Electrochemical study on 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one-added zinc coating in phosphate buffer saline medium with Escherichia coli

Zinc coating with 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT) was found to supply better antifouling properties by decreasing the attached bacterial concentration (especially living ones) in an Escherichia coli-suspended buffer aqueous medium through fluorescence microscopy. Using electrochemical methods, the DCOIT-added zinc coating exhibited more stable electrochemical performance than the pure zinc coating because of the inhibition on the oxygen diffusion process and the biofilm formation, which were also confirmed by the scanning electron microscopy observation.