What are the dirt and oxides that are trapped in welds called?

The term that correctly describes the dirt and oxides trapped in welds is inclusions. Inclusions refer to non-metallic materials or defects such as slag, dirt, or oxides that are entrapped during the welding process. They can affect the integrity and performance of the weld, leading to potential weaknesses in the material.

Understanding inclusions is critical for ensuring quality in welds, as they can create points of weakness or failure in structural applications. Proper welding techniques, including maintaining cleanliness and using suitable fluxes, can help minimize the presence of these inclusions. Identifying and addressing inclusions is part of ensuring sound welding practices and is essential for the durability and reliability of welded structures.