Rubber and other elastomer materials, while not suitable for sealing steam or heat, can be used with water. Sealing heat or steam requires fiberglass-based or metal materials. Gaslight Lamp lit by burning gas. Gas Metal Arc Cutting Use of an external shielding gas, which produces an electric arc used to melt metal. The arc is produced between the consumable electrode and the metal that is to be cut.
Electric current is supplied by a variable transformer, through heavy electrical leads.
One lead is connected to the electrode and the other is connected to the metal being cut. The electrode is then held close to the metal so that an electric arc can move from the electrode to the metal, completing the circuit. Gas Metal Arc Welding Welding which is done by using an external shielding gas to weld the metals together with the heat generated by the electric arc that is produced between a consumable electrode and the metal being welded. Deep penetration of the weld, along with rapid deposits of weld metal are provided by this process. When pulsed current is used in electric arc welding process, it provides both the speed of gas metal arc welding along with reduced welding heat from the pulsed arc, thus avoiding the burn-through that can occur when welding thin metal.