Arcing, which is caused, for example, by organic degassing in a localized area of a
component's surface, can produce extremely high local temperatures. This can cause
localized melting and/or sputtering away of material from this point on the surface. The
occurrence of severe arcing on a component may mean it must be scrapped. A part that has
suffered even slight arcing could also require time-consuming and expensive finishing
operations. Arcing can also occur due to the presence of non-metallic inclusion stringers in
the work piece material.