Dissolved Oxygen and pH Microelectrode Measurements at Water-Immersed Metal Surfaces

摘要

Investigation of microbial corrosion requires incorporation of both electrochemical and microbiological methods. Dissolved oxygen (DO) and pH were measured at metal/artificial seawater interfaces using microelectrodes in biotic and abiotic systems. Measurements in a closed system proved that presence of electrochemical and/or biological reaction products substantially influence the conditions at the metal surface. For long-term studies, only open (e.g., continuous flow) reactors should be used. An open channel flow reactor suitable both for microbiological and electrochemical measurements has been constructed and successfully tested. Reprints. (AW)