Canadian Welding Bureau (CWB) Level II Practice Exam

The optimal storage temperature for low-hydrogen electrodes is 120° Celsius. Low-hydrogen electrodes are designed to minimize the risk of hydrogen-induced cracking in welds, which can occur due to moisture absorption and environmental exposure. Storing these electrodes at a regulated temperature of 120° Celsius helps to keep the coatings dry, preventing moisture from being absorbed before they are used. This temperature is sufficiently high to drive off any moisture that may be present but not so high as to damage the electrode or alter its properties.

Maintaining the storage temperature within this range is crucial for ensuring the integrity and performance of the electrodes. Elevated temperatures below this point, while still somewhat effective, may not adequately prevent moisture absorption, leading to less optimal welding conditions and a higher risk of weld defects. Therefore, the designation of 120° Celsius stands out as the recommended practice for storing low-hydrogen electrodes in a way that maximizes their effectiveness and safety during welding operations.