Definition - What does Weld mean?
A weld is the location where two metal pieces have been joined by the welding process. Weld also refers to the act of adhering two metal pieces to each other via the use of heat to melt the metals into a unified body or via the use of physical forces such as hammering or compression to join the metals at a mutual point.
Welding is commonly performed to join two metal pieces together.
Corrosionpedia explains Weld
Welding as a form of metal adhesion can be responsible for the generation of weld decay corrosion due to the softening and loss of intergranular strength at the point of heat application. Such decay is more common in stainless steel applications and can be prevented by using lower carbon steel grades and post-weld heat treatments.