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A comment on People may one day drill for copper as they now drill for oil. Parent comment

Re:People may one day drill for copper as they now drill for... by pfdietz on Thursday July 08, 2021 @06:58AM (#27770391)
Overhead electric power lines are typically aluminum-wrapped steel. They are not volume limited, so aluminum is better and cheaper than copper.
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Re:People may one day drill for copper as they now drill for... by hinkley on Thursday July 08, 2021 @01:58PM (#27775615)
The aluminum carries the current, the steel is for support (tensile strength).

How do they keep galvanic action from eating the whole assembly? I've never been clear on that bit.

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