What are the types of soldering iron flux
The types of flux include rosin or rosin alcohol solution, etc. When soldering electronic components, the best flux is rosin or rosin alcohol solution.
Rosin is a neutral substance and has no corrosive effect on electronic components. Note that the residue of the solder paste after use is near the weldment and will be contaminated with dust. The residue is an acidic substance that will corrode the components to a certain extent.
Therefore, except for welding mechanical weldments such as iron sheets, it is forbidden to use solder paste as flux for instrument circuit maintenance.
The role of flux
When using a soldering iron, if the solder does not have flux, it cannot be soldered. The performance of the flux determines the quality of the soldering.
The main function of flux: remove the oxide film of the weldment, prevent the oxidation of the welding surface, increase the fluidity of the solder, and help the solder to wet the weldment.
Method for preparing rosin alcohol solution
Grind rosin into powder and add absolute alcohol to make rosin alcohol solution.
Find a glass bottle with a sealable mouth, put the rosin powder into the bottle, add analytical pure alcohol, screw on the cap, let it sit for a few hours, shake the glass bottle to dissolve the rosin powder, and check for rosin deposits.
You can also add a certain amount of rosin powder, and wait until you see sediment.
