What are Flux Voids in Welding?

Flux voids are one of the most serious problems that can occur during welding, especially with low alloy types of flux-cored electrodes. Voids can cause the weld to be less strong and more susceptible to cracking. In some cases, they can also lead to poor electrical conductivity and increased welding costs.

Why do flux voids occur?

Voids can occur for a variety of reasons, but the most common cause is improper welding technique. Other factors that can contribute to void formation include:

  • poor electrode preparation,
  • incorrect torch angle,
  • and low gas flow rates.

How to avoid flux voids?

To avoid flux voids, it is important to use the correct welding technique and follow all manufacturer’s instructions carefully. If you are unsure of how to weld correctly, it is best to seek professional help.

Why do my flux core welds have holes?

Flux core welding is a type of welding that uses a flux-coated electrode to create an electrical arc between the electrode and the metal being welded. The flux coating on the electrode burns away during welding, leaving behind a protective layer of slag.

What is flux shielding?

Flux shielding is a process in which an inert gas, such as argon, is used to shield the weld from atmospheric contamination. This helps to produce a higher quality weld and reduces the risk of defects.

Related Links

Avoiding the Void in Flux-Cored Solder Wire | Robert McKerrow | Indium Corporation Blogs | Solder Wire
Which solder flux is the best to reduce void formation?
Flux effect on void quantity and size in soldered joints – ScienceDirect
Flux effect on void quantity and size in soldered joints