In metallurgy, flux is a substance added to ores to react with gangue and form a fusible slag; in soldering, it cleans and improves wetting; in physics, “flux” can also mean a flow rate through a surface.Metallurgical FluxPurpose: Remove impurities by forming slag that floats and can be separated.Types:Acidic flux: SiO₂ removes basic oxides.Basic flux: CaO, CaCO₃ remove acidic oxides (e.g., silica).Examples: Limestone in iron blast furnaces; fluorspar to lower melting point.Soldering FluxRemoves oxide layers, prevents re-oxidation, improves metal wetting.Common types: rosin, inorganic (zinc chloride), no-clean formulations.Physics UsageFlux = amount of a quantity crossing a surface per unit time (e.g., magnetic flux, heat flux).

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Detailed Solution

In metallurgy, flux is a substance added to ores to react with gangue and form a fusible slag; in soldering, it cleans and improves wetting; in physics, “flux” can also mean a flow rate through a surface.

Metallurgical Flux

Purpose: Remove impurities by forming slag that floats and can be separated.
Types:
- Acidic flux: SiO₂ removes basic oxides.
- Basic flux: CaO, CaCO₃ remove acidic oxides (e.g., silica).
Examples: Limestone in iron blast furnaces; fluorspar to lower melting point.

Soldering Flux