Which is better, flux or rosin?

Flux and rosin each have their own characteristics and advantages in the soldering process, the choice of which is better to use needs to be based on specific application scenarios to decide.

Below are the main features and comparisons of fluxes and rosins:

Flux:

Function: Flux is a chemical substance mainly used to reduce the surface tension between soldered metals, to facilitate the soldering process and to prevent oxidation reactions. It usually consists of an active agent, a solvent, etc., which reduces the surface tension of metals and promotes fusion during soldering.

Advantages: Flux has excellent performance in welding metals, especially suitable for occasions requiring high precision and strong corrosion resistance requirements. It has strong active performance and is widely used in high precision applications such as soldering circuit boards.

Disadvantages: Some types of flux (such as flux containing rosin) will leave slag and residue after soldering, which may gradually decompose under the working environment of electrical appliances and produce harmful chemicals, which will have a certain impact on the reliability of electronic components.

Rosin:

Role: Rosin is a natural resin mainly used for soldering circuit boards and electronic components. It removes oxidised layers, helps fusion between soldered metals and has the advantages of easy cleaning, safety and non-toxicity.

Benefits: Rosin provides better wettability, making it easier to fuse solder joints once they are melted. Also, rosin is cheaper and is one of the most common ingredients used to make flux.

Cons: Compared to fluxes, rosin tends not to exert the same activity, and the application scenarios are not as wide-ranging as those of fluxes.

Summary:

① In the welding of metals or the need for high precision, corrosion resistance requirements of strong occasions, flux may be more appropriate, because it has a stronger activity and a wider range of applications.

② In the soldering of circuit boards and electronic components and other occasions requiring strong wetting, rosin may be a better choice because it provides better wetting and lower cost.

Next, I would like to recommend Fuyinda flux, which has good fluxing performance, easy cleaning characteristics and environmental friendliness, and has now become a reliable choice for electronic soldering. Especially for the need for high precision, corrosion resistance requirements of strong occasions, FuYingDa flux is more suitable. If you have any needs about Fuyinda flux or other needs, you are welcome to contact us at any time, and we look forward to communicating with you.

Please note that the above information is for reference only, the specific choice should be decided according to the actual needs and scenes.