When d o you use dc plus vs minus when welding?

In welding, DC positive (DCEP) is typically used for processes like TIG (Tungsten Inert Gas) welding of non-ferrous metals, as it provides better penetration and a hotter arc, making it ideal for thicker materials. Conversely, DC negative (DCEN) is preferred for processes like MIG (Metal Inert Gas) welding and for thin materials, as it offers a cooler arc and less penetration, allowing for better control and reduced distortion. The choice between DC+ and DC- ultimately depends on the specific material, thickness, and desired characteristics of the weld.