| 高洁艳,吴佳佳,张盾.假交替单胞菌对EH40/B10电偶腐蚀的影响[J].装备环境工程,2018,15(10):77-83. GAO Jie-yan,WU Jia-jia,ZHANG Dun.Impact of Pseudoalteromonas sp. on Galvanic Corrosion between B10 and EH40[J].Equipment Environmental Engineering,2018,15(10):77-83. |
| 假交替单胞菌对EH40/B10电偶腐蚀的影响 |
| Impact of Pseudoalteromonas sp. on Galvanic Corrosion between B10 and EH40 |
| 投稿时间：2018-08-23 修订日期：2018-10-25 |
| DOI：10.7643/ issn.1672-9242.2018.10.013 |
| 中文关键词: 电偶腐蚀 EH40 B10 假交替单胞菌 |
| 英文关键词:galvanic corrosion EH40 B10 Pseudoalteromonas sp. |
| 基金项目:国家重点研发计划课题（2016YFB0300604）；国家自然科学基金项目（51771180、41806087） |
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| Author | Institution |
| GAO Jie-yan | 1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; 2. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China; 3. Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China; 4. University of Chinese Academy of Sciences, Beijing 100049, China |
| WU Jia-jia | 1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; 2. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China; 3. Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China |
| ZHANG Dun | 1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; 2. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China; 3. Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China |
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| 中文摘要: |
| 目的 研究假交替单胞菌（Pseudoalteromonas sp.，P.sp.）对EH40/B10电偶腐蚀的影响。方法 利用电化学工作站测试EH40/B10电偶电流、电偶电位及开路电位，利用扫描电子显微镜和激光共聚焦显微镜分别观察浸泡21天后EH40、B10表面的腐蚀形貌和生物膜，并且测定体系的溶解氧浓度、pH和P.sp.的数量。结果 无菌体系的电偶电流远大于有菌体系，无菌体系的理论驱动电压也大于有菌体系。从腐蚀形貌来看，无菌体系中偶接B10比未偶接腐蚀得轻，而在有菌体系中是否偶接对EH40和B10的腐蚀形貌影响不大。无菌体系的溶解氧浓度远高于有菌体系，且有菌体系的pH比无菌体系低。结论 EH40/B10在无菌体系中的电偶腐蚀速率远大于在有菌体系，主要是因为P.sp.呼吸作用消耗氧气以及在电极表面形成生物膜从而抑制了电偶腐蚀。此外，在无菌体系中偶接B10受到了阴极保护，比未偶接腐蚀得轻，而在有菌体系中，是否偶接对EH40和B10的腐蚀影响不大，电偶腐蚀效应不明显。 |
| 英文摘要: |
| Objective To study the impact of Pseudoalteromonas sp. (P.sp.) on galvanic corrosion between B10 and EH40. Methods EH40/B10 galvanic current, couple potential and open circuit potential were carried out on an electrochemical work-station. The corrosion morphology and biofilms of EH40 and B10 after 21 days of immersion were observed by scanning electron microscopy and laser scanning confocal microscope, respectively. And the concentration of dissolved oxygen, pH and the number of P.sp. of the medium were also measured. Results The galvanic current and the theoretical driving voltage in the abiotic medium were much larger than that in the medium containing P.sp. According to corrosion morphology, the corrosion of coupled B10 was lighter than decoupled B10 in abiotic medium, while the coupling had little effect on the corrosion of EH40 and B10 in the P.sp. inoculated medium. The concentrations of dissolved oxygen and pH in the P.sp. The inoculated medium were lower than those in the abiotic medium. Conclusion The galvanic corrosion rate between B10 and EH40 in the abiotic medium was much higher than that in the P.sp. inoculated media, which is mainly due to oxygen consumption and biofilm formation of P.sp. Furthermore, coupled B10 is protected by cathodic protection from EH40 and less corrosive than decoupled B10 in the abiotic medium. However, the effect of coupling on the corrosion of EH40 and B10 is not significant in the P.sp. inoculated media, and the effect of galvanic corrosion is quite limited. |
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