天然海水中聚吡咯膜的防微生物附着及防腐蚀性能

Antimicrobial Adhesion and Anticorrosion Properties of Polypyrrole Film in Natural Seawater

采用恒电流法在316 L不锈钢电极表面合成聚吡咯（PPy）,通过开路电位、生物显微镜（BM）、Tafel极化曲线及电化学交流阻抗（EIS）研究了聚吡咯防止微生物附着及防腐蚀特性.研究表明,沉积聚吡咯的316 L不锈钢电极浸泡在天然海水中（0-20 d）,开路电位基本保持不变,表明电化学合成的聚吡咯膜有良好的防止微生物附着能力,并通过生物显微镜进行了验证,且在浸泡的过程中其腐蚀电流密度维持在10^-7m A/cm^2,表现出良好的防腐蚀特性;浸泡50 d后,其防腐蚀效率仍高达97.45%.因此,电化学合成的聚吡咯具有优异的防止微生物附着和防腐蚀特性.

Polypyrrole was deposited on the surface of the 316L stainless steel electrode through galvanostatic method, and the antifouling property of the polypyrrole film in natural seawater was analyzed via open circuit potential, biological microscope, Tafel polarization curve and electrochemical impedance spectroscopy. It was found that the open circuit potential of the stainless steel electrode coated with polypyrrole was stable after 20 d of the immersion in the natural seawater, which indicates that the polypyrrole had a good ability to prevent the microorganism from attaching. This can be confirmed by the biological microscope. And the corrosion current density maintained at 10^-7 mA/cm^2 and showed good anticorrosion performance. The anticorrosion efficiency can still reach up 97. 45 % even the electrode is immersed in natural seawater for 50 d. Therefore, it could be concluded that the polypyrrole synthesized by electrochemical method exhibited good properties in the prevention of microbial attachment and good anticorrosion performance.