COVERED ELECTRODE (MMA / SMAW)

Covered Electrode (SMAW, MMAW) – Similar to stick electrode. A filler metal electrode used in arc welding. It consisting of bare metal cored electrode with a covering with flux such as cellulose, titania, sodium binders. By the way, some type of flux has metallic addition to improve the weld bead properties. Heat from the arc serve the molten metal and generate covering gases by decomposing of flux to prevent weld bead contact with atmosphere. The decomposing of flux also produces slag to protect weld bead while cooling.