Corrosion in metal pipe carrying DC current?

[Baluncore]

, we want to be able communicate with the tools and power them in the same time,

Are the tools inside the pipe?
What are the tools being used for?
Are the tools held by people or operated remotely?
How much power do the tools require?
Over what distance do you need to control and power the tools?

I believe you are wasting time by keeping too many secrets.

 

[amrmohammed]

there are no secrets it is not even a project and I don't have anything physical, as I said to you and nerdcalc I was just asking about the concept I don't have much details.

Anyways, Thank you very much .. you really have been a great help.
Sorry for asking too many questions

 

[Jan Oredsson]

I find this discussion very interesting.
Can I try and summarize as follows:
1. Assumption is an indefinite long metallic pipe carrying a conductive liquid in an external conductive media, e.g. soil.
2. Outside are two independent ICCP systems providing two different external pipe/soil protection potentials at the two sides of an electric isolation in the pipe wall with indefinite DC impedance.
3. In principal, the potential difference cannot have any influence on the inside corrosion currents.
Do you agree with this?
Kind regards
Jan Oredsson