Can I use a welder to weld two pieces of aluminum coil together?

Yes, you can weld two pieces of aluminum coil together, but it requires specific techniques and equipment. Aluminum welding is different from steel welding and requires a TIG (Tungsten Inert Gas) or MIG (Metal Inert Gas) welding process. It's crucial to use a clean, dry aluminum filler rod and maintain a clean, oxide-free surface on the aluminum. Additionally, a shielding gas like argon is necessary to protect the weld area from oxidation. Special precautions must be taken due to aluminum's high thermal conductivity and reactivity, so it's recommended to have experience or professional guidance when welding aluminum.