Study On Control Methods Against Microorganism Attachment To The Surface Of Passive Metals In Seawater Environment

It is well known that the adsorption and growth of the microorganism can lead to microbiologically influenced corrosion (MIC) and biofouling for those equipments and materials used in seawater environment and cause tremendous loss. Problems due to MIC and biofouling of industrial systems range from heavy microbiological contamination with consequent energy and efficiency losses to structural failures. The most effective method to solve microbiological influenced corrosion and biofouling is to prevent and control the adsorption and growth of the microorganism. Nowadays the most common countermeasure is the application of biocides. For the complicated structure, biofilm can decrease the effectiveness of the biocides. Although can be killed by the biocides, unviable microorganisms and biofilm still attach on metal surfaces which can also cause corrosion. In addition, in view of environmental problems, the application of biocides will be limited increasingly. Therefore it is imperative under the situation that developing more effective control and preventive countermeasures.In order to find a sort of control and preventive method against microorganism attachment to the surface of passive metals in seawater, this paper used the relationship between the electrochemical parameters(the ennoblement of open circuit potential) of passive metal and microbes adhesion to study several countermeasures (electrochemical and ultrasonic methods) by electrochemical technology and epifluoresence microscopy. The main results and conclusions are summarized as follows:(1) Using the relationship between potential ennoblement and microbes...