海泥中SRB对纯锌阳极腐蚀行为的影响

材料研究学报, 2010, 24(4): 411-418.

海泥中SRB对纯锌阳极腐蚀行为的影响

1.1.重庆大学化学化工学院重庆 4000442.中国科学院海洋研究所青岛 266071>

1.1.College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 4000442.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071>

基金项目: 科技部国家支撑计划2007BAB27B01和中国科学院知识创新工程重要方向KZCX2-YW-210资助项目。

关键词：材料失效与保护 , sulfate reducing bacteria , electrochemical impedance spectroscopy , zinc , marine sediment

Effects of SRB on Corrosion of Pure Zinc Anode in Marine Sediment

LIU Fengling ZHANG Shengtao ZHANG Jie LI Weihua

Keywords： materials failure and protection , 硫酸盐还原菌 , 电化学阻抗谱 , 锌 , 海泥

测量锌阳极在海泥和含硫酸盐还原菌(SRB)海泥中构成的宏电池中的腐蚀, 研究了SRB对海泥中纯锌阳极材料的腐蚀行为的影响。结果表明, SRB能快速破坏纯锌的表面钝化膜, 提高锌阳极在海泥中的自腐蚀速率。在含SRB和无SRB海泥构成的宏电池体系中, 含菌海泥中的锌试样为电偶对的阳极, 腐蚀增大; 无菌海泥中的试样为电偶对的阴极, 腐蚀受到抑制。

Effects of Sulfate Reducing Bacteria (SRB) on corrosion of pure zinc anode in marine sediment was investigated by using electrochemical impedance spectroscopy, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The macrocell corrosion of the coupons with or without SRB in marine sediment was also studied. The results show that the passive film of pure zinc in marine sediment is quickly destroyed by SRB, and the corrosion rate of the coupons is increased. The corrosion of samples in the marine sediment with SRB is accelerated as the anode of macrocell, but the corrosion of samples in the marine sediment without SRB is inhibited as the cathode of macrocell.

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