Classic cars forum & vehicle restoration.
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Ray White
Joined: 02 Dec 2014
Posts: 6316
Location: Derby
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 Posted: Wed Feb 15, 2023 12:29 pm Post subject: |
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| CWhaley1 wrote: |
I remember magnesium strips at school, but only when we set them on fire to produce a bright light! Remember having it burnt onto my retina for weeks.... |
When Water Companies (Boards as they were) laid cast iron pipes in the ground, apparently they would attach a bag of scrap magnesium to the pipe to delay corrosion.
"It acts as a sacrificial anode which reacts with oxygen more readily than iron so when corrosion occurs, the magnesium corrodes instead of the iron."
https://blog.thepipingmart.com/metals/relationship-between-magnesium-and-rust-prevention/ |
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CWhaley1
Joined: 13 Jul 2016
Posts: 61
Location: Derbyshire
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| Posted: Wed Feb 15, 2023 12:45 pm Post subject: |
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Had to look this up and it appears it was a standard practice -- interesting stuff. As you say, pretty much the same principle as me hanging my old socks and silica gel!
Seems they still do it except for now it's a magnesium block with wires. |
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