Welder Red Seal · Question
Why is it important to properly store low hydrogen electrodes (e.g., E7018) in a heated oven after opening the sealed container?
Low hydrogen electrodes are highly susceptible to moisture absorption. Moisture introduces hydrogen into the weld, which can cause hydrogen-induced cracking in
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Question: Why is it important to properly store low hydrogen electrodes (e.g., E7018) in a heated oven after opening the sealed container?
Answer options: ✅ To prevent moisture absorption which can lead to hydrogen-induced cracking
- To make them easier to strike an arc
- To improve their shelf life indefinitely
- To increase their tensile strength
Correct answer: To prevent moisture absorption which can lead to hydrogen-induced cracking
Explanation: Low hydrogen electrodes are highly susceptible to moisture absorption. Moisture introduces hydrogen into the weld, which can cause hydrogen-induced cracking in the weld metal and HAZ, especially in susceptible steels. Heated ovens keep them dry.
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