What is a typical role of flux in brazing?

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Multiple Choice

What is a typical role of flux in brazing?

Explanation:
Flux in brazing cleans and protects surfaces during heating. It chemically removes oxide films on both base metals and the filler metal, and then forms a protective layer that helps keep new oxides from forming while the joint is heated. This cleaning and protection allow the brazing filler metal to wet the surfaces and flow into the joint by capillary action, producing a strong, sound joint. In short, its typical role is to prevent oxidation and enable proper wetting. It does not lower bond strength, and it does have a real effect on joint quality.

Flux in brazing cleans and protects surfaces during heating. It chemically removes oxide films on both base metals and the filler metal, and then forms a protective layer that helps keep new oxides from forming while the joint is heated. This cleaning and protection allow the brazing filler metal to wet the surfaces and flow into the joint by capillary action, producing a strong, sound joint. In short, its typical role is to prevent oxidation and enable proper wetting. It does not lower bond strength, and it does have a real effect on joint quality.

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