【摘要】 以304不锈钢(06Cr19Ni10)作为阴极构建海底生物燃料电池装置,研究了该电池对其海水腐蚀的阴极保护作用。自然腐蚀状态下不锈钢电位为-260 mV,阴极保护试样为-340 mV。荧光显微镜(FM)和扫描电镜(SEM)观察结果表明,两组试样的表面微生物附着情况差别不大,阴极保护试样表面腐蚀程度较低。电化学阻抗法及极化曲线测试表明,通电保护试样的阻抗值随时间增加逐渐增大,腐蚀电流密度Icorr逐渐减小,保护试样的抗腐蚀能力增强,电池装置对不锈钢阴极起到一定的保护作用。更多还原

【Abstract】 304 Stainless steel(06Cr19Ni10) is protected as a cathode in a benthic sediment microbial fuel cell and its corrosion performance is primarily investigated in this paper.The potential of 304 SS in natural seawater is about-260 mV,and the SS with protection about-340 mV.Fluorescence microscope and scanning electric microscope observation results show that there are no differences in the number of microorganisms on the surface of SS between the protected and unprotected sample but that the protected SS has a low corrosion rate.Electrochemical impedance spectroscopy(EIS) and polarization curve are measured,and the protected SS has a higher impedance value and a lower corrosion current density(Icorr) than the blank sample does.The results show that BMFC has a protection effect on the corrosion of 304SS.This research could be used as a new protection method against metallic corrosion in sea.更多还原