Thread: The joys of Thameslink and its rotten core
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Old December 3rd 15, 07:44 PM posted to uk.railway,misc.transport.urban-transit,uk.transport.london
Charles Ellson[_2_] Charles Ellson[_2_] is offline
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Default The joys of Thameslink and its rotten core
On Thu, 3 Dec 2015 15:24:29 +0000 (UTC), d wrote:

On Thu, 03 Dec 2015 10:19:28 +0000
e27002 aurora wrote:
On Mon, 30 Nov 2015 10:20:15 -0800 (PST), wrote:
On an AC railway, the traction return circuit has to be earthed for safety
reasons and in any case, AC does not cause electrolytic corrosion. So at an

What happens if something in the ground acts like a partial diode?

You can still get some electrolytic corrosion with AC and any point
where different materials (especially if one is aluminium IIRC) meet
has potential (no pun intended) for a diode effect to enable/magnify
it.
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