Pipline Cathodic Protection
Pipline Cathodic Protection
(OP)
I inadvertently posted this to another question on the forum; so here it is again.
I'm looking to protect a coated carbon steel pipe that carries seawater. In addition to the inside coating, the design calls for sacrificial anodes placed strategically on the inside, and an impressed current cathodic protection system on the outside for the buried segment of the pipeline.
Is there any potential that the outside impressed current system will impeded or affect the inside galvanic protection system?
I'm looking to protect a coated carbon steel pipe that carries seawater. In addition to the inside coating, the design calls for sacrificial anodes placed strategically on the inside, and an impressed current cathodic protection system on the outside for the buried segment of the pipeline.
Is there any potential that the outside impressed current system will impeded or affect the inside galvanic protection system?





RE: Pipline Cathodic Protection
As far as protection levels outside, there are guidelines for criteria (-850 mV CSE IR free the most common). As far as a spec requiring anodes in the pipe I won't comment...
RE: Pipline Cathodic Protection
So now I'm really interested in your "no comment" on the sac anodes on the inside. The pipe is 12 ft. diameter, essentially a covered ditch with coal tar/epoxy coating on the inside. I told them to install enough manways to maintain/replace the anodes, but I thought the ID anodes were an unusual option.
RE: Pipline Cathodic Protection
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Pipline Cathodic Protection
S
Corrosion Prevention & Corrosion Control
RE: Pipline Cathodic Protection
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Pipline Cathodic Protection