Laboratory reproduction of potential ennoblement of stainless steels in natural seawater

摘要: The localized corrosion susceptibility of stainless steels, such as type 3 16L, immersed in natural seawater is higher than those synthetic seawater. It widely observed that the potential steels becomes noble over +0.3V vs SCE. This phenomenon caused by influence microorganisms seawater, and therefore it considered Microbially Influenced Corrosion (MIC). In this paper, laboratory reproduction ennoblement was examined on basis metabolize aerobic bacteria (pH, dissolved oxygen metabolize). electrochemical measurements with bacterial mediums were carried out. became only cathodic current density increased around potential, these results suggest presence oxidizer metal surface which has redox oxygen. As during logarithmic phase growth result examination isolated bacteria, suggested metabolism effects potential. also reproduced addition oxidase simulatedmore » bacteria. produced peroxide reduction oxygen, generated included biofilm formed seawater.« less