What is the minimum baking time for low alloy electrodes?

• A. 1 hour
• B. 2 hours
• C. 30 minutes
• D. 4 hours

Answer: (A)

Moisture in low alloy electrodes can introduce hydrogen into the weld, increasing the risk of hydrogen-induced cracking. Baking drives off that moisture, reducing hydrogen content to acceptable levels. The minimum time to achieve this drying, under typical baking conditions, is one hour, which is enough to remove the bulk of the absorbed moisture without overexposing the electrode. Shorter times may not purge enough moisture, while longer times (two hours or more) are used only if the electrodes are particularly damp or per manufacturer instructions. After baking, keep the electrodes in a dry, sealed environment and use them promptly to prevent reabsorption of moisture.