What role does flux play in the welding process?

Flux is a critical component in the welding process, particularly in methods such as shielded metal arc welding and flux-cored arc welding. Its primary role is to prevent oxidation and contamination of the molten weld pool and the base materials. When metals are heated to their melting points, they become susceptible to oxidation, which can compromise the integrity of the weld. The flux creates a protective barrier that shields the weld from atmospheric exposure, thus ensuring a cleaner weld with better bonding between the metal pieces.

This action of preventing oxidation is essential for producing strong, quality welds. Proper use of flux contributes to minimizing defects such as porosity and inclusions in the finished weld. Therefore, the importance of flux in maintaining the quality and strength of the weld cannot be overstated, making it a vital component in various welding applications.