Flux
| Also Known As | Soldering flux, metallurgical flux, welding flux, fluxing agent |
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What is Flux?
In chemistry and metallurgy, flux is a substance used to promote the fusion of metals or minerals. It works by dissolving metal oxides and other impurities, lowering the melting point of the mixture, and preventing oxidation. Common fluxes include borax, limestone, and resin. In physics, flux refers to the rate of flow of a property (energy, particles) through a surface.
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
In chemistry and metallurgy, flux is a substance used to promote the fusion of metals or minerals. It works by dissolving metal oxides and other impurities, lowering the melting point of the mixture, and preventing oxidation. Common fluxes include borax, limestone, and resin. In physics, flux refers to the rate of flow of a property (energy, particles) through a surface.
Iron and steel making (limestone flux removes silica impurities). Welding and soldering (prevents oxidation). Glass making (Na₂CO₃, B₂O₃). Ceramic glazing. Brazing and hard soldering. Mineral processing (flotation). Laboratory flux for sample preparation (fusion).
Flux fumes during soldering/welding can cause respiratory irritation. Acidic fluxes (zinc chloride) are corrosive. Flux residues may be conductive and cause electronic failures. Borax and fluoride-containing fluxes require special handling. Adequate ventilation essential during use.