Microalgae and Corrosion

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Abstract
The principles behind the corrosion of steels in seawater and the protection mechanisms used to combat corrosion on offshore structures are described. Experiments on the ability of microalgae [Enteromorpha swarmers, diatoms and Oscillatoria] to modify the local environment of mild steel, affecting the steel''s corrosion rate, are presented. Such studies involve SEM [scanning electron microscopy] observations, the measurement of pH values occurring at the alga/substratum interface and polarization curve determinations.