B10合金的硫酸盐还原菌腐蚀研究

电化学（中英文） ›› 2002, Vol. 8 ›› Issue (2): 191-194.

B10合金的硫酸盐还原菌腐蚀研究

刘光洲,钱建华,马焱,吴建华

七二五研究所青岛分部,七二五研究所青岛分部,七二五研究所青岛分部,七二五研究所青岛分部山东青岛266071 ,山东青岛266071 ,山东青岛266071 ,山东青岛266071

收稿日期:2002-05-28 修回日期:2002-05-28 出版日期:2002-05-28 发布日期:2002-05-28

Studies on Sulfate Reducing Bacteria Influenced Corrosion of 90/10 Cu/Ni Alloy

LIU Guang_zhou *,QIAN Jian_hua,MA Yan,WU Jian_hua

(Qingdao Branch of Luoyang Ship Material Research Institute,Qingdao 266071,China

Received:2002-05-28 Revised:2002-05-28 Published:2002-05-28 Online:2002-05-28

摘要/Abstract

摘要： 利用电化学方法研究了B1 0合金在含有硫酸盐还原菌的PostgateC培养基中的腐蚀电化学为 .结果表明 ,在有菌培养基中 ,B1 0合金的腐蚀电位剧烈负移 ,腐蚀速率显著增加 ,同时 ,由于硫化物覆盖层的形成 ,其阳极极化曲线出现“钝化”现象 .电子探针测量表明合金发生了镍和铁的选择性溶解 ,腐蚀形貌呈海绵状

关键词: 铜一镍合金, 微生物腐蚀, 硫酸盐还原菌

Abstract: Electrochemical techniques such as measurements of corrosion potential,the polarization resistance,and potentiodynamic scanning technique were used to investigate the electrochemical behavior of 90/10 Cu/Ni alloy in Postgate C medium containing sulfate reducing bacteria(SRB).The results showed that the corrosion potential of the alloy changed from -0.20 to -0.75 V(SCE) when bacteria inocula was added, and the polarization resistance R p decreased obviously,which corresponds to an increased corrosion rate. The shape ofthe anodic polarization curves was drastically changed in the presence of SRB, and an active_passive transition was observed. Electron probe microanalyzer was used to investigate the morphology and chemical composition of the corroded surface. The results showed that the dealloying of nickel and iron from the alloy happened,and the morphology was spongy. Based on these studies, a mechanism of SRB_influenced corrosion of the alloy was proposed.

Key words: Copper_nickel alloy, Microbiologically influenced corrosion (MIC), Sulfate reducing bacteria(SRB)

中图分类号:

TG172

刘光洲,钱建华,马焱,吴建华. B10合金的硫酸盐还原菌腐蚀研究[J]. 电化学（中英文）, 2002, 8(2): 191-194.

LIU Guang_zhou *,QIAN Jian_hua,MA Yan,WU Jian_hua . Studies on Sulfate Reducing Bacteria Influenced Corrosion of 90/10 Cu/Ni Alloy[J]. Journal of Electrochemistry, 2002, 8(2): 191-194.

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