Corrosion in Underground fire mains

[SAK9]

Recently came across high corrosion in an underground fire ring main of MS construction(no coating) that runs on top of a mains electrical cable feeding the site.My understanding is that stray currents caused by a DC field can cause corrosion in pipe lines.Can an AC field cause corrosion in pipe lines?

 

[Metalguy]

In a word, yes.

http://webcache.googleusercontent.com/search?q=cache:1M8cjcg41r0J:

http://www.clihouston.com/news/ac-i...+line+pipe+corrosion&cd=2&hl=en&ct=clnk&gl=us

"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein

 

[EdStainless]

any stray currents can cause accelerated corrosion.
These should be treated like natural gas lines, OD coatings and cathodic protection.

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Plymouth Tube

 

[Guest102023]

Unless your pipe is way out in the middle of nowhere, you can assume there will be some stray current.