| 硫酸盐还原菌对海水状态和碳钢腐蚀行为的影响 |
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| 引用本文： | 严莉,王佳.硫酸盐还原菌对海水状态和碳钢腐蚀行为的影响[J].海洋科学,2004,28(9):70-74. |
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| 作者姓名： | 严莉 王佳 |
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| 作者单位： | 中国科学院,海洋研究所,山东,青岛,266071;中国科学院,研究生院,北京,100039;中国海洋大学,山东,青岛,266003;金属腐蚀与防护国家重点实验室,辽宁,沈阳,110016 |
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| 基金项目： | 国家高技术研究发展计划863项目(2001AA635080) |
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| 摘 要： | 采用溶液环境参数和电极电化学参数测量技术研究了海水中硫酸盐还原菌生长和衰亡过程对溶液状态和D36碳钢腐蚀过程的影响。结果表明，硫酸盐还原菌通过新陈代谢作用把溶液中的硫酸盐转化为硫离子而增大了氧化还原电位和酸度，并导致D36钢的腐蚀电位负移和腐蚀速度增加。极化曲线和电化学阻抗谱证实，虽然金属腐蚀过程在上述过程中并未发生机理性变化，但阳极过程和部分阴极过程的加速是腐蚀速度增加的主要原因。上述结果同时表明．硫酸盐还原菌本身和新陈代谢中间体并未直接参与腐蚀过程，主要是通过产生的硫离子改变溶液状态来加速腐蚀过程的。
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| 关 键 词： | 硫酸盐还原菌 海水 腐蚀 电化学 |
| 文章编号： | 1000-3096(2004)09-0070-05 |
| 收稿时间： | 2004/4/16 0:00:00 |
| 修稿时间： | 2004年4月16日 |
Effects of sulfate- reducing bacteria on seawater state and marine corrosion of D36 carbon steel |
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| YAN Li,WANG Jia.Effects of sulfate- reducing bacteria on seawater state and marine corrosion of D36 carbon steel[J].Marine Sciences,2004,28(9):70-74. |
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| Authors: | YAN Li WANG Jia |
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| Institution: | YAN Li1,2,WANG Jia3,4 |
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| Abstract: | Sulphate-reducing bacteria(SRB) growing in anaerobic environment aggravates the corrosion of metal. During the growth and decrease time of SRB in seawater, using Multi-Parameter water quality monitor and detection technology of electrochemistry, the parameters of solution containing SRB and the corrosion of D36 carbon steel influenced by SRB were studied. Results showed that the metabolism of SRB changed sulphate into sulphide, and increased the redox potential and acidity, which led the corrosion potential of D36 carbon steel to shift to a more negative value and speeded up the corrosion. Results of polarization measurement and electrochemical impedance spectroscopy (EIS) confirmed that the mechanism of the corrosion in the above procedure was not changed, but the increase of anode process and part of cathode process was the main cause of corrosion. And it also could be confirmed that the SRB and middle products of metabolism didn't affect the corrosion directly, and the increase of corrosion was caused by the S2- ion released from the metabolism of SRB in the solution. |
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| Keywords: | Sulphate-reducing bacteria Seawater Corrosion Electrochemistry |
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