Basic welding electrode
A welding electrode consists of a solid filler metal rod that reacts with the base material during welding and produces high toughness in the weld metal. The coating usually consists of carbonates and fluorides.
Physical-Chemical Mechanism of Action
The basic welding electrode consists of a metal rod coated with a filler material. During welding, this filler reacts with the base material and forms a molten layer. The coating of carbonates and fluorides protects the electrode from corrosion and promotes melting.
Metallurgical Relevance & Risks in Welding
Using a basic welding electrode results in a weld metal with high toughness and low hydrogen content. Too high a hydrogen content can lead to hot cracking and wear problems. A missing coating can cause electrode corrosion, which impairs weld quality.
Workshop Practice & Instructions
Choose a basic welding electrode with a suitable coating for the selected base metal. Make sure the electrode is dry and free from corrosion. Use the correct voltage and current according to the manufacturer's instructions. Cool the weld slowly to achieve a homogeneous structure.