Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695



Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695
Textbook Problem

What are the three primary functions that a flux must perform?

To determine

The primary functions performed by the flux.


The flux material helps to clean the surface before the joining process by removing or reducing the oxides formed on the surface. Fluxes also help in enhancing the capillary action, this enhanced capillary action is the reason of filler metal flowing inside the spacing between the parts.

Figure: Fluxes remove the oxides and clean the surface which helps in preparing a better joint.

The flux used in the brazing and soldering process serves the following purposes:

  1. Flux must help in removing the oxides forming on the surface. The oxides may form due to heating the parts involved in joining.
  2. The flux helps in wetting the surface which allows the filler metal to spread evenly in the form of a very thin layer on the surface of the solid base metal...

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