What should be done to the end of the filler rod if it becomes oxidized during the welding process?

When the end of the filler rod becomes oxidized during the welding process, the appropriate action is to cut the bad end off. Oxidation on the filler rod can lead to contamination during the welding process, which might compromise the integrity of the weld. A clean, uncontaminated filler rod is essential for maintaining the quality of the weld, as impurities can introduce defects such as porosity or weak bonding.

While cleaning the rod with a solvent or heating it to remove oxidation may seem like viable options, these methods may not adequately restore the filler rod to a usable condition. Cutting off the oxidized end ensures that you are starting with a fresh, uncontaminated surface that will properly blend with the molten weld pool, resulting in a stronger and more reliable weld. Using the oxidized end as it is can lead to defects, thus compromising the welding outcome.