What function do deoxidizing elements primarily serve in filler metals like ERTOS-2?

Deoxidizing elements in filler metals, such as ERTOS-2, primarily serve to reduce impurities in the weld. When welding, especially in situations where the base material may contain oxides and other contaminants, deoxidizers react chemically with these impurities. This reaction helps to prevent the formation of oxides and other undesirable compounds during the welding process, which can compromise the integrity and quality of the weld. By ensuring that the welding environment is free of excessive oxidation, deoxidizing elements help produce a clean and sound weld, ultimately leading to better mechanical properties and overall performance of the welded joint.

While tensile strength, flexibility, and appearance are relevant factors in assessing the quality and properties of a weld, they are not the primary functions of deoxidizing elements in filler metals.