave soldering fluxes that contain rosin versus ones that do not? Rosin-based fluxes are some of the original types of fluxes used in the early years of the electronics industry. ![]()
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