What is oxidation in welding?

Oxidation in welding refers to a chemical reaction that occurs between the materials being welded and oxygen. When metals are exposed to oxygen, especially at elevated temperatures, they can undergo oxidation, which results in the formation of oxides on the surface of the metal. This can lead to various problems during the welding process, including contamination of the weld pool and weakening of the weld joint.

In the context of welding, managing oxidation is crucial for producing high-quality welds. Excessive oxidation can impede fusion between the base metals and the filler material, leading to defects such as porosity, reduced strength, and poor appearance in the weld. Understanding this chemical process allows welders to take appropriate measures, such as using shielding gas or other protective techniques, to minimize oxidation and ensure a successful weld.

The other options do not accurately describe oxidation in welding. Enhancing welding speed, voltage settings, and techniques for applying filler metal are separate elements of the welding process and do not encapsulate the definition of oxidation.