When watching forging videos on YouTube, you can see that metal heated oxidises, and the resulting scale comes off when the steel is struck with a hammer. Would the same thing happen if you were to hook that same piece of steel up to, for example, a powerful battery and run an electric current through it to heat it up? And why/why not?
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Yes, it will still happen. Likely even faster than in a gas forge because none of the oxygen the steel will react with has been consumed by the fire.
This is why incandescent light bulbs need to encase the filament in glass, to keep oxygen away from it.
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