Why shielded metal arc electrodes are often baked just prior to welding?

Shielded metal arc electrodes are often baked prior to welding to remove moisture and contaminants that can adversely affect weld quality. Moisture trapped in the electrode can lead to hydrogen porosity in the weld metal, resulting in weak joints and potential cracking. Baking helps ensure consistent arc stability and improves the overall integrity of the weld by promoting better fusion and reducing defects. This preparation step is crucial, especially in high-humidity environments or when using low-hydrogen electrodes.