Anode use in impressed current systems
Anode use in impressed current systems
(OP)
Hi,
I have just had to look into impressed current systems. I have seen several schematics, they all show an anode connected to the + terminal on a DC supply, with the material being protected connected to the - terminal.
From what I've read, the anode provides the current used in protection, and one schematic I saw referred to the DC source as a "pump".
My question is why is the anode necessary? Can't the DC source supply enough current?
I have just had to look into impressed current systems. I have seen several schematics, they all show an anode connected to the + terminal on a DC supply, with the material being protected connected to the - terminal.
From what I've read, the anode provides the current used in protection, and one schematic I saw referred to the DC source as a "pump".
My question is why is the anode necessary? Can't the DC source supply enough current?





RE: Anode use in impressed current systems
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Anode use in impressed current systems
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Plymouth Tube
RE: Anode use in impressed current systems
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Corrosion Prevention & Corrosion Control
RE: Anode use in impressed current systems
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5V Rpipe
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Wouldn't this be a better way to have current in the pipe?
RE: Anode use in impressed current systems
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Anode use in impressed current systems
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube
RE: Anode use in impressed current systems
While I can accept the explanations that the current must act at the surface of the electrolyte and pipe, I still don't fully see its necessity.
Wouldn't the leads on each end of the pipe still have current acting at the surface, thus eliminating the cathode and anode on the surface of the pipe?
RE: Anode use in impressed current systems
Our soils vary quite a bit in conductivity in short distances so we have to backfill the pipe trench with a conductive material to ensure that we have an even potential on the pipe surface.
RE: Anode use in impressed current systems
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Anode use in impressed current systems