Investigation of corrosion inhibitory process of marine Vibrio neocaledonicus sp. bacterium for carbon steel

The present work explains the corrosion inhibitory process of Vibrio neocaledonicus sp. bacterium for carbon steel. The first and significant inhibitory effect was obtained after 45 min of exposing carbon steel in the bacterial solution due to the adsorption of organic macromolecules on the surfaces and decrease in dissolved oxygen concentration. After that, biofilm covered the surfaces homogenously and thickened by exposure time; so the corrosion inhibitory effect increased by exposure time. EDS results detected the oxygen amount decreased in the presence of bacterium by expousre time due to biofilm formation and hindering the oxygen diffusion on the metal surfaces.