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What is the difference between flux, flux paste and solder paste?

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Update time : 2022-12-02 20:29:12
In the electronics industry, I believe everyone has heard of electronic solder such as flux, solder paste, and solder paste. Flux, solder paste, and solder paste are all used in soldering processes, and there are still obvious differences between them. Yes, let's introduce it in detail:
1. First of all, from the appearance, we can clearly see that the flux can be divided into solid, liquid and gas. The flux that is common in the solder industry and often mentioned by people is liquid, and the so-called solder paste and Solder paste is creamy, the color of solder paste is transparent or yellowish, and the color of solder paste is gray or black.
2. The main components of soldering flux and soldering paste are rosin. The difference is that the production process is different, and the proportion of solvent added is different to form a different state. The flux is composed of rosin, activator and other additives. It is processed into a liquid and is often used in conjunction with the tin bar wave soldering process.
Soldering paste is a paste-like soldering substance formulated from raw material rosin and special chemical substances. It plays an auxiliary role in soldering in the component welding process. It is a synthetic substance in the production process of solder paste. It is often used with Solder paste is used together, or post-soldering and repair soldering are used together with tin wire after the patch is completed.
Solder paste is a paste mixture formed by mixing solder powder, flux, and other surfactants, thixotropic agents, etc. It is a new type of welding material that came into being along with SMT. It is mainly used for welding electronic components such as PCB surface resistance, capacitors, and ICs in the SMT industry.
3. Flux and solder paste both play an auxiliary role in welding. In addition, they can remove surface oxides and prevent oxidation during welding operations; reduce the surface tension of materials, thereby improving welding quality and significantly improving wettability. effect. Solder paste is like a medium between soldering. Its main function is to solder electronic components. It can directly solder different components together, just like building a bridge.
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