Electrochemical Evaluation of Biofilms and Calcareous Deposits Formed in NaturalSeawater

摘要

Electrochemical impedance spectroscopy (EIS) and corrosion potential (E corr)measurements were used to evaluate corrosion reactions on stainless steels (SS), Cu and Cu alloys during exposure to natural Pacific Ocean water. Additional laboratory measurements were performed in synthetic seawater. The electrochemical properties of SS types 304, 316, and A16X did not change at open-circuit potential during exposure times to natural seawater over four months. The electrochemical properties of Cu alloys were sensitive to exposure time, mass transport, and electrolyte composition. The interpretation of biofilms to corrosion of stainless steels is straightforward white that for the Cu alloys is more complicated. Biofouling, corrosion, biodeterioration, electrochemistry.