Casting flux is used to
Correct Answer: Prevent the oxidation of material during melting.
Description: Fluxes are specifically used
To remove gas or prevent its absorption into the melt.
To reduce metal loss.
To remove specific impurities and nonmetallic inclusions
To refine metallic constituents, or to lubricate and control surface structure in the semi-continuous casting of metal alloys.
Key concept
Flux powder may be sprinkled over the molten metal to reduce the oxides and increase fluidity for casting.
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