In the North Sea oil has been found in water depths exceeding 400 feet and at present conventional steel platforms are being installed in water depths 400 - 600 feet. These platforms need to be cathodically protected and it is necessary to know how anodes will behave under these depth conditions. A search of the literature revealed that no data either from a laboratory or practical point of view was available on the effect of water depth on anode performance. It was decided to carry out a series of tests in suitable sea conditions in order to try to evaluate the effect of depth on the performance of sacrificial anodes.

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