How Do Power Lines Influence Underground Metal Corrosion?

AI Thread Summary
Power transmission lines can influence underground metal corrosion, but the discussion highlights that AC-induced eddy currents from these lines do not cause oxidation or corrosion according to electrochemical principles. Concerns about corrosion near power lines may stem from outdated practices or misunderstandings, as many structures have coexisted without issues for decades. The conversation notes that problems are more prevalent with DC systems, such as tramways, where lead-sheathed telecom cables faced significant corrosion challenges. Additionally, the use of metal posts in substations suggests that utilities do not perceive a significant risk of corrosion from nearby power lines. Overall, the recommendation for caution regarding underground metal structures near power lines may lack a solid scientific basis.
m.s.j
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According to some technical recommendation, we must be concerned about metal under ground structures (e.g. pipe lines) corrosion in neighbor of power transmission lines.
Sinusoidal high current elements can produce eddy induced currents in their surroundings .The eddy currents in electrical path around of power lines are AC type inherently. On the other hand, according to electrochemical fundamental laws, the AC induced current can not be caused any oxidation or corrosion effects.
How can you explain the reason of that recommendation?

BEST REGARDS
MSJ


--------------------------------------------------------------
Creative thinking is enjoyable,Then think about your surrounding things and other thought products. http://electrical-riddles.com
 
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It is a false alarm. Hundreds of thousands of structures near overhead power lines have decades of experience. The problems you fear are not really problems. If there were such problems , there would also be restrictions on what can be build near power lines.
 
m.s.j said:
According to some technical recommendation, we must be concerned about metal under ground structures (e.g. pipe lines) corrosion in neighbor of power transmission lines.
Sinusoidal high current elements can produce eddy induced currents in their surroundings .The eddy currents in electrical path around of power lines are AC type inherently. On the other hand, according to electrochemical fundamental laws, the AC induced current can not be caused any oxidation or corrosion effects.
How can you explain the reason of that recommendation?

BEST REGARDS
MSJ--------------------------------------------------------------
Creative thinking is enjoyable,Then think about your surrounding things and other thought products. http://electrical-riddles.com
There can be problems with undergound pipes and cables when the power system is DC, for instance, tramway system. It was a big problem when telecom cables were lead sheathed. It was the practice to impress a cathodic protection current on the cable to give protection.
 
If underground metal was a problem, utilities would not use metal posts to hold up the fence at substations.

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