Deep-water cathodic protection largely relies on sacrificial anodes. Such consumables draw corrosion to a specified location, thereby preserving the integrity of steel assets.

But due to the persistent nature of corrosion, the protected structures must be tested at intervals to ensure the anodes are still drawing the corrosion away from the steel, and depleted anodes must be replaced periodically.

“Everything that goes in needs cathodic protection,” Matthew Taylor, head of science and technology at Deepwater Corrosion Services, says.

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