铈掺杂TiO_2薄膜抗海水中硫酸盐还原菌的腐蚀性能研究  

CORROSION RESISTANCE BEHAVIOR OF CERIUM-DOPED TiO_2 FILM IN THE PRESENCE OF MARINE BACTERIUM SULFATE-REDUCING BACTERIA

作　　者：王洪芬[1] 王志奇[2] 洪海霞[1] 陈守刚[1] 尹衍升 

机构地区：[1]中国海洋大学材料科学与工程研究院,青岛266100 [2]中国科学院青岛生物能源与过程研究所,青岛266101

出　　处：《中国腐蚀与防护学报》2010年第6期481-486,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金项目(50672090;50702053);山东省自然科学基金项目(Y2008B46)资助

摘　　要：采用溶胶-凝胶法在304不锈钢表面制备了铈掺杂TiO_2薄膜,并采用半连续培养方式在海水中培养硫酸盐还原菌(SRB)。通过形貌观察及电化学方法研究浸泡于菌液中的空白304不锈钢及铈掺杂TiO_2/304ss电极的腐蚀行为。结果指出,在304不锈钢表面涂覆铈掺杂TiO_2薄膜后能显著抑制硫酸盐还原菌的附着行为;涂膜电极在硫酸盐还原菌菌液中的自腐蚀电流密度低于同期浸泡的空白304不锈钢电极,而电化学阻抗值则高于同期浸泡的空白304不锈钢电极,表明在304不锈钢表面涂覆铈掺杂TiO_2薄膜能起到抗海水中硫酸盐还原菌附着腐蚀的作用。Cerium-doped TiO2 film was prepared on 304 stainless steel by a sol-gel process.Sulfate-reducing bacteria（SRB） was incubated by semi-continuous culture method.The effect of SRB on corrosion behavior of cerium-doped TiO2/304ss and bare 304ss immersed in SRB medium were studied by morphology analysis and electrochemical methods.The results showed that cerium-doped TiO2 film on 304ss could inhibit attachment of SRB.The corrosion current density of cerium-doped TiO2/304ss was lower,while electrochemical impedance was higher than that of bare 304ss.Therefore,a conclusion could be drawn that cerium-doped TiO2 film coating on 304ss could inhibit attachment of SRB and prevent corrosion caused by SRB in seawater.

关 键 词：TIO2薄膜 硫酸盐还原菌 极化曲线 电化学阻抗谱 304不锈钢 

分 类 号：TG172[金属学及工艺—金属表面处理]