Abstract
The integrity of steel is affected by the adhesion of macrofouling organisms, which is an obstacle to their marine industry application. Corrosion of the fouled steel surface covered by oysters and ascidians was investigated, the results showed that the electrochemical processes, oxygen diffusion, ion transport paths, and secretion state differences caused differentiated corrosion forms with fouled steel. Manifested as localized corrosion at oyster/steel interface, while uniform corrosion at ascidian/steel interface from the state of the entire covering interface. A micro-reaction mechanism was finally proposed concerning the effects of Cl-, anaerobic bacteria, enclosed space, and secretions to reasonably explain this phenomenon.
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