During a tank test, the impressed current cathodic protection system should do what?

During a tank test, the impressed current cathodic protection system should do what?

• A. Should remain on at all times
• B. Should be off during test
• C. Should cycle on and off
• D. Not used

Answer: (A)

Keeping the impressed current cathodic protection system energized during the tank test is essential because its purpose is to hold the steel surface at a protective, negatively polarized potential that suppresses corrosion. During the test, the tank is filled and pressurized, creating conditions where the metal is more vulnerable to corrosion if protection is lost. If the system is turned off, the protective potential is lost and corrosion can proceed, which can affect the integrity of the tank and the test readings. Cycling on and off would cause unstable potentials and unprotected periods, undermining protection and potentially skewing results. Therefore, the system should remain on at all times to maintain consistent protection and reliable test conditions.

Keeping the impressed current cathodic protection system energized during the tank test is essential because its purpose is to hold the steel surface at a protective, negatively polarized potential that suppresses corrosion. During the test, the tank is filled and pressurized, creating conditions where the metal is more vulnerable to corrosion if protection is lost. If the system is turned off, the protective potential is lost and corrosion can proceed, which can affect the integrity of the tank and the test readings. Cycling on and off would cause unstable potentials and unprotected periods, undermining protection and potentially skewing results. Therefore, the system should remain on at all times to maintain consistent protection and reliable test conditions.