Two Ways to Push the Same Electrons Both systems do the same job: they turn the pipeline into the cathode in its own corrosion cell so the steel stops giving up electrons to the surrounding soil. The difference is where those electrons come from. A galvanic system relies on a more reactive metal — magnesium, zinc, or aluminum — that corrodes on purpose so the pipeline doesn't have to. An impressed current system (ICCP) uses an external DC power supply (a rectifier) to push cu

Over the last couple years mixed metal oxide anodes have grown exponentially in popularity. They are light, easy to work with, have a high a