Corrosion control is fundamental in the design and construction of offshore structures, and cathodic protection has proved itself to be preeminently a safety condition. However as regards corrosion prevention, a concrete platform is significantly different from conventional steel ones because corrosion or immunity of the supported metal items is opposed to the natural passivation of the rebar by the cement. Moreover on a drilling platform the wells, acting as continuation in soil of the structure immersed in sea water, are liable to affect the general corrosion prevention philosophy.

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