AWWA D106 governs sacrificial anode systems for steel water tank interiors. Here's what the standard requires for anode material, sizing, and placement.

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

Ask five engineers how many anodes a given pipeline segment needs and you'll sometimes get five different answers, usually because someone started with anode count instead of current demand. Sizing a galvanic system correctly means working the problem in the right order: figure out how much current the structure needs first, then work backward to how many anodes deliver it -- reversing that order is where most oversized or undersized systems come from. Start With Current Dema

At its core, galvanic corrosion occurs when two dissimilar metals come into contact in the presence of an electrolyte, leading to the accele