is a chemical used in metalworking, particularly in soldering , welding , casting, and metal joining processes. Its purpose is to remove oxide from metal surfaces, ensure proper solder/metal adhesion, and prevent undesirable reactions that may occur during joining.
???? Basic Usage Purposes of Flux:
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Cleans oxides on the surface.
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It facilitates the flow of solder.
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Provides better adhesion to metal surfaces.
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It prevents the surface from re-oxidizing during the process.
???? Where is Flux Used?
| Application Area | Purposes of Use |
|---|---|
| Electronic Soldering | Easy soldering of components on PCB |
| Silver / Gold Soldering | Joining metal pieces in jewelry |
| Brass, Copper Soldering | Plumbing works and jewelry making |
| Glass Decoration / Enamel | Facilitating the bonding of metal with glass |
| Brazing | High temperature metal joining processes |
???? How to Use Flux – Step by Step
1. Clean the Surface
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Before applying flux, clean the dirt, oil and oxides on the metal surface .
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Acetone, alcohol or sandpaper can be used.
2. Apply Flux
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Apply a thin layer with a brush, toothpick or stick.
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It can be in liquid, gel or powder form.
3. Solder / Heat
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Soldering is done by heating with solder wire or weld metal.
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Flux is activated with heat and cleans the oxide on the surface.
4. Cleaning (Optional but Recommended)
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After the process is finished, clean the flux residues with alcohol or special cleaner .
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Flux residue can cause conductivity problems , especially in electronic circuits .
⚠️ Things to Pay Attention to
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Excessive flux use can cause damage, especially in electronic circuits.
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Cleanliness after application is important (especially with rosin-based fluxes).
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Acidic fluxes can cause surface corrosion over time.
???? Use of Flux in Jewelry and Jewellery
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It is used when soldering gold, silver and brass parts.
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Generally, borax-based flux is preferred.
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It ensures that the metal surface remains clean and the solder adheres well during flame heating.