Aboveground Storage Tanks - Internal Paint

It doesn't look like having it powered up will affect the internal coating, but you will lose a sizeable amount of CP while the tank is empty. You may find this helpful.

I don't know where you are, but in the US, according to this, CP is required to be operatational during down times.

Thanks, I am based in the Middle East. Want to investigate further and will post you all an update.

Pleeze to klarify:

"does the foundation Cathodic Protection system effect (peeling-off) the Internal coat as it is still powered up?"

By this, are you asking: "Does the external CP system cause peeling of the internal Protective Coating (not "paint") when the tank is empty?"

The answer to THAT is an absolute, unequivocal NO. How on earth could it? There is no complete circuit for cathodic disbondment to be caused on the interior of a pipe-or-vessel as a result of over-protection (over-voltage) of the exterior CP syatem.

and, with respect to: "you will lose a sizeable amount of CP while the tank is empty." Not quite sure where yer gonna looze it to. However, internal CP (if it was in use) will be ineffective when the tank is empty, and, CP of the (outer) bottom-side will be sacrificed should contact with the soil be diminished as a result of the lightening of the now-empty tank.

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Hey Thanks, You got is sopt on.

I was worried due to the tank when empty the bottom plate maynot be 100% in contact with the foundation contributing to irregular current strengths being experienced by the bottom plate thus causing the paint to disbond thereby - failure due to peeling. There is no internal CP on this tank. Anyways, your answer clears the cloud.

Thanks again,